CN103716236A - Route calculation method based on IS-IS protocol and equipment - Google Patents
Route calculation method based on IS-IS protocol and equipment Download PDFInfo
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- CN103716236A CN103716236A CN201310688472.6A CN201310688472A CN103716236A CN 103716236 A CN103716236 A CN 103716236A CN 201310688472 A CN201310688472 A CN 201310688472A CN 103716236 A CN103716236 A CN 103716236A
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Abstract
The invention discloses a route calculation method based on an IS-IS protocol and equipment. The method comprises the following steps: network equipment receives a LSP message carrying route information; the network equipment determines the TLV type of the LSP message and uses the TLV type to determine that the route information is an intra-domain route or an ex-domain route; the network equipment carries out configuration to enable the route priority of the intra-domain route to be higher than that of the ex-domain route; and during route calculation, the network equipment selects the route with higher route priority for route calculation. According to the embodiment of the invention, the intra-domain route can be selected first for route calculation so as to enable a data message of a user to be forwarded through the intra-domain route, prevent the ex-domain route from being selected first for route calculation and avoid a route loop.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of based on IS-IS(Intermediate System to Intermediate System, Intermediate System-to-Intermediate System) route computing method and the equipment of agreement.
Background technology
Intermediate System to Intermediate System is mainly by LSP(Link State Protocol Data Unit, Link State data protocol unit) message is noticed routing iinformation, the routing iinformation carrying in the LSP message of being received by each network equipment utilization calculates route, with the forwarding of guide data message.Wherein, Intermediate System to Intermediate System has been widely used in existing IP network, support various application, and along with the application on network increases, on core network, increasing external routes is introduced on core network for instructing forwarding, due to various reason, these external routes may be introduced in (as IS-IS network of level-1 etc.) in subsystems equally.
In existing route computational process, do not distinguish the route priority of route and overseas route in territory, this just may cause overseas route quilt in final route result of calculation of introducing preferred, and further causes user's data message not use route in territory to forward.
As shown in Figure 1, for introducing the application scenarios schematic diagram of overseas route in prior art, IPv4 route on the network equipment 1 with territory in route issue, while there is no overseas route in network, on the network equipment 4, acquire the cost(overhead value of route 15.1.1.0/24) be 11, type is that internal(is inner), down hop is the network equipment 3.Further, when introducing overseas route on the network equipment 2, the down hop of acquiring route 15.1.1.0/24 on the network equipment 4 may be the network equipment 2, route is now overseas route, it is not optimum route, thereby causes user's data message not use route in territory to forward; Further, in some more complicated networking, also may cause loop.
Summary of the invention
The embodiment of the present invention provides a kind of route computing method and equipment based on Intermediate System to Intermediate System, so that user's data message forwards by route in territory.
For achieving the above object, the embodiment of the present invention provides a kind of route computing method based on Intermediate System-to-Intermediate System Intermediate System to Intermediate System, is applied to comprise that in the system of a plurality of network equipments, described method comprises:
The network equipment receives the Link State data protocol unit LSP message that carries routing iinformation;
The described network equipment is determined the TLV type of described LSP message, and utilizes the TLV type of described LSP message to determine that the routing iinformation carrying in described LSP message is route in territory or overseas route;
In described network equipments configuration territory, the route priority of route is higher than the route priority of overseas route;
The described network equipment, when calculating route, preferentially selects the route that route priority is high to calculate route.
