Got it

reflect change-path-attribute Highlighted

Latest reply: Nov 27, 2018 06:21:23 2827 5 7 0 0

【Problem Description】

have some question about Huawei NE40 BGP Configuration. 

Due to BGP route reflectors cannotchange any attribute of the routes they reflect.

1
From the picture, Prefix : 50.50.50.0/24 originated by PE-A is propogated by Route Reflector to PE-B.


PE-B shown that BGP next hop to 50.50.50.0/24 is 1.1.1.1 (PE-A).


If we need to modify next hop attributes that are learned from iBGP Peers (PE-A) to 20.20.20.2 (RouteReflector) and allow traffic from PE-B to 50.50.50.0/24 across the Route Reflector.


Please suggest us for  NE40 Configuration ?


On Cisco Device,We used “next-hop-self all “ to change the NHattributes that learn from iBGP and eBGP to our reflect clients.


【Problem Analysis】

 

Please refer to command “reflect change-path-attribute” as follow document.

 

http://support.huawei.com/hedex/pages/EDOC100008314230006020/07/EDOC100008314230006020/07/resources/vrp/reflect_change-path-attribute.html?ft=0&fe=10&hib=8.1.11.8.164&id=reflect_change-path-attribute&text=reflect%20change-path-attribute&docid=EDOC1000083142

 

  1. Applythis command in bgp AS

  2. Configureroute-policy and apply for peer

2

Please refer to this.

 

If you configure theip-address next-hop with “peer-address” parameter and apply the router-policyfor peer PE-B (peer 2.2.2.2), then the next-hop address is the local-address ofRR 20.20.20.2.

 

This article contains more resources

You need to log in to download or view. No account? Register

x
  • x
  • convention:

yjhd
Created Nov 6, 2018 07:50:44

  • x
  • convention:

GongXiaochuan
Created Nov 6, 2018 08:01:40

  • x
  • convention:

limgsc
Created Nov 6, 2018 09:44:25

your document is work for me , i get the point , fix my issue by your doc thanks you very much ,
also hope you public more doc that levle like this .
would you please also mention where from the technical detail , i can found it from orignial part .
from orignial part i can found more correct parameter , this is more important .
View more
  • x
  • convention:

Torrent
Created Nov 15, 2018 07:10:20

The reflect change-path-attribute command enables an route-reflector (RR) to modify the route attributes of BGP routes using the export policy.

The undo reflect change-path-attribute command disables an RR from modifying the route attributes of BGP routes using the export policy.

By default, an RR is disabled from modifying route attributes of BGP routes using the export policy.

is this right?
View more
  • x
  • convention:

littlestone
Created Nov 27, 2018 06:21:23

As path is a list sequence of as, indicating that the shorter the AS that arrives at the network, the better. This IP used for router routing optimization uses the next hop property to reach the next hop of the destination network.
View more
  • x
  • convention:

Comment

You need to log in to comment to the post Login | Register
Comment

Notice: To protect the legitimate rights and interests of you, the community, and third parties, do not release content that may bring legal risks to all parties, including but are not limited to the following:
  • Politically sensitive content
  • Content concerning pornography, gambling, and drug abuse
  • Content that may disclose or infringe upon others ' commercial secrets, intellectual properties, including trade marks, copyrights, and patents, and personal privacy
Do not share your account and password with others. All operations performed using your account will be regarded as your own actions and all consequences arising therefrom will be borne by you. For details, see " User Agreement."

My Followers

Login and enjoy all the member benefits

Login

Block
Are you sure to block this user?
Users on your blacklist cannot comment on your post,cannot mention you, cannot send you private messages.
Reminder
Please bind your phone number to obtain invitation bonus.