BGP Neighbor Shutdown

[GRANT3779]

Hi CSC,

Under my BGP process, is there a way to shutdown all my different eBGP neighbors at once, whilst leaving my iBGP neighbors up?

I believe I can see a way to shutdown all neighbors but is this taking down all iBGPs also?

[Jon Marshall · Accepted solution]

You would need to use peer groups ie. you assign all the EBGP neighbors to a peer group and then - 

"neighbor <peer group name> shutdown" 

Jon

[Georg Pauwen · Accepted solution]

Hello,

put all your eBGP neighbors in a peer group:

router bgp 1
bgp router-id 1.1.1.1
neighbor eBGP peer-group
neighbor 192.168.12.2 remote-as 2
neighbor 192.168.12.2 peer-group eBGP
neighbor 192.168.13.3 remote-as 3
neighbor 192.168.13.3 peer-group eBGP

When you issue the command:

neighbor eBGP shutdown

all routers in the peer group will be shut...

[GRANT3779]

Thanks both,
So under my BGP process I had a look just to see this but I do not see peer-group option to shutdown? Or is it the "TAG"?

EDGE-TEST(config-router)#neighbor ?
A.B.C.D Neighbor address
WORD Neighbor tag
X:X:X:X::X Neighbor IPv6 address

Or do I need to create the peer-group first before it will the option appears?

[Georg Pauwen]

Hello,

the tag is the peer group name.

If you type:

EDGE-TEST(config-router)#neighbor EBGP

and then enter the '?' the next option will be 'peer-group'. Once the peer group is created, you can type:

neighbor EBGP shutdown

[GRANT3779]

So I currently use policy templates (peer-sessions, peer-policy). Is this "the newer" way forward?

Can I use template as the "tag" to shutdown all peers that have a specific peer-session template applied? e.g
template peer-session Test-eBGP
neighbor Test-eBGP shutdown

I read that i cannot use peer groups and peer templates in the same neighbor configuration?
Thanks all

[Georg Pauwen]

Hello,

you can also configure an EEM script to achieve the same result:

event manager applet SHUT_EBGP
event none
action 1.0 cli command "enable"
action 2.0 cli command "conf t"
action 3.0 cli command "router bgp 1"
action 4.0 cli command "neighbor 192.168.12.2 shut"
action 5.0 cli command "neighbor 192.168.13.3 shut"
action 6.0 cli command "end"
action 7.0 puts "$_cli_result"

Run this script from the exec prompt:

Router#event manager run SHUT_EBGP