Does editing a pre-fix set for bgp in IOS-XR cause a loss of network connectivity

lkadlik · ‎02-11-2015

Hi,

I have to edit an existing prefix-set for bpg in ios-xr. When I went to do it the first time it told me it would wipe the existing information so I aborted the change.

I have since read that you need to redo the whole list and add the new network you want.

For example.

existing

pre-fix set TEST

10.10.10.0/24,

11.11.11.0/24

new

pre-fix set TEST

10.10.10.0/24, 11.11.11.0/24, 12.12.12.0/24

1st) is the above correct?

2nd) when this is done will there be any drops in connectivity?

Thank you.

eduardopozo56 · ‎02-11-2015

1) It is correct, when you create the new prefix-set with the same name as the old one, it overwrites the old one. Meaning that, it wont "append" to the old config, it creates a new prefix-set from scratch

2) Depends on where are you referencing the prefix-set. For example, on BGP route-policy, there wont be any drop on BGP connectivity, you might even have to do a soft refresh in and out to refresh the advertised/filtered routes