Agreed this is a good idea. I can see why it may have been "left alone" previously but given we'd had issues best to bite the bullet and do it.

The 40G uplinks will likely improve things also. +1

I see that the subtask got resolved, nice!

Please run the new/additional cables without connecting them.
Once done we will schedule a window to connect them (and remove the ones not needed anymore).

@Jclark-ctr @wiki_willy do you have any update about this task? This is set to high priority as it is to prevent an outage from re-happening.

cableid 2207506656 fpc7 - fpc5
cableid 2207506655 fpc2 - fpc6
cableid 2207506658 fpc7 - fpc3

Ayounsi did you have ports these need to be plugged into yet?

@Jclark-ctr Awesome thanks! We need to schedule a window to do the plugging/unplugging/reconfiguring. Would next Tuesday, Wednesday or Thursday in your morning works? (thinking of a 2h window, but 1h would be enough). Let me know what works best for you and I'll take care of the announcement.

@ayounsi is there a time window you prefer? I can be available 1pm UTC time I am available any day.

Synced on IRC, we're aiming at Thursday 1pm UTC.

Plan of action:
General overview before/after. Red: deactivated/removed. Green: activated/added.

We're going to work sequentially leaf after leaf, first removing the invalid interfaces, links then adding the correct ones. This means the leaves will temporarily be one legged, but it's better as the other way around as by experience adding too many links causes instabilities.

1/ [dcops] Add 40G optics to ports 0/51 and 0/52 on FPC2 and FPC7
2/ [dcops] Connect the new cables on the FPC2/FPC7 sides only
3/ [netops] Enable the future VC ports on the spines

request virtual-chassis vc-port set pic-slot 0 port 51 member 2
request virtual-chassis vc-port set pic-slot 0 port 52 member 2
request virtual-chassis vc-port set pic-slot 0 port 51 member 7
request virtual-chassis vc-port set pic-slot 0 port 52 member 7

4/ [dcops] disconnect cable on fpc3:1/1
5/ [dcops] connect cable between fpc3:1/1 and fpc7:0/51
6/ [netops] verify fpc3 have fpc2 and fpc7 as peers show virtual-chassis vc-port member 3
7/ [netops] disable old fpc5 vc-ports

request virtual-chassis vc-port delete pic-slot 1 port 1 member 5
request virtual-chassis vc-port delete pic-slot 1 port 2 member 5

8/ [dcops] disconnect cables on fpc5:1/0, fpc5:1/1, fpc5:1/2
9/ [dcops] connect cable between fpc5:1/0 and fpc7:0/52
10/ [netops] verify fpc5 have fpc2 and fpc7 as peers show virtual-chassis vc-port member 5
11/ [netops] disable old fpc6 vc-ports

request virtual-chassis vc-port delete pic-slot 1 port 1 member 6
request virtual-chassis vc-port delete pic-slot 1 port 3 member 6

12/ [dcops] disconnect cables on fpc6:1/0, fpc6:1/1, fpc6:1/3
13/ [dcops] connect cable between fpc6:1/0 and fpc2:0/51
14/ [netops] verify fpc6 have fpc2 and fpc7 as peers show virtual-chassis vc-port member 6
15/ [dcops] disconnect cables on fpc8:1/0
16/ [dcops] connect cable between fpc8:1/0 and fpc2:0/52
17/ [netops] verify fpc8 have fpc2 and fpc7 as peers show virtual-chassis vc-port member 8

cableid c220756659 fpc2 - fpc8.

This has been completed smoothly!

I deleted the following VC cables from Netbox:
0315
0316
0317
0318
0320

Please make sure the cables and optics are removed.

And created:
https://netbox.wikimedia.org/dcim/cables/5707/
https://netbox.wikimedia.org/dcim/cables/5708/
https://netbox.wikimedia.org/dcim/cables/5709/
https://netbox.wikimedia.org/dcim/cables/5710/
@Jclark-ctr could you double check all of the above?

If all good you can close the task!

Mentioned in SAL (#wikimedia-operations) [2022-10-11T06:35:58Z] <XioNoX> delete now unused VC ports on asw2-c4-eqiad - T313384

Verified Netbox Thanks