Monday, 18 April 2011

Removing and resetting a Juniper EX Virtual Chassis node

We’ve broken up the 5 node cluster and re-racked two of the nodes into a new stack. The following screen shot shows the two nodes as ‘Inactive’ and node members FPC 1 and FPC 4. Both are Linecards because the Master and Backup switches were nodes 0 and 3 in the pre-existing cluster. You can also see that only the vcp-0 virtual chassis cable has been connected (the vcp-1 cable is disconnected for no reason other than we didn’t do it).

Screen shot 2011-04-18 at 21.59.44

First things first, lets kill off the VCP ports to disable the VC traffic.

Screen shot 2011-04-18 at 22.04.16

Now go into config mode by typing ‘configure’. and then we’ll load the factory default settings.

Screen shot 2011-04-18 at 22.05.20

Before we can commit the blank configuration we need to set the root password...it won’t save without it...give it a go if you want.

Screen shot 2011-04-18 at 22.06.02

OK so now commit the blank configuration

Screen shot 2011-04-18 at 22.07.01

Back into EXEC mode we’ll take a look at the new cluster status. Note we can’t see the other node because the VCP ports are disabled.

Screen shot 2011-04-18 at 22.06.34

Lets run through the same process on the other node and commit. Now back in EXEC mode we turn the VCP ports back on. By NOT putting the keyword ‘disable’ on the end they are enabled...I know thats a bit poor but there you go.

> request virtual-chassis vc-port set interface vcp-0
> request virtual-chassis vc-port set interface vcp-1

So now we check the status of the node...all good. We have a Master and Backup in a two node cluster with FPC 0 and FPC1. The mastership priorities are both the default of 128.

Screen shot 2011-04-18 at 22.16.25

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