The described network equipment determines that the routing iinformation carrying in described LSP message is the process of route or overseas route in territory, specifically comprise: when the TLV of described LSP message type is IP internal reachability information TLV, the described network equipment determines that the routing iinformation carrying in described LSP message is route in territory; Or,
When the TLV of described LSP message type is the outside reachability information TLV of IP, the described network equipment determines that the routing iinformation carrying in described LSP message is overseas route; Or,
When the TLV of described LSP message type is expansion IP reachability TLV, if carried the sub-TLV of specified type in described LSP message, the described network equipment determines that the routing iinformation carrying in described LSP message is overseas route; If do not carry the sub-TLV of specified type in described LSP message, the described network equipment determines that the routing iinformation carrying in described LSP message is route in territory; Wherein, the sub-TLV of described specified type is overseas route for the routing iinformation that represents to expand IP reachability TLV and carry; Or,
When the TLV of described LSP message type is IPv6 accessibility TLV, when the X bit value in described IPv6 accessibility TLV is the first sign, the described network equipment determines that the routing iinformation carrying in described LSP message is overseas route; When the X bit value in described IPv6 accessibility TLV is not the first sign, the described network equipment determines that the routing iinformation carrying in described LSP message is route in territory; Wherein, to be used for distinguishing routing iinformation be route in overseas route or territory to the X bit value in described IPv6 accessibility TLV.
Described method further comprises: when the routing iinformation carrying in LSP message is overseas route, the described network equipment determines that the routing iinformation carrying in described LSP message is overseas internal type route or overseas external type route; The route priority of the overseas internal type of described network equipments configuration route is higher than the route priority of overseas external type route.
The described network equipment determines that the routing iinformation carrying in described LSP message is the process of overseas internal type route or overseas external type route, specifically comprises:
When the TLV of described LSP message type is the outside reachability information TLV of IP, when the E bit value in the outside reachability information TLV of described IP is the 3rd sign, the described network equipment determines that the routing iinformation carrying in described LSP message is overseas internal type route; When the E bit value in the outside reachability information TLV of described IP is the 4th sign, the described network equipment determines that the routing iinformation carrying in described LSP message is overseas external type route; Wherein, to be used for distinguishing routing iinformation be overseas internal type route or overseas external type route to the E bit value in the outside reachability information TLV of described IP.
The embodiment of the present invention provides a kind of network equipment, is applied to comprise that in the Intermediate System-to-Intermediate System IS-IS network of a plurality of network equipments, the described network equipment specifically comprises:
Receiver module, for receiving the Link State data protocol unit LSP message that carries routing iinformation;
Determination module, for determining the TLV type of described LSP message, and utilizes the TLV type of described LSP message to determine that the routing iinformation carrying in described LSP message is route in territory or overseas route;
Configuration module, for configuring the route priority of route in territory higher than the route priority of overseas route;
Computing module, for when calculating route, preferentially selects the route that route priority is high to calculate route.
Described determination module, while being IP internal reachability information TLV specifically for the TLV type at described LSP message, determines that the routing iinformation carrying in described LSP message is route in territory; Or, when the TLV of described LSP message type is the outside reachability information TLV of IP, determine that the routing iinformation carrying in described LSP message is overseas route; Or, when the TLV of described LSP message type is expansion IP reachability TLV, if carried the sub-TLV of specified type in described LSP message, determine that the routing iinformation carrying in described LSP message is overseas route; If do not carry the sub-TLV of specified type in described LSP message, determine that the routing iinformation carrying in described LSP message is route in territory; Wherein, the sub-TLV of described specified type is overseas route for the routing iinformation that represents to expand IP reachability TLV and carry; Or, when the TLV of described LSP message type is IPv6 accessibility TLV, when the X bit value in described IPv6 accessibility TLV is the first sign, determine that the routing iinformation carrying in described LSP message is overseas route; When the X bit value in described IPv6 accessibility TLV is not the first sign, determine that the routing iinformation carrying in described LSP message is route in territory; Wherein, to be used for distinguishing routing iinformation be route in overseas route or territory to the X bit value in described IPv6 accessibility TLV.
Described determination module, while being also overseas route for the routing iinformation carrying at LSP message, determines that the routing iinformation carrying in described LSP message is overseas internal type route or overseas external type route; Described configuration module, also for configuring the route priority of overseas internal type route higher than the route priority of overseas external type route.
