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BGP Router Identifier

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Mohamad Qayoom
Level 3
Level 3

‎02-13-2009 08:15 AM - edited ‎03-04-2019 03:33 AM

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?

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Harold Ritter
Cisco Employee
Cisco Employee
In response to Mohamad Qayoom

‎02-13-2009 08:33 AM

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

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

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Giuseppe Larosa
Hall of Fame
Hall of Fame
In response to Mohamad Qayoom

‎02-13-2009 08:35 AM

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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5 Replies 5

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Giuseppe Larosa
Hall of Fame
Hall of Fame

‎02-13-2009 08:22 AM

Hello Mohamad,

router bgp xx

bgp router-id x.y.z.k

Hope to help

Giuseppe

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Mohamad Qayoom
Level 3
Level 3
In response to Giuseppe Larosa

‎02-13-2009 08:26 AM

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?

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Harold Ritter
Cisco Employee
Cisco Employee
In response to Mohamad Qayoom

‎02-13-2009 08:33 AM

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

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
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Mohamad Qayoom
Level 3
Level 3
In response to Harold Ritter

‎02-13-2009 08:38 AM

Thanks. I'll give it a shot.

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Go to solution
Giuseppe Larosa
Hall of Fame
Hall of Fame
In response to Mohamad Qayoom

‎02-13-2009 08:35 AM

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

0 Helpful
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