CN1571423A - Method for implementing neighbor discovery of different link layer separated domain - Google Patents
Method for implementing neighbor discovery of different link layer separated domain Download PDFInfo
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- CN1571423A CN1571423A CN 03178394 CN03178394A CN1571423A CN 1571423 A CN1571423 A CN 1571423A CN 03178394 CN03178394 CN 03178394 CN 03178394 A CN03178394 A CN 03178394A CN 1571423 A CN1571423 A CN 1571423A
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Abstract
The invention relates to neighbor discovery realization method in different link layer isolation zoom. IPv6 address, link layer address, and binding relational table of the isolation zoom label valve are set in the router. The host computer of the isolation zoom is sent out the neighbor request information to search the hardware address of the other host computer. After the link layer access device is received the neighbor request information, the isolation zoom label valve is inserted to transfer the neighbor request information to the router. The router is enquired the binding relational table. If the purpose host computer and the host computer sent out the neighbor request information are in the different isolation zoom, the neighbor request information will answer on its own initiative, and the router own hardware address will be supplied to deceive the initiating terminal initiated the neighbor request to make the different isolation zoom host computer isolated by link layer access device can be normally communicated each other.
Description
Technical field
The present invention relates to communication technical field, the neighbours that relate in particular to different link layer quarantine domain in a kind of IPv6 (Internet protocol sixth version) network find (ND) implementation method.
Background technology
Neighbours find that (ND:Neighbor Discovery) mechanism is a basic agreement of IPv6 (Internet protocol sixth version) network, and it comprises router discoverys, prefix discovery, address resolution and the unreachable detection of neighbours, function such as redirected.Router among ARP (address resolution protocol), the ICMP (control messages agreement between net) of the Neighbor Discovery Protocol of IPv6 (hereinafter to be referred as the ND agreement) and IPv4 (Internet protocol the 4th edition) find and ICMP redirected corresponding, in IPv4, do not stipulate unreachable testing mechanism of corresponding neighbours and agreement, these functions realize in the ND agreement and have carried out certain expansion that the ND agreement has solved the interoperability problem between all nodes that are connected on same the link.
IPv6 ND agreement is independent of concrete link layer by ICMPv6 (Internet Control Message Protocol sixth version) message bearing in the prior art, the state information of other neighbor node in the Dynamic Maintenance link.The neighbor request message of ICMPv6 and neighbours' announcement message are used for obtaining the pairing hardware address in assigned ip v6 address in link local scope (Link-local scope), but the destination address of node analytical capabilities of direct communication in the link local scope is provided for sender node.
At present, convenient for operation management, reduce route table items, prevent that the user from walking around operator's intercommunication privately, save the consideration of IPv6 address, the interface of BAS (BAS Broadband Access Server) equipment is provided with the following situation of common employing: within the link local scope, though on network level, be in the same network segment between the node, but but be to isolate mutually on the link aspect, the for example isolation between the different vlan ports under the Virtual Local Area Network access way, so, the neighbor request message that is in the transmitting terminal in certain quarantine domain can not arrive the link layer that is in the destination in other quarantine domain, therefore address resolution operation in this case must be failed, and the result is that make can not proper communication between the main frame that is in different quarantine domain.
Summary of the invention
Technical problem to be solved by this invention is: overcoming existing neighbor discovery mechanisms can't be under the situation that link layer is isolated, neighbor request message is sent to the deficiency of other quarantine domain destination link layer, the implementation method that neighbours find under a kind of link layer isolated instances is provided, can proper communication between the main frame that is in different quarantine domain thereby make.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:
The neighbours of this different link layer quarantine domain find implementation method, it is characterized in that: the binding relationship table of Internet protocol sixth version (IPv6) address, link layer address and quarantine domain label value is set in router, and the communication between the different quarantine domain main frames of realizing isolating by the link layer access device by following steps:
Main frame in A, the quarantine domain sends the hardware address that neighbor request message is searched other main frame;
After B, link layer access device receive this neighbor request message, insert this quarantine domain label value, this neighbor request message is passed to router;
C, router are inquired about the binding relationship table, if judge destination host and the main frame that sends neighbor request message not at same quarantine domain, and active response neighbor request message then, and the hardware address of router oneself is provided;
D, the main frame that sends neighbor request message are received the neighbor advertisement message from the router response, and sending destination to router is the datagram of described destination host;
After E, router are received this datagram, utilize the routing iinformation in the routing table that datagram is transmitted to this destination host.
