SVL Configuration

[john_lee]

Hi, recently we had purchase 2 units C9500 series and it will be a core switch. I would like to setup it by using stackwise virtual technology. Below is the SVL design:-

* Two 10G interface for SVL link (it is redundancy supervisor engine, each link connect to each supervisor)

* One 10G interface for dual active detection (will to 10G interface on one 24 ports module)

Can I know below my configuration correct or not ?

Core 1

=====

!

stackwise-virtual
domain 10

!

interface port-channel 1
description *** Stackwise Virtual link ***
stackwise-virtual link 1

!

interface range ten<slot/port number>
description *** SVL link from Core 2 to Core 1
stackwise-virtual link 1
channel-group 1 mode lacp

!

int ten<slot/module/port number>
description *** SVL keepalive link ***
stackwise-virtual dual-active-detection

Core 2

=====

!

stackwise-virtual
domain 10

!

interface port-channel 1
description *** Stackwise Virtual link ***
stackwise-virtual link 1

!

interface range ten<slot/port number>
description *** SVL link from Core 2 to Core 1
stackwise-virtual link 1
channel-group 1 mode lacp

!

int ten<slot/module/port number>
description *** SVL keepalive link ***
stackwise-virtual dual-active-detection

Can I know is it 2 core need to have different port channel number or can used same number? Another is the stackwise virtual link number, is it can have same number?

Thank you.

Regards,

 John

[UtkarshDewangan4753 · Accepted solution]

The Cisco Stackwise-VIrtual cannot be configured on the port-channel Interfaces.

you would need to use physical interfaces  either 10g or 25g or 40 or 10g

en

conf t

stackwise-virtual
domain 10

!

Interface Tengig <Interface>

stackwise-virtual link 1

!

end

reload

repeat the above for the the other switch too

Cat 9500 is a fixed configuration switch and the supervisor engine is inbuilt.

Be aware that till 16.6.5 16.9.3 releases the ports which can be used for stackwise are only inbuilt ports not from the uplink module. do check the limitations and release notes for specific info.

once you have both of them connected in stackwise you can configure the dual active detection

this can come as a good reference

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9500/software/release/16-6/configuration_guide/b_166_ha_9500/b_166_ha_9500_chapter_01.html

[john_lee]

Hi, thanks for your response. If I had 2 SVL link for each core then I only repeat same configuration as below.

core 1 (port number as example)

------

interface Tengi 1/2/7

stackwise-virtual link 1

!

interface Tengi 1/2/8

stackwise-virtual link 1

Repeat the same configuration to core 2. Is it correct?

[UtkarshDewangan4753]

Hi,

Yes you would have to repeat the same in core 2.
the configuration would be same. "stackwise-virtual link 1" would be used on every interface whichever is participating in SVL connection.

[balaji.bandi · Accepted solution]

here is the good reference guide :

https://www.cisco.com/c/dam/en/us/products/collateral/switches/catalyst-9000/nb-06-cat-9k-stack-wp-cte-en.pdf