Described determination module, be further used for when the TLV of described LSP message type is the outside reachability information TLV of IP, when the E bit value in the outside reachability information TLV of described IP is the 3rd sign, determine that the routing iinformation carrying in described LSP message is overseas internal type route; When the E bit value in the outside reachability information TLV of described IP is the 4th sign, determine that the routing iinformation carrying in described LSP message is overseas external type route; Wherein, to be used for distinguishing routing iinformation be overseas internal type route or overseas external type route to the E bit value in the outside reachability information TLV of described IP.
Compared with prior art, the embodiment of the present invention at least has the following advantages: in the embodiment of the present invention, the network equipment is after receiving LSP message, can utilize the TLV(Type Length Value of LSP message, type lengths values) type determines that the routing iinformation carrying in LSP message is route or overseas route in territory, and configure the route priority of route in territory higher than the route priority of overseas route, thereby when calculating route, can preferentially select route in territory to calculate route, then make user's data message forward by route in territory, avoiding preferential selects overseas route to calculate route, and can avoid route loop.
Accompanying drawing explanation
Fig. 1 is the application scenarios schematic diagram of introducing overseas route in prior art;
Fig. 2 is a kind of route computing method flow chart based on Intermediate System to Intermediate System that the embodiment of the present invention provides;
Fig. 3 is the structural representation of a kind of network equipment of providing of the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of route computing method based on Intermediate System to Intermediate System, and the method is applied to comprise that in the system (IS-IS system) of a plurality of network equipments, as shown in Figure 2, the method comprises the following steps:
Intermediate System to Intermediate System can be supported IPv4 protocol stack and IPv6 protocol stack, in LSP message, there are three class TLV to support the issue of IPv4 routing iinformation, this three class TLV is respectively: IP internal reachability information TLV(is IP internal reachability information TLV, it is commonly referred to TLV128), the outside reachability information TLV(of IP is IP external reachability information TLV, it is commonly referred to TLV130), expansion IP reachability TLV(is Extended IP reachability TLV, it is commonly referred to TLV135).In addition, have a class TLV to support the issue of IPv6 routing iinformation in LSP message, this TLV is specially: IPv6 accessibility TLV(is IPv6reachability TLV, and it is commonly referred to TLV236).
In IP internal reachability information TLV, issued routing iinformation in territory, comprise metric(scope 1-63), the information such as route-type (internal type); In the outside reachability information TLV of IP, issued the overseas routing iinformation of outside introducing, comprise metric(scope 1-127), the information such as route-type (having two types of internal and external); In expansion IP reachability TLV, the routing iinformation of issue comprises metric, route-type (having two types of internal and external) etc., but its metric scope is more much bigger than the above two, is 1-0xFE000000; In IPv6 accessibility TLV, the routing iinformation of issue comprises IPv6 prefix addresses, metric(scope 1-0xFE000000) and route-type etc.
In sum, in IP internal reachability information TLV, only can carry route in territory, the routing iinformation in IP internal reachability information TLV is route in territory; In the outside reachability information TLV of IP, only can carry overseas route, the routing iinformation in the outside reachability information TLV of IP is overseas route; In expansion IP reachability TLV, can carry route and overseas route in territory, the routing iinformation of expanding in IP reachability TLV can be route in territory or overseas route; In IPv6 accessibility TLV, can carry route and overseas route in territory, the routing iinformation in IPv6 accessibility TLV can be route in territory or overseas route.
Based on above-mentioned analysis, the routing iinformation that the network equipment carries in determining LSP message is in the process of route or overseas route in territory, if the TLV type of LSP message is IP internal reachability information TLV, the network equipment determines that the routing iinformation carrying in LSP message is route in territory; If the TLV type of LSP message is IP outside reachability information TLV, the network equipment determines that the routing iinformation carrying in LSP message is overseas route.In addition,, if the TLV type of LSP message is expansion IP reachability TLV, to need further to analyze the routing iinformation carrying in LSP message be route or overseas route in territory to the network equipment; If the TLV type of LSP message is IPv6 accessibility TLV, the routing iinformation carrying in the further analysis of network equipment needs LSP message is route or overseas route in territory.