Described binding relationship table is provided with in router and safeguards, generates by router study neighbor request message, or initiatively initiates the neighbor request inquiry by router and generate.
Each list item in the described binding relationship table also disposes ageing time, and described ageing time is carried out initialization when relevant entries is added the binding relationship table to.
Among the described step C, router is inquired about the binding relationship table, judges whether destination host is as follows in the step of same quarantine domain with the main frame that sends neighbor request message:
A, router parse IPv6 address, source, link layer address and quarantine domain label value and Target IP v6 address from described neighbor request message, according to source IPv6 address lookup binding relationship table;
If the b successful inquiring is then done consistency check to link layer address and quarantine domain label value; If consistent, then, enter step c according to Target IP V6 address lookup binding relationship table; If inconsistent, then finish the current processing of router to neighbor request message;
If c then obtains the quarantine domain label value according to Target IP v6 address lookup binding relationship telogenesis merit, the quarantine domain label value of router reference source IPv6 address correspondence and the quarantine domain label value of Target IP v6 address correspondence judge whether be in same quarantine domain.
Further comprise among the described step b, if, then in the binding relationship table, add relevant entries according to the failure of source IPv6 address lookup binding relationship table, and the initialization ageing time.
Further comprise among the described step c, if fail according to Target IP v6 address lookup binding relationship table, then router initiatively sends the neighbor request message to this Target IP v6 address, wait acknowledge, if receive neighbours' announcement message, then obtain the quarantine domain label value, and in the binding relationship table, add relevant entries, the initialization ageing time.
If do not receive neighbours' announcement message, then simply abandon neighbor request message, finish the current processing of router to neighbor request message.
If destination host and the main frame that sends neighbor request message are at same quarantine domain among the described step C, then router simply abandons neighbor request message, finishes the current processing to neighbor request message of router.
Being connected between described link layer access device and the router adopted class link aggregation (Trunk) mode, guarantees that the quarantine domain label value is delivered to router.
Described link layer access device is a LAN switch.
Beneficial effect of the present invention is: some node is in the same network segment in the existing link local scope on network level though the present invention is directed to, but be to isolate the deficiency that the neighbor request message of being brought can't send to other quarantine domain destination link layer mutually on the link aspect, adopt the IPv6 address, link layer address, and the quarantine domain label realizes that the neighbours between the main frame that link layer isolates find agent skill group, can solve well under same IPv6 subnet, intercommunication problem between the main frame of the different quarantine domain under the link layer isolated instances, and convenient without prejudice to operation management, reduce route table items, prevent that the user from walking around operator's intercommunication privately, save the agreement original intention of IPv6 address.
Description of drawings
Fig. 1 is neighbours' discovery technique scheme topology diagram of the present invention;
Fig. 2 finds realization flow figure for neighbours of the present invention.
Embodiment
With embodiment the present invention is described in further detail with reference to the accompanying drawings below:
Within the link local scope, though some node is in the same network segment on network level, but but be to isolate mutually on the link aspect, the present invention adopts has the router that IPv6 neighbours find agency's (ND Agent) function, router with neighbor advertisement agent functionality can be cheated the transmitting terminal of initiating neighbor request, making it take for this router is exactly destination, make the transmitting terminal that is in certain quarantine domain feel that the neighbor request message of oneself is in normal the reception and processing of destination in other quarantine domain, and can proper communication between transmitting terminal and the destination.
Be illustrated in figure 1 as neighbours' discovery technique scheme topology diagram of the present invention, wherein:
Router (Router) has neighbours and finds agency's (ND Agent) function, if the main frame in the quarantine domain 1 is initiated the neighbor request to the main frame in the quarantine domain 2, this router can be cheated the transmitting terminal in the quarantine domain 1 so, and making it take for router is exactly destination in the quarantine domain 2.
LAN switch (LanSwitch) provides the equipment that link layer inserts, the configuration and the realization function that can provide link layer to isolate.Being connected between LAN switch and the router adopted class Trunk (link aggregation) mode, is delivered to router to guarantee the quarantine domain label value.
