Upgrading CRS1 to CRS3

[ctaccori]

Hi guys,

given the following thread and relative official documentation:

https://supportforums.cisco.com/discussion/11298231/ask-expertupgrading-crs1-system-crs3

since the activity would cause several outage hours, I would like to be sure about the correct procedure and confirm the activity plan we are supposed to follow. We will perform the upgrade on 3 nodes which system snapshot is:

- CRS-1 8 slot

- IOS XR 3.9.2

- CRS-8-RP

We purchased the CRS-3-UPGRADE-BUN upgrade hardware and we are going to equip CRS-CGSE-PLUS Service Card and  14X10GBE-WL-XFP.

Our 8 steps draft plan is:

1) upg XR 3.9.2 -> 4.2.3
2) reload
3) upg fabric 40G -> 140G
4) upg RP -> PRP-6G (implicit reload)
5) upg XR 4.2.3 -> 5.2.2 (due to features constraints)
6) reload
7) install 14X10GBE-WL-XFP and/or install CRS-CGSE-PLUS
8) activate Licenses

Any comment or drawback warning?

Thanks in advance

[smilstea]

Hello,

Another method you might want to consider is pre-baking the PRPs with 4.2.3 or 5.2.2

If you chose, especially, 5.2.2, then upgrade ROMMON first on all cards (http://www.cisco.com/c/en/us/support/docs/routers/crs-1-16-slot-line-card-chassis/117700-technote-rommon-00.html).

For either code you can simply power down the router, pull out the fabric cards and RPs, and replace them with the CRS-3 fabric cards and PRP.

If you cannot pre-bake the images then you will need to do the RP -> PRP migration or a turboboot on the PRPs, which really a turboboot to 5.2.2 might be faster then taking the hit of upgrading to 4.2.3 -> PRP migration -> upgrade to 5.2.2 but if you do this then again the manual ROMMON upgrade is recommended.

Thanks,

Sam

[ctaccori]

Thank you Sam. I think we'll prepare the new HW in a stage environment and then upgrade to CRS3 as you suggested.

Regards

Carlo