CN108521336B - Method and device for controlling IP address conflict of routing networking - Google Patents

Method and device for controlling IP address conflict of routing networking Download PDF

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CN108521336B
CN108521336B CN201810179673.6A CN201810179673A CN108521336B CN 108521336 B CN108521336 B CN 108521336B CN 201810179673 A CN201810179673 A CN 201810179673A CN 108521336 B CN108521336 B CN 108521336B
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address
message
remote
list
conflicts
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CN108521336A (en
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刘攀
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Fiberhome Telecommunication Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0631—Management of faults, events, alarms or notifications using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/74—Address processing for routing
    • H04L45/745—Address table lookup; Address filtering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5046—Resolving address allocation conflicts; Testing of addresses

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention discloses a method and a device for controlling IP address conflict of routing networking, wherein the method comprises the following steps: when a session is established, a remote address message list is established at the same time, and address messages sent by a local terminal and an opposite terminal are stored; the LSR receiving the address message detects whether the address carried by the address message conflicts with the IP address of the networking equipment by using the remote address message list and the local interface address list of each session, and informs the address message sending end if the address carried by the address message conflicts with the IP address of the networking equipment. The invention manages the remote interface address of the received address message by establishing the remote address message list, completes the detection of the IP address conflict of the routing network in the process of establishing the session negotiation of the LDP and sending the address message mutually, and does not depend on the specific enabled routing protocol, thereby not only improving the efficiency of MPLS LDP, but also enhancing the flexibility of configuration.

Description

Method and device for controlling IP address conflict of routing networking
Technical Field
The invention relates to data and IP transmission equipment, in particular to a method and a device for controlling IP address conflict of routing networking.
Background
In MPLS (Multiprotocol Label Switching) LDP (Label Distribution Protocol), link characteristics and topology information of a network are generated by calculation of a routing Protocol, and are sent to a LDP Protocol module after being preferentially routed by a routing management module, and according to received routing information and an opposite-end address message list, the LDP associates the routing information with an LDP session (LDP session), and initiates an LDP Label advertisement message to generate an LDP LSP (Label Switched path).
In general, in the process of LSP establishment, after a new LDP Session is established, an LSR (Label Switching router) should notify all interface addresses to an opposite end through an Address Message (Address Message) before sending a Label Mapping Message or a Label Request Message (Label Mapping or Label Request messages) to an opposite end device (PEER); upon receipt of the address message, the PEER maintains a database of LDP Identifiers PEER LDP ID and next hop addresses (next hop addresses).
The above-mentioned way of generating LSP using LDP protocol must ensure the uniqueness of IP address configuration in the routing group network, so that the next hop address through the route can be correctly associated with the correct session (session) in the address message list, and the collision of IP addresses in the routing group network is detected without warning, so that it is difficult to ensure the uniqueness of IP address configuration, which will cause the next hop address that cannot pass through the route to be associated with the correct session in the address message list, thereby affecting the problems such as establishment of LDP label switched path.
Disclosure of Invention
The invention aims to solve the technical problems that the IP address conflict is detected without alarm in a routing protocol networking, the uniqueness of IP address configuration is difficult to ensure, the next hop address of a route cannot be associated to a correct session in an address message list, and the establishment of an LDP label switching path and the like is influenced.
In order to solve the above technical problem, the technical solution adopted by the present invention is to provide a method for controlling a routing networking IP address conflict, specifically:
establishing a session, establishing a remote address message list, and storing address messages mutually transmitted by a local terminal and an opposite terminal;
the LSR receiving the address message detects whether the address carried by the address message conflicts with the IP address of the networking equipment by using the remote address message list and the local interface address list of each session, and informs the address message sending end if the address carried by the address message conflicts with the IP address of the networking equipment.
In the method, the LSR receiving the address message compares the address carried by the address message with each address in a remote address message list and a local interface address list of each session, and if the addresses are the same, the address of the address message conflicts with the IP address of the networking equipment; otherwise, there is no conflict.
In the method, when the address of the address message conflicts with the IP address of the networking equipment, the system alarm log informs the sending address message terminal that the address in the address message conflicts with the local interface address or conflicts with the interface addresses of other remote equipment in the networking equipment.
