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Eqiad C/D refresh: move legacy switch uplinks to Nokias and migrate Vlan GWs
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Description

This is a high-level task to track the work to bring our new Nokia switches into the traffic path. At the end of this process the Nokias should be acting as the L3 gateway for the existing Vlans in Eqiad rows C/D, and those vlans will exist across the existing Juniper virtual-chassis devices and their Nokia replacements.

This will leave us in a position where a host can be connected either to the Juniper or the Nokia on the same Vlan, allowing us to begin the work of migrating server connections from the old to the new switches.

The high-level outline of the steps we will follow are documented on Wikitech here:

https://wikitech.wikimedia.org/wiki/Migrate_from_VC_switch_stack_to_EVPN

Event Timeline

cmooney triaged this task as Medium priority.

@Jclark-ctr @VRiley-WMF I may have missed to check we have the cables needed for these already. We're re-using exsiting ports so they need to be cabled during the migrations, which is why they weren't on the other Nokia cabling list.

Optics should be no problem, we can take the module from the CR side and re-use it in the Nokia when we do the moves. But I'm unsure if the existing cables will be long enough (or maybe too long/impractical) to reach from the asw's to the spines. These are the moves in question:

ASW Side (not moving)Currently connected toNeeds to move to
asw2-c2-eqiad et-2/0/53cr1-eqiad et-1/1/0ssw1-d1-eqiad ethernet-1/28
asw2-c7-eqiad et-7/0/53cr2-eqiad et-1/10ssw1-d8-eqiad ethernet-1/28
asw2-d2-eqiad et-2/0/49cr1-eqiad et-1/1/3ssw1-d1-eqiad ethernet-1/29
asw2-d7-eqiad et-7/0/53cr2-eqiad et-1/1/3ssw1-d8-eqiad ethernet-1/29

Cables need to be pink MPO multi-mode ones like this. Can I ask you check and if you think we need to order different cables for it raise a procurement task to order them? Thanks.

@cmooney if you can get link for fs and open. ticket tomorrow and assign to @RobH have 1x20m 1x15m 1x10m in stock. So we will need to order all of them. And 1 extra as a spare

2x 20m
3x 25m

Jclark-ctr mentioned this in Unknown Object (Task).Sep 30 2025, 12:49 PM
cmooney added a subtask: Unknown Object (Task).Oct 2 2025, 8:28 AM
VRiley-WMF closed subtask Unknown Object (Task) as Resolved.Oct 9 2025, 9:39 PM

Mentioned in SAL (#wikimedia-operations) [2026-03-19T18:49:08Z] <topranks> add vlan sub-interface for analytics1-d-eqiad vlan to leaf switches in eqiad row d T405562

Change #1255835 had a related patch set uploaded (by Cathal Mooney; author: Cathal Mooney):

[operations/homer/public@master] analytics1-d-eqiad vlan: cease sending RAs on CRs and DHCP relay

https://gerrit.wikimedia.org/r/1255835

Change #1255835 merged by jenkins-bot:

[operations/homer/public@master] analytics1-d-eqiad vlan: cease sending RAs on CRs and DHCP relay

https://gerrit.wikimedia.org/r/1255835

Mentioned in SAL (#wikimedia-operations) [2026-03-19T19:44:48Z] <topranks> disable IPv6 VRRP for et-1/0/5.1023 sub-interfaces on eqiad core routers T405562