PC1, PC2, PC3 and PC4 are in the main frame under the same interface of router, and promptly they all are in same IPv6 subnet, and PC1 and PC2 be among the quarantine domain 1, and the link layer between them can intercommunication; PC3 and PC4 are among the quarantine domain 2, and the link layer between them can intercommunication, but but can not intercommunication on the link aspect between PC1, PC2 and PC3, the PC4.
The present invention safeguards the binding relationship table in router, it is the binding relationship table of IPv6 address, link layer address and quarantine domain label value, this list item generates by router study neighbor request message, and in addition, this list item is also initiatively initiated the neighbor request inquiry by router and generated.Each list item of binding relationship table also disposes ageing time, and the binding relationship table is as shown in the table:
| The IPv6 address | Link layer address | The quarantine domain label value | Ageing time |
Be illustrated in figure 2 as neighbours of the present invention and find realization flow figure, key of the present invention is how router knows the operation of need acting as agent, be that neighbours find to act on behalf of activation technique, initiating neighbor request with the host PC among Fig. 11 to PC3 is that example specifically describes the step that realizes:
1, router is received the broadcasting neighbor request message of searching the PC3 hardware address from host PC 1, and host PC 1 is thought PC3 among the link local scope, changes step 2;
2, router parses IPv6 address, source, link layer address and quarantine domain label value and Target IP v6 address from this neighbor request message, and wherein the quarantine domain label is to be added by force when transmitting neighbor request message by the access device (as the LAN switch in this example) of link layer.Router concludes that Target IP v6 address is not this machine address, so according to source IPv6 address lookup binding relationship table:
1),, then changes step 5 if inconsistent if, then link layer address and quarantine domain label value are done consistency check according to source IPv6 address lookup binding relationship telogenesis merit; If consistent, then change step 3;
2) if, then in the binding relationship table, add relevant entries according to the failure of source IPv6 address lookup binding relationship table, the initialization ageing time, and change step 3;
3, router is according to Target IP v6 address lookup binding relationship table:
1), and changes step 4 if successful inquiring is obtained the quarantine domain label value;
2) if inquiry failure (the corresponding list item of possibility has been worn out or also do not learnt relevant information), then router initiatively sends the neighbor request message to this Target IP v6 address, wait acknowledge, if receive neighbours' announcement message, then obtain the quarantine domain label value, and in the binding relationship table, add relevant entries, the initialization ageing time is changeed step 4 again; If do not receive neighbours' announcement message, then simply abandon neighbor request message, and change step 5;
4, the quarantine domain label value of the quarantine domain label value of router reference source IPv6 address correspondence and Target IP v6 address correspondence:
1) if equate, originating end and destination are described among same quarantine domain, router simply abandons neighbor request message so, and changes step 5;
2) if inequality, originating end and destination are described among different quarantine domain, the router operation of must acting as agent so, i.e. the neighbor request message of router active response PC1, and the link layer address of router oneself is provided, and change step 5;
5, finish the current processing of router to neighbor request message.
With Fig. 1 is example, and the intercommunication first time of PC1 and PC3 is set up by ND Agent technology of the present invention, and concrete handling process is as follows:
1) PC1 in the quarantine domain 1 is in order to search the hardware address of PC3, and PC1 sends the broadcasting neighbor request message, broadcasting in quarantine domain 1;
2) LAN switch receives this neighbor request message, and passes to router, contains the quarantine domain label value simultaneously;
3) router utilization neighbours find to act on behalf of activation technique, determine PC1 and PC3 not at same quarantine domain, then the neighbor request message of router active response PC1, and the hardware address (not being the hardware address of PC3) of router oneself is provided;
4) PC1 receives the neighbor advertisement message from router, and this moment, PC1 thought that router is exactly PC3;
Through after the above-mentioned ND Agent technical finesse, just normally intercommunication is the datagram of PC3 in case router is received destination between PC1 and the PC3, and router utilizes that the routing iinformation about PC3 is transmitted to PC3 with datagram in the routing table.Like this, the present invention solves the intercommunication problem under same IPv6 subnet, between the main frame of the different quarantine domain under the link layer isolated instances.