Owing to can carrying route and overseas route in territory in expansion IP reachability TLV, therefore, can by whether carrying the sub-TLV(sub-tlv of specified type in expansion IP reachability TLV, as sub-tlv254) distinguish route and overseas route in territory, in expansion IP reachability TLV, increase a sub-TLV of specified type, and the sub-TLV of specified type is overseas route for the routing iinformation that represents to expand IP reachability TLV and carry, further, if do not carry the sub-TLV of this specified type, representing to expand the routing iinformation carrying in IP reachability TLV is route in territory.Based on the sub-TLV of specified type, when the TLV of LSP message type is expansion IP reachability TLV, if carried the sub-TLV of specified type in LSP message, the network equipment determines that the routing iinformation carrying in LSP message is overseas route; If do not carry the sub-TLV of specified type in LSP message, the network equipment determines that the routing iinformation carrying in LSP message is route in territory.
Owing to can carrying route and overseas route in territory in IPv6 accessibility TLV, therefore, can distinguish routing iinformation by the X bit value in expansion IPv6 accessibility TLV is route or overseas route in territory, when the X bit value in expansion IPv6 accessibility TLV is the first sign (as 1), represent that the routing iinformation carrying in expansion IPv6 accessibility TLV is overseas route, otherwise represent that the routing iinformation carrying in expansion IPv6 accessibility TLV is route in territory.Based on this X bit value, when the TLV of LSP message type is IPv6 accessibility TLV, when the X bit value in IPv6 accessibility TLV is the first sign (as 1), the network equipment determines that the routing iinformation carrying in LSP message is overseas route; When the X bit value in IPv6 accessibility TLV is not the first sign, the network equipment determines that the routing iinformation carrying in LSP message is route in territory.
Based on above-mentioned processing, process, in the embodiment of the present invention, the network equipment is after receiving LSP message, utilize the TLV type of LSP message to determine that the routing iinformation carrying in LSP message is route in territory or overseas route, and configure the route priority of route in territory higher than the route priority of overseas route, thereby when calculating route, can preferentially select route in territory to calculate route, and user's data message is forwarded by route in territory, avoid preferential and select overseas route to calculate route, and can avoid route loop.
In the embodiment of the present invention, when the routing iinformation carrying in LSP message is overseas route, the network equipment can also determine that the routing iinformation carrying in LSP message is overseas internal type route or overseas external type route; Further, the route priority of the overseas internal type of network equipments configuration route is higher than the route priority of overseas external type route, now, in territory, the route priority of route is higher than the route priority of overseas internal type route, and the route priority of overseas internal type route is higher than the route priority of overseas external type route.Based on this, the network equipment is when calculating route, and for overseas internal type route and overseas external type route, the network equipment can preferentially select the overseas internal type route that route priority is high to calculate route.
The network equipment determines that the routing iinformation carrying in LSP message is in the process of overseas internal type route or overseas external type route, when the TLV of LSP message type is the outside reachability information TLV of IP, when the E bit value in the outside reachability information TLV of IP is the 3rd sign (as 1), the network equipment determines that the routing iinformation carrying in LSP message is overseas internal type route; When the E bit value in the outside reachability information TLV of IP is the 4th sign (as 0), the network equipment determines that the routing iinformation carrying in LSP message is overseas external type route.Wherein, to be used for distinguishing routing iinformation be overseas internal type route or overseas external type route to the E bit value in the outside reachability information TLV of IP.
