What code you all running on your 6500's ?
12.2 or 15.1?
demise of 12.2 is currently upon us and Cisco to telling us we need to go to 15.1
safe harbor and all that, ya know.
run into any issue in the upgrade process? features comparablebetween 12.2SX and 15.1SY? issues with non-supported line cards. etc.etc.etc....
I think most of our stuff is on 12. 15 introduced some flaky issues for us, but that was 15.0... yet to see what 15.1 does.
Been a year or two since I touched one. We had 7600's, but the move from 12 to 15 went smooth. Actually fixed some of the route-map bugs we had encountered in 12.2.
Ha, I just upgraded a customer VSS to the last 12.2SXJ only 6 months ago.
They made the call not to go 15 due to risk / no new features required on their arch roadmap + the logic that the chassis / SUPs are going EOL in a year or two anyway.
Its also worth noting that (depending on the exact stream) although Cisco has deemed end of maintenance releases and vulnerability support, last date of support is still some time away (2019 for the 12.2SXJ train for example). So if your devices are not internet exposed, have no known bugs affecting you and you have no plans to change your topology or introduce new features in the short term, you're probably golden if you plan on ripping them out in the next 12 months or so. That was my customer's logic anyway.
We are 12.2(18)SXF7 across the board with all of our 6500's with SUP720's. We have had no issues running this code but we are in the process of migrating the connections from our Data Center CORE/DIST over to Cisco Nexus 7009's. The Cisco Nexus 7009's seem to bite us with a bug almost every code upgrade we do. Knock on wood, but I have been here since 2008 and have only replaced a single power supply on the 6500's. The Cisco Nexus 7K hardware, that is another story entirely.