In the above method, the LSR detects whether an address carried by an address message conflicts with an IP address of a networking device by using a remote address message list and a local interface address list of each session, and specifically includes the following steps:
step S11, after receiving the address message, the LSR adds the address of the address message to the remote address message list of the corresponding conversation;
step S12, comparing the addresses of the address messages with each address in the remote address message list of different sessions in sequence, judging whether the same address exists, if so, executing step S14; otherwise, go to step S13;
step S13, comparing the address of the address message with the local interface address list, judging whether the same address exists, if yes, executing step S14; otherwise, go to step S15;
step S14, printing conflicting IP addresses and device identification information of corresponding sessions through a system alarm log;
and step S15, returning to wait for the next received address message.
In the method, when receiving an address revocation message of an opposite terminal, the address revocation operation is carried out, and the address carried by the address revocation message is deleted in a far-end address message list of different sessions.
In the above method, the address revocation operation performed by the LSR specifically includes the following steps:
step S21, receiving an address revocation message of an opposite terminal;
step S22, LSR takes out each revocation address in the received address revocation message in turn;
step S23, searching whether a node with the same withdrawal address exists in the remote address message list of different sessions, and if so, executing step S24; otherwise, go to step S25;
step S24, deleting the address of the node with the same revocation address in the remote address message list;
step S25, judging whether all the revocation addresses in the address revocation message are taken out, if all the revocation addresses are taken out, executing step S26; otherwise, go to step S22;
and step S26, ending the address revocation operation.
The invention also provides a device for controlling the IP address conflict of the routing networking, which comprises an LSR configured with the LDP conversation, and the LSR is provided with the following modules:
the remote interface address management module is used for establishing a corresponding remote address message list for the new session and storing address messages mutually sent by a local terminal and an opposite terminal; detecting whether the address carried by the received address message conflicts with the IP address of the networking equipment or not by using a remote address message list of each session, and reporting to the LSR if the address carried by the received address message conflicts with the IP address of the networking equipment; informing a sending address message end by the LSR;
the local interface address management module detects whether the address carried by the received address message conflicts with the IP address of the networking equipment by using a local interface address list, and reports the address to the LSR if the address carried by the received address message conflicts with the IP address of the networking equipment; and informing a message sending address end by the LSR.
In the device, the remote interface address management module compares the address carried by the received address message with each address in the remote address message list of each session, and if the addresses are the same, the address of the address message conflicts with the IP address of the networking equipment; otherwise, no conflict exists;
the local interface address management module compares the address carried by the received address message with each address in the local interface address list, and if the address carried by the received address message has the same address, the address of the address message conflicts with the IP address of the networking equipment; otherwise, there is no conflict.
In the above apparatus, when the address of the address message conflicts with the IP address of the networking device:
and the LSR informs a sending address message end through a system alarm log, and informs that the address in the address message conflicts with the interface addresses of other remote devices in the network or the local interface addresses.
In the above device, when receiving an address revocation message of an opposite terminal, the remote interface address management module deletes an address carried by the address revocation message in a remote address message list of different sessions.
The invention completes the IP address conflict detection in the routing group network in the process of establishing LDP session negotiation and mutually sending address messages by carrying out remote interface address management on the received address messages, can accurately appoint specific IP address configuration conflict in MPLS LDP application, does not depend on a specific enabled routing protocol, not only improves the efficiency of MPLS LDP, but also enhances the flexibility of configuration, is applied to the mixed network of the routing protocol, and expands the application range of the prior art.
Drawings
Fig. 1 is a specific flowchart of a method for controlling routing networking IP address collision according to the present invention.
FIG. 2 is a detailed flow chart of the present invention for performing address retraction;
fig. 3 is a block diagram of a device for controlling IP address collision of the routing network according to the present invention.
Detailed Description
The invention starts from special application of routing protocol hybrid networking, and realizes the IP address conflict detection function aiming at interface addresses configured by different devices under the application scene of MPLS LDP, thereby controlling the IP address configuration conflict of routing networking.
The invention is described in detail below with reference to the figures and specific examples.
The invention provides a method for controlling IP address conflict of routing networking, which supports the detection of address configuration conflict between a certain router configured with LDP session and other routers establishing session with the router in the networking. In an MPLS LDP application scenario, if a corresponding remote address message list is established for each session, the remote address message list of each session can be used to implement IP address collision detection of the whole routing networking, specifically:
after the session is established, the local terminal and the opposite terminal need to send address messages to each other, a remote address message list for storing the address messages is established, and the global remote address is managed through the remote address message list;
the LSR receiving the address message detects whether the address carried by the address message conflicts with the IP address of the networking equipment by using the remote address message list and the local interface address list of each session, and informs the address message sending end if the address carried by the address message conflicts with the IP address of the networking equipment.