In sum, in the embodiment of the present invention, the network equipment, when configuration route priority, can be followed the equipping rules of following route priority: in (1) territory, the route priority of route is higher than the route priority of overseas route; (2) in territory, the route priority of route is higher than the route priority of overseas internal type route, and the route priority of overseas internal type route is higher than the route priority of overseas external type route; (3) the route priority of L1 route (being the route under Level-1) is higher than the route priority of L2 route (being the route under Level-2); (4) without UP(, open)/DOWN(closes) the route priority of bit route is higher than the route priority that has UP/DOWN bit route.
Equipping rules based on above-mentioned route priority, the network equipment is when calculating route, the information of information, L1 route and the L2 route of the information based on route in territory and overseas route, overseas internal type route and overseas external type route, without UP/DOWN bit route and the information etc. that has UP/DOWN bit route, the network equipment can calculate optimum route from the route of limit priority.Further, for the route of equal priority, the network equipment can calculate optimum route from the little route of metric.
Under the application scenarios shown in Fig. 1, configure network devices 1 is that narrow-compatible pattern (can send the LSP message that carries IP internal reachability information TLV or the outside reachability information TLV of IP, and can process the LSP message that carries expansion IP reachability TLV of receiving), configure network devices 2 is that wide-compatible pattern (can send the LSP message that carries expansion IP reachability TLV, and can process the LSP message that carries IP internal reachability information TLV or the outside reachability information TLV of IP of receiving), and configure network devices 3 and the network equipment 4 (can send and carry IP internal reachability information TLV for compatible pattern, or the outside reachability information TLV of IP, or the LSP message of expansion IP reachability TLV, and can process the IP internal reachability information of the carrying TLV receiving, or the outside reachability information TLV of IP, or the LSP message of expansion IP reachability TLV).
Under this application scenarios, the LSP message of IP internal reachability information TLV is carried in the network equipment 1 issue, in this LSP message, has issued route prefix 15.1.1.0/24, and metric is 10; The network equipment 2 has been introduced overseas route 15.1.1.0/24, and its metric is 1, and the network equipment 2 issue carries the LSP message of expansion IP reachability TLV, in this LSP message, carries sub-tlv254, is internal type.
Based on this, when the network equipment 4 calculates in route, for route 15.1.1.0/24, there are a plurality of issue sources, be respectively the network equipment 1 and the network equipment 2; Wherein the network equipment 1 issue is route-type in territory, what the network equipment 2 was issued is overseas route-type, therefore the priority of the route of the priority ratio network equipment 2 issues of the route of the network equipment 1 issue is high, thereby can guarantee route in the network equipment 4 preference fields, calculating next hop information is the network equipment 3, thereby avoids the overseas route of preferred network equipment 2 issues.
Inventive concept based on same with said method, a kind of network equipment (as routing device or three-tier switch etc.) is also provided in the embodiment of the present invention, this network equipment is applied to comprise in the Intermediate System-to-Intermediate System IS-IS network of a plurality of network equipments, as shown in Figure 3, the described network equipment specifically comprises:
Receiver module 11, for receiving the Link State data protocol unit LSP message that carries routing iinformation;
Determination module 12, for determining the TLV type of described LSP message, utilizes the TLV type of described LSP message to determine that the routing iinformation carrying in described LSP message is route in territory or overseas route;
Configuration module 13, for configuring the priority of route in territory higher than the route priority of overseas route;
Computing module 14, selects the route that route priority is high to calculate route for preferential when calculating route.
Described determination module 12, while being IP internal reachability information TLV specifically for the TLV type at described LSP message, determines that the routing iinformation carrying in described LSP message is route in territory; Or, when the TLV of described LSP message type is the outside reachability information TLV of IP, determine that the routing iinformation carrying in described LSP message is overseas route; Or, when the TLV of described LSP message type is expansion IP reachability TLV, if carried the sub-TLV of specified type in described LSP message, determine that the routing iinformation carrying in described LSP message is overseas route; If do not carry the sub-TLV of specified type in described LSP message, determine that the routing iinformation carrying in described LSP message is route in territory; Wherein, the sub-TLV of described specified type is overseas route for the routing iinformation that represents to expand IP reachability TLV and carry; Or, when the TLV of described LSP message type is IPv6 accessibility TLV, when the X bit value in described IPv6 accessibility TLV is the first sign, determine that the routing iinformation carrying in described LSP message is overseas route; When the X bit value in described IPv6 accessibility TLV is not the first sign, determine that the routing iinformation carrying in described LSP message is route in territory; Wherein, to be used for distinguishing routing iinformation be route in overseas route or territory to the X bit value in described IPv6 accessibility TLV.
