Changing External VLAN to a Trunk (Cisco trunk) - No downtime
vlan External {
tag 4094
mac masq xx:xx:xx:xx:xx:xx
failsafe enable
failsafe failover
trunks external_trk
}
Does the plan below make sense? I don't expect any downtime other than the two failovers. What I'm concerned about is unexpected failovers. I ran into some trouble a while back when I made the bad assumption that I could change the management interface without affecting anything!
1. On unit 2 (standby), make the following changes to the External VLAN:
tag 200
trunks tagged external_trk
2. On the port channel on the switch connected to unit 2, change it from access mode to trunk mode.
3. Test connectivity to unit 2's self IP on the External VLAN.
4. Failover to unit 2.
5. Perform steps 1-3 on unit 1 (currently in standby).
6. Fail back to unit 1.
7. At this point, I can add an additional tagged VLAN on external_trk and setup the self/floating IPs. This is a normal action that can be done anytime for us.