I have configured VSS with cat 6509 switches and is working fine.The VSL link is configured with 10G ports on Sup 720-10g card (5/4 & 5/5).when i was doing the testing for the dual active detection by removing both vsl links,the current active switch was becoming inactive with all interafces shutdown and old standby switch was becoming active and carrying the traffic without any drop.when i was reconnecting teh VSL link, ideally the old active switch should aitomatically reboot and join the clutser as standby but same was not happening.the message i was getting was dirty configuration exists to manually save the configuration and reload the switch.Actulally no configuration wa schanged during dual active condition.Same was checked with how switch virtual redundancy config-mismatch and the output was no config mismacth.Same thing we tried multiple time but same was the result.
finally we shifted the one of the vsl link port from Sup720 to line card in the chassis with 10G port so now the vsl link was comparised of 1 port from sup720-10G and another port from 10G port from line card.post this configuration teh VSS cluster came up and when we tested the dual active scenario again it was working fine.when we reconnected the both the VSL links,old active switch whose intefaces were shutdown due to dual active condition,rebotted and came up in vss cluster as standby.
can anyone please confirm what was the exact problem here.
s72033-advipservicesk9_wan-vz.122-33.SXH5.bin is the software.
VS-S720-10G is the Sup engine
WS-X6708-10GE is teh line card.