Cisco 9500 Stackwise woes

[DigiDen]

Hi,

We have a pair of brand new Cisco 9500 24p switches, which we are trying to stack.

They are running Cisco IOS XE Software, Version 17.09.04a

network-advantage (C9500 Network Advantage)

We have been using the following commands to set them up for stacking:-

switch pri 15  (switch1)

Switch 1
conf t
stackwise-virtual
domain 1
end
reload

Switch 2
conf t
stackwise-virtual
domain 1
end
reload

create stacking interfaces on switch 1
conf t
int range twe 1/0/23-24
stackwise-virtual link 1
end
reload

create stacking interfaces on switch 2
conf t
int range twe 2/0/23-24
stackwise-virtual link 1
end
reload

create the DAD link dual action detections on switch 1
conf t
int 1/0/1
stackwise-virtual dual-active-detection

At this point, Switch 2 is automatically renumbered,  but the switches do not speak, SH SW on SW1, shows only itself, even though the Virtual link shows up.

create the DAD link dual action detections on switch 2
conf t
int 2/0/1
stackwise-virtual dual-active-detection

As soon as the DAD link is added, both switches reboot, and the second switch comes up in recovery mode.

*May 22 12:47:59.162: %NIF_MGR-6-DAD: Chassis 1 R0/0: nif_mgr: Dual Active detected: Peer system in recovery mode. Peer system has equal or lower priority.

No other config on the switch just now, just the stack wise setup?

I've tried all variations of reboots, but the second switch always goes into recovery mode.

What am I doing wrong!

thanks very much.

[marce1000]

                                            - You may find this document useful :
                 https://www.cisco.com/c/en/us/support/docs/switches/catalyst-9500-series-switches/216537-troubleshoot-svl-on-catalyst-9000-switch.html

 M.

[Reza Sharifi]

Hi,

What is the output of :

show stackwise-virtual link?

[DigiDen · Accepted solution]

I flattened the config again, and made a few changes to the way you apply the config, rather than a reload after each command, I waited until both DAD, Domain and Virtual link were setup on the 1st switch, then rebooted, repeated the process on the second switch, and it did appear to be much happier.

boot both switches up, connect DAD and SVL Stackwise fibres

Change sw1 to pri 15
switch pri 15

Switch 1
conf t
stackwise-virtual
domain 1
end

create stacking interfaces on switch 1
conf t
int range twe 1/0/23-24
stackwise-virtual link 1
end

create the DAD link dual action detections on switch 1
conf t
int 1/0/1
stackwise-virtual dual-active-detection

copy run start.
reload

then

Switch 2
conf t
stackwise-virtual
domain 1
end

create stacking interfaces on switch 2
conf t
int range twe 1/0/23-24
stackwise-virtual link 1
end

create the DAD link dual action detections on switch 2
conf t
int 1/0/1
stackwise-virtual dual-active-detection
reload

Shut switch stacks down multiple times, and both returned to service, without issues.

thanks

[Reza Sharifi]

Nice work! Thank you for updating us.