1046119 - TCW Aug 9 -- complete removal of graceful-restart

Status: RESOLVED FIXED

(Infrastructure & Operations Graveyard :: NetOps, task)

Description

[Dave Curado :dcurado]

In our last maint work we learned that removing Graceful Restart (GR) causes
BGP to restart.  We removed GR from all the non-core network devices, but
decided to delay removing it from border routers holding full routes
and core switches until the TCW, as it will be a bit disruptive when
all the BGP sessions restart on any one of these devices.

Here's the list of devices from which we will delete GR:

fw1.corp.console.scl3.mozilla.net
fw1.corp.phx1.mozilla.net
fw1.phx1.mozilla.net
fw1.releng.scl3.mozilla.net
fw1.scl3.mozilla.net
fw1.svc.phx1.mozilla.net
border1.console.pao1.mozilla.net
border1.console.scl3.mozilla.net
border1.console.sjc2.mozilla.net
border1.phx1.mozilla.net
border2.console.scl3.mozilla.net
border2.phx1.mozilla.net
core1.corp.console.scl3.mozilla.net
core1.corp.phx1.mozilla.net
core1.svc.phx1.mozilla.net

Comment 1

[Dave Curado :dcurado]

Time required: 45 minutes
Impact: multiple brief disruptions as each device listed will clear all bgp sessions

Comment 2

[Dave Curado :dcurado]

work completed.
We actually left GR configured on border1.sjc2, to be deleted another day, as the convergence
time for this change is a killer.