Claims (10)
1, a kind of neighbours of different link layer quarantine domain find implementation method, it is characterized in that: the binding relationship table of Internet protocol sixth version (IPv6) address, link layer address and quarantine domain label value is set, and the communication between the different quarantine domain main frames of realizing isolating by the link layer access device by following steps:
Main frame in A, the quarantine domain sends the hardware address that neighbor request message is searched other main frame;
After B, link layer access device receive this neighbor request message, insert this quarantine domain label value, this neighbor request message is passed to router;
C, router are inquired about the binding relationship table, if judge destination host and the main frame that sends neighbor request message not at same quarantine domain, and active response neighbor request message then, and the hardware address of router oneself is provided;
D, the main frame that sends neighbor request message are received the neighbor advertisement message from the router response, and sending destination to router is the datagram of described destination host;
After E, router are received this datagram, utilize the routing iinformation in the routing table that datagram is transmitted to this destination host.
2, the neighbours of different link layer quarantine domain according to claim 1 find implementation method, it is characterized in that: described binding relationship table is provided with in router and safeguards, generate by router study neighbor request message, or initiatively initiate the neighbor request inquiry by router and generate.
3, the neighbours of different link layer quarantine domain according to claim 1 find implementation method, it is characterized in that: each list item in the described binding relationship table also disposes ageing time, and described ageing time is carried out initialization when relevant entries is added the binding relationship table to.
4, the neighbours according to claim 1,2 or 3 described different link layer quarantine domain find implementation method, it is characterized in that: among the described step C, router is inquired about the binding relationship table, judges whether destination host is as follows in the step of same quarantine domain with the main frame that sends neighbor request message:
A, router parse IPv6 address, source, link layer address and quarantine domain label value and Target IP v6 address from described neighbor request message, according to source IPv6 address lookup binding relationship table;
If the b successful inquiring is then done consistency check to link layer address and quarantine domain label value; If consistent, then, enter step c according to Target IP V6 address lookup binding relationship table; If inconsistent, then finish the current processing of router to neighbor request message;
If c then obtains the quarantine domain label value according to Target IP v6 address lookup binding relationship telogenesis merit, the quarantine domain label value of router reference source IPv6 address correspondence and the quarantine domain label value of Target IP v6 address correspondence judge whether be in same quarantine domain.
5, the neighbours of different link layer quarantine domain according to claim 4 find implementation method, it is characterized in that: further comprise among the described step b, if, then in the binding relationship table, add relevant entries, and initialization ageing time according to the failure of source IPv6 address lookup binding relationship table.
6, the neighbours of different link layer quarantine domain according to claim 4 find implementation method, it is characterized in that: further comprise among the described step c, if fail according to Target IP v6 address lookup binding relationship table, then router initiatively sends the neighbor request message to this Target IP v6 address, wait acknowledge if receive neighbours' announcement message, is then obtained the quarantine domain label value, and in the binding relationship table, add relevant entries, the initialization ageing time.
7, the neighbours of different link layer quarantine domain according to claim 6 find implementation method, it is characterized in that: if do not receive neighbours' announcement message, then simply abandon neighbor request message, finish the current processing to neighbor request message of router.
8, the neighbours of different link layer quarantine domain according to claim 1 find implementation method, it is characterized in that: if among the described step C destination host with send the main frame of neighbor request message at same quarantine domain, then router simply abandons neighbor request message, finishes the current processing to neighbor request message of router.
9, the neighbours of different link layer quarantine domain according to claim 1 find implementation method, it is characterized in that: being connected between described link layer access device and the router adopted class link aggregation (Trunk) mode, guarantees that the quarantine domain label value is delivered to router.