Described determination module 12, while being also overseas route for the routing iinformation carrying at LSP message, determines that the routing iinformation carrying in described LSP message is overseas internal type route or overseas external type route; Described configuration module 13, also for configuring the route priority of overseas internal type route higher than the route priority of overseas external type route.
Described determination module 12, be further used for when the TLV of described LSP message type is the outside reachability information TLV of IP, when the E bit value in the outside reachability information TLV of described IP is the 3rd sign, determine that the routing iinformation carrying in described LSP message is overseas internal type route; When the E bit value in the outside reachability information TLV of described IP is the 4th sign, determine that the routing iinformation carrying in described LSP message is overseas external type route; Wherein, to be used for distinguishing routing iinformation be overseas internal type route or overseas external type route to the E bit value in the outside reachability information TLV of described IP.
Wherein, the modules of apparatus of the present invention can be integrated in one, and also can separatedly dispose.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can be distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (8)
1. the route computing method based on Intermediate System-to-Intermediate System Intermediate System to Intermediate System, is applied to comprise in the system of a plurality of network equipments, it is characterized in that, said method comprising the steps of:
The network equipment receives the Link State data protocol unit LSP message that carries routing iinformation;
The described network equipment is determined the TLV type of described LSP message, and utilizes the TLV type of described LSP message to determine that the routing iinformation carrying in described LSP message is route in territory or overseas route;
In described network equipments configuration territory, the route priority of route is higher than the route priority of overseas route;
The described network equipment, when calculating route, preferentially selects the route that route priority is high to calculate route.
2. the method for claim 1, is characterized in that, the described network equipment determines that the routing iinformation carrying in described LSP message is the process of route or overseas route in territory, specifically comprises:
When the TLV of described LSP message type is IP internal reachability information TLV, the described network equipment determines that the routing iinformation carrying in described LSP message is route in territory; Or,
When the TLV of described LSP message type is the outside reachability information TLV of IP, the described network equipment determines that the routing iinformation carrying in described LSP message is overseas route; Or,
When the TLV of described LSP message type is expansion IP reachability TLV, if carried the sub-TLV of specified type in described LSP message, the described network equipment determines that the routing iinformation carrying in described LSP message is overseas route; If do not carry the sub-TLV of specified type in described LSP message, the described network equipment determines that the routing iinformation carrying in described LSP message is route in territory; Wherein, the sub-TLV of described specified type is overseas route for the routing iinformation that represents to expand IP reachability TLV and carry; Or,
When the TLV of described LSP message type is IPv6 accessibility TLV, when the X bit value in described IPv6 accessibility TLV is the first sign, the described network equipment determines that the routing iinformation carrying in described LSP message is overseas route; When the X bit value in described IPv6 accessibility TLV is not the first sign, the described network equipment determines that the routing iinformation carrying in described LSP message is route in territory; Wherein, to be used for distinguishing routing iinformation be route in overseas route or territory to the X bit value in described IPv6 accessibility TLV.
3. the method for claim 1, is characterized in that, described method further comprises:
When the routing iinformation carrying in LSP message is overseas route, the described network equipment determines that the routing iinformation carrying in described LSP message is overseas internal type route or overseas external type route;
The route priority of the overseas internal type of described network equipments configuration route is higher than the route priority of overseas external type route.
