BGP Router Identifier

Answered Question
Feb 13th, 2009

We recently changed an interface IP address, which was being used as router ID. What do we need to do to make the router ID use this new interface IP address?

I have this problem too.
0 votes
Correct Answer by Giuseppe Larosa about 7 years 11 months ago

Hello Mohamad,

the BGP router-id is picked up when the BGP process starts.

copy the BGP router config to a notepad.

type

no router bgp xx

then copy paste the config a new BGP router-id is chosen

I recommend to use bgp router-id to be sure that BGP router-id will be the same over time.

Hope to help

Giuseppe

Correct Answer by Harold Ritter about 7 years 11 months ago

Mohamad,

You can reset the BGP process by going into configuration mode, typing a "no router bgp ", exiting the configuration mode and then typing config mem so that BGP config is re-applied. Note that this is obviously intrusive though.

Regards

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Overall Rating: 4.5 (2 ratings)
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Mohamad Qayoom Fri, 02/13/2009 - 08:26

Hi Giuseppe,

I don't want to use "bgp router-id" command. How can the router use the highest IP address of a new interface as default router-id?

Correct Answer
Harold Ritter Fri, 02/13/2009 - 08:33

Mohamad,

You can reset the BGP process by going into configuration mode, typing a "no router bgp ", exiting the configuration mode and then typing config mem so that BGP config is re-applied. Note that this is obviously intrusive though.

Regards

Correct Answer
Giuseppe Larosa Fri, 02/13/2009 - 08:35

Hello Mohamad,

the BGP router-id is picked up when the BGP process starts.

copy the BGP router config to a notepad.

type

no router bgp xx

then copy paste the config a new BGP router-id is chosen

I recommend to use bgp router-id to be sure that BGP router-id will be the same over time.

Hope to help

Giuseppe

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