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Webcast-Catalyst9k
New Member

loopback interface on BPG

hi guys,

I just want to ask if changing my loopback address has a great effect on my network,specificall on my bgp process. I have this lo with an ip address of my previous provider. Having a new provider now, i want to change this lo. can i put any ip address on this one ? or can i use my interface address for this one. i tried to check my bgp config and my router id shows that im using this lo.

tnx

3 REPLIES
Purple

Re: loopback interface on BPG

Hi,

Changing the address on that loopback interface will not have any impact on the router ID currently in use for BGP and OSPF. The BGP/OSPF process only selects a router ID when it starts. Even if the address changes, the process continues to use the ID it started with.

Pls do remember to rate posts.

Paresh

New Member

Re: loopback interface on BPG

Hi,

In addition i have iBGP config on my gateway router to my core router. Can i use any ip address on my network for these one ? What is the usual thing to do ?

Purple

Re: loopback interface on BPG

Jeff,

The typically recommendation is to peer using loopback addresses for iBGP and interface addresses for eBGP.

Pls do remember to rate posts.

Paresh

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