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Community Member

BGP Timers with VRF

Hi,

Just a quick one with regards to BGP Timers. As we all know its default Keepalives: 60 and Holdtime: 180 seconds.

I have the following config below setup on my network:

router bgp YYY
 bgp router-id 10.79.250.141
 bgp log-neighbor-changes
 neighbor 10.79.5.2 remote-as XXX
 neighbor 10.79.5.2 transport path-mtu-discovery
 neighbor 10.79.252.74 remote-as YYY
 neighbor 10.79.252.74 transport path-mtu-discovery
 !
 address-family ipv4
  redistribute connected
  neighbor 10.79.5.2 activate
  neighbor 10.79.5.2 send-community
  neighbor 10.79.5.2 soft-reconfiguration inbound
  neighbor 10.79.252.74 activate
  neighbor 10.79.252.74 send-community
  neighbor 10.79.252.74 soft-reconfiguration inbound
 exit-address-family
 !
 address-family ipv4 vrf admin
  redistribute connected
  neighbor 10.65.5.2 remote-as XXX
  neighbor 10.65.5.2 transport path-mtu-discovery
  neighbor 10.65.5.2 activate
  neighbor 10.65.5.2 send-community
  neighbor 10.65.5.2 soft-reconfiguration inbound
  neighbor 10.65.252.74 remote-as YYY
  neighbor 10.65.252.74 transport path-mtu-discovery
  neighbor 10.65.252.74 activate
  neighbor 10.65.252.74 send-community
  neighbor 10.65.252.74 soft-reconfiguration inbound
 exit-address-family
!
address-family ipv4 vrf av
  redistribute connected
  neighbor 10.78.5.2 remote-as XXX
  neighbor 10.78.5.2 transport path-mtu-discovery
  neighbor 10.78.5.2 activate
  neighbor 10.78.5.2 send-community
  neighbor 10.78.5.2 soft-reconfiguration inbound
  neighbor 10.78.252.74 remote-as YYY
  neighbor 10.78.252.74 transport path-mtu-discovery
  neighbor 10.78.252.74 activate
  neighbor 10.78.252.74 send-community
  neighbor 10.78.252.74 soft-reconfiguration inbound
 exit-address-family

 

Instead of me adding "neighbor x.x.x.x timer 30 90" on each peering neighbors, can I use "timers bgp 30 90" under the "router bgp 65258" to reflect to all address-family VRFs peering BGP neighbors?

If not, is there a global command to use to set the timers for all BGP session within the router?

 

Thanks

 

 

 

1 ACCEPTED SOLUTION

Accepted Solutions
Green

Hi again, Yes you have

Hi again,

 

Yes you have understood the concept.

 

Just set the timers after the bgp

!
router bgp 100
timers bgp 5 15 (Your own values)
!

 

This will set all neighbors to 5 15 unless you specifically set them in the neighbor statements

 

 

Hope this helps

Please grade useful posts

Regards

Alex

Regards, Alex. Please rate useful posts.
3 REPLIES
Green

Hi,The command !router bgp

Hi,

The command 

!
router bgp 100 
neighbor 192.168.100.254 timers 30 90
!

This overides the command set under the timers bgp

!
router bgp 100
timers bgp 5 15
!
address-family ipv4 vrf av
  redistribute connected
  neighbor 10.78.5.2 timers 30 90
  neighbor 10.78.5.2 remote-as XXX
 et etc etc
 exit-address-family

The result will be 30 90 for the vrf av neighbor but 5 15 for any others

See this link for more info
http://www.cisco.com/c/en/us/td/docs/ios/iproute_bgp/command/reference/irg_book.html

Regards
Alex

Regards, Alex. Please rate useful posts.
Community Member

Thanks Alex. So if I left it

Thanks Alex. So if I left it as using "timer bgp 5 15" and no neighbor x.x.x.x timers setup, this should take affect to all vrf/neighbors globally for that router?

Much appreciate your reply and link.

Green

Hi again, Yes you have

Hi again,

 

Yes you have understood the concept.

 

Just set the timers after the bgp

!
router bgp 100
timers bgp 5 15 (Your own values)
!

 

This will set all neighbors to 5 15 unless you specifically set them in the neighbor statements

 

 

Hope this helps

Please grade useful posts

Regards

Alex

Regards, Alex. Please rate useful posts.
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