How to configure BGP in IOS/XR

[Carl Williams]

Could somebody show me an example of how to configure BGP in IOS/XR.

[Richard Burts]

We do not have much information to work with. What do you want BGP to do? Do you want to connect to an ISP? Or to connect to something else? Or to connect to more than one outside neighbor? Am I correct in assuming that you want to learn some routes from the outside neighbor? Do you want to advertise any routes to your outside neighbor?

At a minimum you need two statements to configure BGP.

- you need the statement router bgp <AS#> where AS# is the Autonomous System number you will use. Probably you will want to use an AS number from the range of numbers reserved for private use. The neighbor to whom you connect may have some advice about what AS number you should use.

- neighbor <IP> <AS#> where IP is the IP address of the neighbor and AS is the Autonomous System Number of the neighbor.

What other commands may be needed depends on what you want to accomplish in BGP.

[Edson A. Hernandez]

I recommend you check these two links

https://fryguy.net/2012/09/24/ios-xr-ibgp-and-ebgp/

https://www.cisco.com/c/en/us/td/docs/routers/xr12000/software/xr12k_r3-9/routing/configuration/guide/xr12krc39_chapter1.html

[Sam Meftahi]

I suggest you take a look at these 2 videos:

https://youtu.be/avPkceRWmNY

https://youtu.be/BwLEe9sRi54

[M02@rt37]

Hello @Carl Williams,

Find here how to configure iBGP and eBGP with Cisco IOS XR:

https://community.cisco.com/t5/networking-knowledge-base/bgp-basic-configuration-on-ios-xr-ibgp-and-ebgp/ta-p/3145638