Device: ssw1-e1-eqiad
When: Tues Jun 4th 2024, 15:00 UTC
Downtime: 15-30 minutes
As discussed in the parent task we need to upgrade all our QFX5120 devices in Ashburn to a more recent JunOS to overcome some bugs and use newer features.
This Spine-layer switches can mostly be done without affecting servers, top-of-rack switches in each rack are connected to both, so we can upgrade one at a time. The exception to this is the connections from LVS servers in **remote racks**, so in this case LVS servers in rows A-D which have connections to the Spine switches in rows E and F to connect to back-end servers in those racks.
On ssw1-e1-eqiad we have the following connections from LVS servers:
lvs1017 enp94s0f0np0
lvs1018 enp94s0f0np0
I'd propose we disable PyBal on these servers in advance of the upgrade, which will push traffic they handle over to lvs1020, which has connectivity to the row E/F vlans through ssw1-f1-eqiad. Once the upgrade is complete we can re-enable PyBal on the above two hosts.