4. method as claimed in claim 3, is characterized in that,
The described network equipment determines that the routing iinformation carrying in described LSP message is the process of overseas internal type route or overseas external type route, specifically comprises:
When the TLV of described LSP message type is the outside reachability information TLV of IP, when the E bit value in the outside reachability information TLV of described IP is the 3rd sign, the described network equipment determines that the routing iinformation carrying in described LSP message is overseas internal type route; When the E bit value in the outside reachability information TLV of described IP is the 4th sign, the described network equipment determines that the routing iinformation carrying in described LSP message is overseas external type route; Wherein, to be used for distinguishing routing iinformation be overseas internal type route or overseas external type route to the E bit value in the outside reachability information TLV of described IP.
5. a network equipment, is applied to comprise in the Intermediate System-to-Intermediate System IS-IS network of a plurality of network equipments, and it is characterized in that, the described network equipment specifically comprises:
Receiver module, for receiving the Link State data protocol unit LSP message that carries routing iinformation;
Determination module, for determining the TLV type of described LSP message, and utilizes the TLV type of described LSP message to determine that the routing iinformation carrying in described LSP message is route in territory or overseas route;
Configuration module, for configuring the route priority of route in territory higher than the route priority of overseas route;
Computing module, for when calculating route, preferentially selects the route that route priority is high to calculate route.
6. the network equipment as claimed in claim 5, is characterized in that,
Described determination module, while being IP internal reachability information TLV specifically for the TLV type at described LSP message, determines that the routing iinformation carrying in described LSP message is route in territory; Or, when the TLV of described LSP message type is the outside reachability information TLV of IP, determine that the routing iinformation carrying in described LSP message is overseas route; Or, when the TLV of described LSP message type is expansion IP reachability TLV, if carried the sub-TLV of specified type in described LSP message, determine that the routing iinformation carrying in described LSP message is overseas route; If do not carry the sub-TLV of specified type in described LSP message, determine that the routing iinformation carrying in described LSP message is route in territory; Wherein, the sub-TLV of described specified type is overseas route for the routing iinformation that represents to expand IP reachability TLV and carry; Or, when the TLV of described LSP message type is IPv6 accessibility TLV, when the X bit value in described IPv6 accessibility TLV is the first sign, determine that the routing iinformation carrying in described LSP message is overseas route; When the X bit value in described IPv6 accessibility TLV is not the first sign, determine that the routing iinformation carrying in described LSP message is route in territory; Wherein, to be used for distinguishing routing iinformation be route in overseas route or territory to the X bit value in described IPv6 accessibility TLV.
7. the network equipment as claimed in claim 5, is characterized in that,
Described determination module, while being also overseas route for the routing iinformation carrying at LSP message, determines that the routing iinformation carrying in described LSP message is overseas internal type route or overseas external type route;
Described configuration module, also for configuring the route priority of overseas internal type route higher than the route priority of overseas external type route.
8. the network equipment as claimed in claim 7, is characterized in that,
Described determination module, be further used for when the TLV of described LSP message type is the outside reachability information TLV of IP, when the E bit value in the outside reachability information TLV of described IP is the 3rd sign, determine that the routing iinformation carrying in described LSP message is overseas internal type route; When the E bit value in the outside reachability information TLV of described IP is the 4th sign, determine that the routing iinformation carrying in described LSP message is overseas external type route; Wherein, to be used for distinguishing routing iinformation be overseas internal type route or overseas external type route to the E bit value in the outside reachability information TLV of described IP.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105591798B (en) * | 2015-07-24 | 2019-04-09 | 新华三技术有限公司 | The method, apparatus of OAM Information is transmitted in DCN |
| CN107911298A (en) * | 2017-12-29 | 2018-04-13 | 杭州迪普科技股份有限公司 | A kind of method and device of the route redistribution based on ISIS |
| CN107911298B (en) * | 2017-12-29 | 2020-03-06 | 杭州迪普科技股份有限公司 | ISIS-based routing redistribution method and device |
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