10, the neighbours according to claim 1 or 9 described different link layer quarantine domain find implementation method, it is characterized in that: described link layer access device is a LAN switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB031783945A CN100493073C (en) | 2003-07-19 | 2003-07-19 | Method for implementing neighbor discovery of different link layer separated domain |
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| CNB031783945A CN100493073C (en) | 2003-07-19 | 2003-07-19 | Method for implementing neighbor discovery of different link layer separated domain |
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| CN1571423A true CN1571423A (en) | 2005-01-26 |
| CN100493073C CN100493073C (en) | 2009-05-27 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2007006195A1 (en) * | 2005-07-13 | 2007-01-18 | Alcatel | An access device routing decive and method thereof supporting stateless address configuration in communication network |
| WO2008098520A1 (en) * | 2007-02-14 | 2008-08-21 | Huawei Technologies Co., Ltd. | Security neighbor discovery method, network device and mobile station |
| CN100568852C (en) * | 2006-03-22 | 2009-12-09 | 中兴通讯股份有限公司 | The router of operation IS-ISv6 is set up the method for single topology syntople |
| CN100574205C (en) * | 2005-11-19 | 2009-12-23 | 腾讯科技（深圳）有限公司 | A kind of method of setting up instant communication network neighbor |
| CN101179603B (en) * | 2006-11-09 | 2011-06-08 | 上海贝尔阿尔卡特股份有限公司 | Method and device for controlling user network access in IPv6 network |
| CN102546308A (en) * | 2012-02-10 | 2012-07-04 | 神州数码网络(北京)有限公司 | Method and system for realizing neighbor discovery proxy based on duplicate address detection (DAD) |
| CN101527711B (en) * | 2008-03-06 | 2012-11-21 | 华为技术有限公司 | Method, device and system for detecting survival of IPv6 session |
| CN104618210A (en) * | 2014-12-25 | 2015-05-13 | 杭州华三通信技术有限公司 | Status notification method and device |
| CN107454000A (en) * | 2016-05-31 | 2017-12-08 | 华为技术有限公司 | Network data transmission device and method |
| CN112817975A (en) * | 2021-01-25 | 2021-05-18 | 惠州Tcl移动通信有限公司 | Method and system for setting physical memory and mobile terminal |
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- 2003-07-19 CN CNB031783945A patent/CN100493073C/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2007006195A1 (en) * | 2005-07-13 | 2007-01-18 | Alcatel | An access device routing decive and method thereof supporting stateless address configuration in communication network |
| US8655990B2 (en) | 2005-07-13 | 2014-02-18 | Alcatel Lucent | Access device routing device and method thereof supporting stateless address configuration communication network |
| CN1897589B (en) * | 2005-07-13 | 2010-12-15 | 上海贝尔阿尔卡特股份有限公司 | Access apparatus, routing equipment and method for supporting IPv6 stateless address configuration in telecommunication network |
| CN100574205C (en) * | 2005-11-19 | 2009-12-23 | 腾讯科技（深圳）有限公司 | A kind of method of setting up instant communication network neighbor |
| CN100568852C (en) * | 2006-03-22 | 2009-12-09 | 中兴通讯股份有限公司 | The router of operation IS-ISv6 is set up the method for single topology syntople |
| CN101179603B (en) * | 2006-11-09 | 2011-06-08 | 上海贝尔阿尔卡特股份有限公司 | Method and device for controlling user network access in IPv6 network |
| CN101247642B (en) * | 2007-02-14 | 2012-12-19 | 华为技术有限公司 | Safety neighbor discovering method, network appliance and mobile station |
| WO2008098520A1 (en) * | 2007-02-14 | 2008-08-21 | Huawei Technologies Co., Ltd. | Security neighbor discovery method, network device and mobile station |
| CN101527711B (en) * | 2008-03-06 | 2012-11-21 | 华为技术有限公司 | Method, device and system for detecting survival of IPv6 session |
| CN102546308A (en) * | 2012-02-10 | 2012-07-04 | 神州数码网络(北京)有限公司 | Method and system for realizing neighbor discovery proxy based on duplicate address detection (DAD) |
| CN102546308B (en) * | 2012-02-10 | 2015-10-07 | 神州数码网络(北京)有限公司 | The method and system of neighbor uni-cast agency is realized based on duplicate address detection |
| CN104618210A (en) * | 2014-12-25 | 2015-05-13 | 杭州华三通信技术有限公司 | Status notification method and device |
| CN104618210B (en) * | 2014-12-25 | 2018-07-31 | 新华三技术有限公司 | A kind of state notice method and equipment |
| CN107454000A (en) * | 2016-05-31 | 2017-12-08 | 华为技术有限公司 | Network data transmission device and method |
| CN107454000B (en) * | 2016-05-31 | 2021-01-05 | 华为技术有限公司 | Network data transmission device and method |
| CN112817975A (en) * | 2021-01-25 | 2021-05-18 | 惠州Tcl移动通信有限公司 | Method and system for setting physical memory and mobile terminal |
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Effective date of registration: 20211221 Address after: 450046 Floor 9, building 1, Zhengshang Boya Plaza, Longzihu wisdom Island, Zhengdong New Area, Zhengzhou City, Henan Province Patentee after: Super fusion Digital Technology Co.,Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |
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