This task will track the replacement of the existing CM4148 scs-c1-codfw (single PSU) with a newly ordered CM7148 (dual PSU).

Please note there is an identical task for the replacement of scs-c1-codfw via T231686.

This is a non-urgent task, but we do want to have it in place and in use quickly enough that if there is an issue, we can return it for a replacement.

The new CM7148 differs from the CM4148 in the following ways:

• It has redundant power supplies.
• It no longer uses a special pin-out cable, an instead uses standard cat5 patch cables. This means @Papaul has to do one of the two following options for the new console to work:
  • Replace every orange patch cable with a new standard 568B orange patch cable.
  • Redo the open gear side (not the device side) crimping to remove the odd pin out of the old CM4100 serial console required, and re-crimp it with the standard 568B pin out

However, the CM7148 can accept the direct configuration backup of the CM4148, making restoration of the configuraiton the fastest way to make these work. @RobH did a replacement of the scs-ulsfo via T230077, and the checklist for this swap is based off that experience.

scs-a8-codfw replacement checklist:

• - receive in new scs via T228203, add to netbox as 'future-scs-c1-codfw' (ordered via T228203 on 2019-08-30)
• - detail out every connection/port/cable# for the existing scs-c1-codfw (in case the configuration backup/restore fails.)
• - detail out the ip configuraiton, snmp, syslog, and sntp settings (in case the configuration backup/restore fails.)
• - replace all existing orange patch cables in place, leaving them for the physical console swap OR ensure every cable that will be re-crimped will have enough slack to do so.
• - update the existing CM4148 scs-c1-codfw to the newest firmware, this ensures the best compatibility of the configuration backup.
• - create a backup of the CM4148 scs-c1-codfw configuration via the mgmt web interface https://scs-c1-codfw.mgmt.codfw.wmnet
• - erase the configuration of the existing CM4148 before unracking via https://scs-c1-codfw.mgmt.codfw.wmnet and then remove from the rack
• - update the netbox entry for the CM4148 scs-c1-codfw to set the hostname as the asset tag, and set the status to offline.
• - rack the new CM7148 as scs-c1-codfw, update its netbox entry (active state, remove future- from hostname)
• - connect all new serial connections, update netbox to note every single connection. (See the netbox entry for scs-ulsfo as an example.)
• - test ALL serial connections post migration and ensure all items are online. Any not online will require further testing.