It can be seen that the invention completes the IP address conflict detection in the routing network in the process of the LDP session negotiation establishment and mutual address message sending, the LSR carries out the global address management after receiving the address message, and whether the conflict IP address exists can be quickly searched through the global address management.
The first embodiment.
In this embodiment, the LSR that receives the address message compares the address carried by the address message with each address in the remote address message list and the local interface address list of each session, and if the addresses have the same address, the address of the address message conflicts with the IP address of the networking device; otherwise, there is no conflict.
Example two.
When the address of the address message conflicts with the IP address of the networking equipment, the system alarm log informs the sending address message terminal that the address in the address message (the address is only the address where the conflict occurs) conflicts with the local interface address or conflicts with the interface addresses of other remote equipment in the networking equipment.
Example three.
As shown in fig. 1, in this embodiment, the LSR detects whether an address carried by an address message conflicts with an IP address of a networking device by using a remote address message list and a local interface address list of each session, and specifically includes the following steps:
step S11, after receiving the address message, the LSR adds the address of the address message to the remote address message list of the corresponding session;
step S12, sequentially fetching the address of the address message, comparing with the remote address message list of different sessions, judging whether the remote address message list has the same address with the address message, if yes, indicating that the IP address configuration in the network conflicts, and executing step S14; otherwise, go to step S13;
s13, comparing the address of the address message with each address in the local interface address list, judging whether the same address exists, if so, indicating that the address configured by the terminal conflicts with the local interface address, and executing S14; otherwise, go to step S15;
step S14, printing the conflicted IP address (one address in the address message) and the equipment identification information of the corresponding session through the system alarm log;
and step S15, returning to wait for the next received address message.
Example four.
In this embodiment, when receiving an Address revocation message (Address with Address message Address revocation message) of the opposite end, the LSR performs an Address revocation operation, and deletes an Address carried by the Address revocation message in a remote Address message list of different sessions.
Example five.
As shown in fig. 2, in this embodiment, the address revocation operation performed by the LSR specifically includes the following steps:
step S21, receiving an address revocation message of an opposite terminal;
step S22, LSR takes out each revocation address in the received address revocation message in turn;
step S23, searching whether a node with the same withdrawal address exists in the remote address message list of different sessions, and if so, executing step S24; otherwise, go to step S25;
step S24, deleting the address of the node with the same revocation address in the remote address message list;
step S25, judging whether all the revocation addresses in the address revocation message are taken out, if all the revocation addresses are taken out, executing step S26; otherwise, go to step S22;
and step S26, ending the address revocation operation.
As shown in fig. 3, the apparatus for controlling IP address collision of routing networking provided by the present invention includes an LSR10 configuring LDP session, where a remote interface address management module 11 and a local interface address management module 12 are disposed on an LSR 10;
the remote interface address management module 11 establishes a corresponding remote address message list for the new session, and stores address messages mutually sent by the local terminal and the opposite terminal; detecting whether the address carried by the received address message conflicts with the IP address of the networking equipment or not by using a remote address message list of each session, and reporting to the LSR10 if the address carried by the received address message conflicts with the IP address of the networking equipment; the LSR10 informs the message end of the sending address;
the local interface address management module 12 detects whether the address carried by the received address message conflicts with the IP address of the networking device by using the local interface address list, and reports the address to the LSR10 if the address carried by the received address message conflicts with the IP address of the networking device; the sending address message side is informed by LSR 10.
Example six.
In this embodiment, the remote interface address management module 11 compares the address carried by the received address message with each address in the remote address message list of each session, and if the addresses have the same address, the address of the address message conflicts with the IP address of the networking device; otherwise, no conflict exists;
the local interface address management module 12 compares the address carried by the received address message with each address in the local interface address list, and if the address carried by the received address message has the same address, the address of the address message conflicts with the IP address of the networking device; otherwise, there is no conflict.
When the address of the address message conflicts with the IP address of the networking device:
the LSR10 informs the sending address message end through the system alarm log that there is a conflict between the address in the address message and the interface address of other remote devices in the group network or a local interface address conflict.
