Currently I have 2 6500 running as the Core router/ switch with all HSRP and SVIs confgured working no problem.
But, they are due an upgrade EoL...
I'm looking to replace like for like 6800 and I want to introduce VSS.
What options will I be looking at to minimise downtime?
I have thought of adding the new 6800s as a standby HSRP and slowly migrate all servers to the new Core then re-configure them as VSS and decommission old 6500 but this way is time consuming but less Risky!
i had a similar situation 1 month ago, when i had to replace 2 x 3750x in hsrp config with 2 4500x with vss. I done the same your question but i choose to configure new 4500x in vss using ip address on svi a bit different and i inserted on network. I created all svi on 4500x as i had on 3750x with a little difference of ip and after that i switched one svi at time removing the ip of hsrp on ald 3750x. In my case i couldn't have downtime becouse 1000 users working on that networks.
i was me on the 4500x to change ip on svi and my colleague on 3750x to remove hsrp config simultaneously.
when you remove hsrp on old switches you only can remove standby xx ip 10.11.12.13 . When finish to migrate all you can clean the config not necessary.
with this situation you migrate one svi at time and you can test the signle inter vlan routing at time.
If you want to configure vss later, will beimpossible to don't have downtime. The switch during the reboot to create vss configuration needs about 4 mins and the switches needs to be rebooted both.
The steps 1,2&3 are correct. I removed the primary link, removed the hsrp ip And configured as vss ip. Remenber clear arp to speed up the new arp table. After that the gw will be the vss and move the second link.
You will have a little bit of downtime , 2 or 3 ping loss
I agree the easiest way might be to temporarily trunk the 6500 to the new 6800 . HSRP goes away with vss so I assume your svi on the new box will be the vip address under the new svi on the 6800 . As previous poster said then just migrate them 1 at a time
unless you are adventuresome and want to hot cut everything at once!!! Carefully look over how everything is tied to gether now and what would have to be moved . You really have to map out every single port if the 6500 is going away and this will be a time consuming process . Actually we have the same thing coming soon where a 3750 stack is going away and 4500 vss is being reccomended, a big job for sure...
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...