Procedure for replacing a ASR9006 chassis in an existing NV edge cluster

[Sebastiaan1978]

Hi,

I have a running cluster with 2 ASR9006 chassis. I want to replace 1 chassis by a new ASR9006 chassis.

The current config (IOS XR 4.3.4) looks like this:

nv
 edge
  control
   serial 123 rack 0
   serial 456 rack 1
  !

The final config without downtime for rack 0 should be :

nv
 edge
  control
   serial 123 rack 0
   serial 789 rack 1
  !

My best guess is:

1) power down chassis in rack 1

2) nv edge control serial 789 rack 1 command on chassis in rack 0

3) connect all control and data links to new chassis in rack 1

4)  power up new chassis in rack 1 (with identical config as rack 0, including the "nv edge control serial 123 rack 0"  "nv edge control serial 789 rack 1" commands )

Can anyone tell me if this is the correct procedure? Is this possible without downtime? Does anybody have experience with this? Does anybody know if there is a Cisco documented procedure? The only document I can find is the single chassis to cluster migration document.

Many thanks in advance!

Sebastiaan

[Aleksandar Vidakovic]

Hi Sebastian,

Presuming you already have the new rack1 running the exact same SW package as rack0, below is the procedure you can follow.

[*] get rack1 chassis serial number
show inventory chassis

[*] reload rack1 into ROMMON mode

[*] clear boot variables
unset CLUSTER_RACK_ID
unset CLUSTER_NO_BOOT
unset BOOT
sync

[*] power down rack1 and connect cluster cables

[*] on rack0 configure cluster to accept new serial number
admin config
nv edge control serial <RACK0CHASSISSERIALNUMBER> rack 1

[*] power on rack1

[*] use "show nv edge control control-link-protocols" on rack0 to watch for cluster join

[*] verify health
show redundancy
show platform

[*] test a failover
redundancy switchover

[*] verify health
show redundancy
show platform

Aleksandar

[Sebastiaan1978]

Thanks a lot Aleksandar,

That was what I was looking for. Do you have any real life experience with this procedure, just to make sure because it is a "live" environment so any downtime of Rack 0 would impact our customers.

Regards,

Sebastiaan

[Aleksandar Vidakovic]

yes, this was performed by multiple customers. Just make sure that both racks have the exact same pies (main package and SMU/SP) installed before you start.

Aleksandar

[Sebastiaan1978]

Great, thanks again!

Sebastiaan