Pe device and method for advertising information about pe device

Patent metadata

Field	Value
Publication number	US-2016112255-A1
Application number	US-201514983153-A
Country	US
Kind code	A1
Filing date	Dec 29, 2015
Priority date	Jun 29, 2013
Publication date	Apr 21, 2016
Grant date	—

Abstract

Embodiments of the present application disclose a method for advertising information about a PE device and a related apparatus, which are applied to a BGP-based MVPN. The method includes: a PE device in the MVPN determines a role of the PE device in the MVPN and a working status corresponding to the role, where the role is a root node and/or a leaf node, and the working status is active or standby; the PE device generates a BGP update message, carrying an IP address of the PE device, an identifier of the MVPN, the role of the PE device, and the working status of the PE device; and the PE device sends the BGP update message to a BGP neighbor of the PE device in the MVPN. The method and apparatus may alleviate a configuration workload and reduce an error occurrence during an application of a BGP-based MVPN.

First claim

What is claimed is:

1 . A method for advertising information about a provider edge PE device, where the method is applied to a Border Gateway Protocol-based multicast virtual private network (BGP-based MVPN), the method comprising:
determining, by a first PE device in the MVPN, a role of the first PE device in the BGP-based MVPN and a working status corresponding to the role, wherein the role is at least one of a root node and a leaf node, and the working status is either active or standby; generating, by the first PE device, a BGP update message, wherein the BGP update message carries an IP address of the first PE device, an identifier of the BGP-based MVPN, and the role of the first PE device and the working status of the first PE device; and sending, by the first PE device, the BGP update message to a BGP neighbor of the first PE device in the BGP-based MVPN.

2 . The method according to claim 1 , wherein the BGP update message comprises:
first information indicating that the BGP update message carries the role of the first PE device and the working status of the first PE device; an RD of an instance of the BGP-based MVPN, wherein the instance of the BGP-based MVPN is on the first PE device, and the RD is used as the identifier of the BGP-based MVPN; the IP address of the first PE device.

3 . The method according to claim 2 , wherein:
the BGP update message comprises an IP address of a second PE device, and the second PE device is an active root node protected by the first PE device in the BGP-based MVPN; when the first PE device determines that the role of the first PE device is the root node and the working status of the first PE device is standby, the method further comprises: determining, by the first PE device, the IP address of the second PE device.

4 . The method according to claim 2 , wherein the BGP update message comprises:
second information indicating whether the BGP update message carries an IP address of a third PE device, and the third PE device is an active leaf node protected by the first PE device in the BGP-based MVPN; and when the first PE device determines that the role of the first PE device is the leaf node and the working status of the first PE device is standby, and the second information indicates that the BGP update message carries the IP address of the third PE device, the method further comprises: determining, by the first PE device, the IP address of the third PE device.

5 . The method according to claim 1 , further comprising:
receiving, by the first PE device, a message that carries an S-P-multicast service interface tunnel auto-discovery (S-PMSI A-D) route and is sent from a fourth PE device, wherein the fourth PE device is a root node in the BGP-based MVPN; wherein the BGP update message is used to respond to the message carrying the S-PMSI A-D route, and the BGP update message comprises: third information indicating that the role of the first PE device is the leaf node, and that the BGP update message carries the working status of the first PE device.

6 . The method according to claim 4 , wherein the first PE device determines that the role of the first PE device is the leaf node and the working status of the first PE device is standby, and the method further comprises:
determining, by the first PE device, an IP address of a fifth PE device, wherein the fifth PE device is an active leaf node protected by the first PE device in the BGP-based MVPN and the BGP update message further comprises the IP address of the fifth PE device.

7 . The method according to claim 1 , wherein the determining, by a first PE device in the BGP-based MVPN, a role of the first PE device in the BGP-based MVPN and a working status corresponding to the role comprises:
receiving, by the first PE device, configuration information, wherein the configuration information is used to specify the role of the first PE device and the working status corresponding to the role; and determining, by the first PE device according to the configuration information, the role of the first PE device and the working status corresponding to the role.

8 . A first provider edge (PE) device, applied to a Border Gateway Protocol-based multicast virtual private network (BGP-based MVPN), the PE device comprising:
a processor, configured to:
determine a role of the first PE device in the BGP-based MVPN and a working status corresponding to the role, wherein the role is at least one of a root node and a leaf node, and the working status is either active or standby, and
generate a BGP update message, wherein the BGP update message carries an IP address of the first PE device, an identifier of the BGP-based MVPN, and the role of the first PE device and the working status of the first PE device; and
a network interface, configured to send the BGP update message to a BGP neighbor of the first PE device in the BGP-based MVPN.

9 . The first PE device according to claim 8 , wherein:
the BGP update message comprises first information indicating that the BGP update message carries the role of the first PE device and the working status of the first PE device; an RD of an instance of the BGP-based MVPN, wherein the instance of the MVPN is on the first PE device, and the RD is used as the identifier of the BGP-based MVPN; the IP address of the first PE device.

10 . The first PE device according to claim 9 , wherein:
the BGP update message comprises an IP address of a second PE device, and the second PE device is an active root node protected by the first PE device in the BGP-based MVPN; when the processor determines that the role of the first PE device is the root node and the working status of the first PE device is standby, the processor is configured to determine the IP address of the second PE device.

11 . The first PE device according to claim 9 , wherein the BGP update message comprises:
second information indicating whether the BGP update message carries an IP address of a third PE device, and the third PE device is an active leaf node protected by the first PE device in the BGP-based MVPN; and when the processor determines that the role of the first PE device is the leaf node and the working status of the first PE device is standby, and the second information indicates that the BGP update message carries the IP address of the third PE device, the processor is configured to determine the IP address of the third PE device.

12 . The first PE device according to claim 8 , further comprising:
a receiving unit, configured to receive a message that carries an S-P-multicast service interface tunnel auto-discovery (S-PMSI A-D) route and is sent from a fourth PE device, wherein the fourth PE device is a root node in the BGP-based MVPN; the BGP update message is used to respond to the message carrying the S-PMSI A-D route, and the BGP update message comprises third information indicating that the role of the first PE device is the leaf node, and that the BGP update message carries the working status of the first PE device.

13 . The first PE device according to claim 12 , where the processor is configured to:
when the processor determines that the role of the first PE device is the leaf node and the working status of the first PE device is standby, determine an IP address of a fifth PE device, wherein the fifth PE device is an active leaf node protected by the first PE device in the BGP-based MVPN; the BGP update message further comprises the IP address of the fifth PE device.

14 . The first PE device according to claim 8 , where the processor is configured to:
receive configuration information, wherei

Assignees

• Huawei Tech Co Ltd

Inventors

• Li Zhenbin

Classifications

• H04L12/4641

  Virtual LANs, VLANs, e.g. virtual private networks [VPN] (LAN interconnection over a bridge based backbone H04L12/462; encapsulation techniques H04L12/4633; routing of packets H04L45/00; packet switches H04L49/00; virtual private networks for security H04L63/0272) · CPC title

• H04L12/1886

  with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains · CPC title

• H04L45/66

  Layer 2 routing, e.g. in Ethernet based MAN's · CPC title

• H04L12/4675

  Dynamic sharing of VLAN information amongst network nodes (configuration of the network or of network elements H04L41/08) · CPC title

• H04L41/0803 Primary

  Configuration setting · CPC title