On Sun, 28 Sep 2014, Nick Hilliard wrote:
On 25/09/2014 18:19, Randy wrote:
I'm tasked with moving a BGP session on a 6500 from a 1GE to a 10GE
interface (live environment). BGP session details are staying the same.
The BGP peer IPs (both v4 and v6) are assigned directly to the existing 1GE
interface (no SVI, ect).
Is it as simple/possible as configure the new interface with the same IP's
but in a shutdown state, move the x-connect, shut the old interface and
unshut the new interface? Or will IOS block me from doing this (two
interfaces with the same IP) -- in other words, the IPs will need to be
removed from the old interface first?
yes, they will need to removed.
Thanks for any advise or tips on keeping downtime / CLI work to a minimum :)
if BGP uses the address defined on an interface that you need to migrate,
you will have downtime on that bgp session. Standard best practice is to
block all inbound and outbound prefixes on the session, then gracefully
shut down the session, then migrate the interfaces, then bring bgp back up
again. If this is an ebgp session, you will briefly lose connectivity due
to your upstreams' non-zero MRAIs, so you will need to do this in a
scheduled maintenance window.
Wouldn't "even better practice" be to use new IPs on the new interface,
get the interface up, establish BGP (verify at both ends that routes are
sent/received/accepted), then shut the old session and relinquish the old
interface IPs? Done carefully, there should be no downtime.
----------------------------------------------------------------------
Jon Lewis, MCP :) | I route
| therefore you are
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
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