C9500 stackwise virtual link

[osw200051]

Dear Expert,

I want to know if the Stackwise virtual link / or dual active link could be virtual link? such as on interface tunnel port or loopback interface?

Thanks

[Francesco Molino]

Hi

The stackwise virtual link can't be bridged or routed over a L2 or L3 link.

[osw200051]

Dear Francesco,

How about the Dual active links (heartbeat)? Could this heartbeat could be transferred through layer 2 environment rather than point to point connection?

Thanks

[osw200051]

Dear Francesco,

How about the Dual active links (heartbeat)? Could this heartbeat could be transferred through layer 2 environment rather than point to point connection?

Thanks

[balaji.bandi]

Q How does the dual active detection and recovery
mechanism work?
A The dual active fast hello is a lightweight protocol that operates
on a dedicated interface between two stack member switches
of a StackWise Virtual domain. If the SSO active switch receives
a fast hello message after losing all SVL connections, it detects
dual active failure and enters recovery-mode by disabling all
network connection ports to minimize disruption.

[Francesco Molino]

On the doc shared you should have the information. Anyways it can be a dedicated link connecting the devices or going through a 3rd switch using PagP+ but can't be spanned across multiple switches.
Reference doc: 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#concept_sjb_byx_31b