When receiving an address revocation message of an opposite terminal, the remote interface address management module 11 deletes an address carried by the address revocation message in a remote address message list of different sessions.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A method for controlling IP address conflict of routing networking is characterized by comprising the following steps:
establishing a session, establishing a remote address message list, and storing address messages mutually transmitted by a local terminal and an opposite terminal;
the label switching router LSR receiving the address message detects whether the address carried by the address message conflicts with the IP address of the networking equipment by using the remote address message list and the local interface address list of each session, and informs a sending address message end if the address carried by the address message conflicts with the IP address of the networking equipment;
after receiving the address message, the LSR adds the address of the address message to a remote address message list corresponding to the session; and sequentially extracting the address of the address message, comparing the address with each address in the remote address message lists of different sessions, and judging whether the same address exists or not.
2. The method of claim 1, wherein the LSR that receives the address message compares the address message carrying the address with each of the remote address message list and the local interface address list for each session, and if there is the same address, the address of the address message conflicts with the IP address of the networking device; otherwise, there is no conflict.
3. The method of claim 2, wherein when the address of the address message conflicts with the IP address of the networking device, the sending address message end is notified through a system alarm log that the address in the address message conflicts with the local interface address or conflicts with the interface address of other remote devices in the networking device.
4. The method of claim 3, wherein the LSR detects whether the address carried by the address message conflicts with the IP address of the networking device by using the remote address message list and the local interface address list of each session, and specifically comprises the following steps:
step S11, after receiving the address message, the LSR adds the address of the address message to the remote address message list of the corresponding conversation;
step S12, comparing the addresses of the address messages with each address in the remote address message list of different sessions in sequence, judging whether the same address exists, if so, executing step S14; otherwise, go to step S13;
step S13, comparing the address of the address message with each address in the local interface address list, judging whether the same address exists, if yes, executing step S14; otherwise, go to step S15;
step S14, printing conflicting IP addresses and device identification information of corresponding sessions through a system alarm log;
and step S15, returning to wait for the next received address message.
5. The method according to any of claims 1-4, characterized in that when receiving the address revocation message of the opposite terminal, performing the address revocation operation to delete the address carried by the address revocation message in the remote address message list of different sessions.
6. The method of claim 5, wherein the LSR performing the address retraction operation specifically comprises the steps of:
step S21, receiving an address revocation message of an opposite terminal;
step S22, LSR takes out each revocation address in the received address revocation message in turn;
step S23, searching whether a node with the same withdrawal address exists in the remote address message list of different sessions, and if so, executing step S24; otherwise, go to step S25;
step S24, deleting the address of the node with the same revocation address in the remote address message list;
step S25, judging whether all the revocation addresses in the address revocation message are taken out, if all the revocation addresses are taken out, executing step S26; otherwise, go to step S22;
and step S26, ending the address revocation operation.
7. An apparatus for controlling routing networking IP address collision, comprising a Label Switching Router (LSR) configured with a Label Distribution Protocol (LDP) session, characterized by further comprising the following modules disposed on the LSR:
the remote interface address management module is used for establishing a corresponding remote address message list for the new session and storing address messages mutually sent by a local terminal and an opposite terminal; detecting whether the address carried by the received address message conflicts with the IP address of the networking equipment or not by using a remote address message list of each session, and reporting to the LSR if the address carried by the received address message conflicts with the IP address of the networking equipment; informing a sending address message end by the LSR;
the local interface address management module detects whether the address carried by the received address message conflicts with the IP address of the networking equipment by using a local interface address list, and reports the address to the LSR if the address carried by the received address message conflicts with the IP address of the networking equipment; and informing a message sending address end by the LSR.
8. The apparatus of claim 7, wherein the remote interface address management module compares the address carried by the received address message with each address in the remote address message list of each session, and if the addresses have the same address, the address of the address message conflicts with the IP address of the networking device; otherwise, no conflict exists;
the local interface address management module compares the address carried by the received address message with each address in the local interface address list, and if the address carried by the received address message has the same address, the address of the address message conflicts with the IP address of the networking equipment; otherwise, there is no conflict.
9. The apparatus of claim 7, wherein when the address of the address message conflicts with an IP address of a networking device:
and the LSR informs a sending address message end through a system alarm log, and informs that the address in the address message conflicts with the interface addresses of other remote devices in the network or conflicts with the local interface address.
10. The apparatus of claim 7, wherein when receiving an address revocation message of a peer, the remote interface address management module deletes an address carried in the address revocation message in a remote address message list of a different session.
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