BGP Router Identifier

Answered Question
Feb 13th, 2009
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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?

Correct Answer by Giuseppe Larosa about 8 years 3 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 8 years 3 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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Giuseppe Larosa Fri, 02/13/2009 - 08:22
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Hello Mohamad,


router bgp xx

bgp router-id x.y.z.k



Hope to help

Giuseppe


Mohamad Qayoom Fri, 02/13/2009 - 08:26
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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
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  • Cisco Employee,

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
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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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