I've inherited this network and an task to upgrade and replace a Arista (mlag Domain) vPC
With another pair of Nexus 3.5K's
I tried to do a over night swap without success as a result I'm force to do the granular method.
Not having done much vPC integration I wanted to check I can do this to phase out my Arista's
I've got my new vPC domain 5 setup and running.
To merge it in should it be as simple as dropping in the new vlan with these IP's?
you need to make sure the connection between old arista and nxos is connected at L2 and L3
This way it will allow you to migrate peicemeal the trunk interconnects
Once this is complete you could then begin with the routing - you dont mention if you are running any dynamic routing but if you are you can enable it on the nxos and then again piecemeal relocate the l3svis (including any related static routes)
once that is complete you then relocate firewall connection and disconnect the arista.
So I'm using static routing for next hop.
When you say connect the Nexus to the Arista, you saying just connect it via a port-channel, then trunk a the vlan's I need?
Also is there a way i can keep a scope the same on both VPC domain's?
At the moment everything on VPC domain 1 is a 10.11.10.x
Everything on VPC Domain 5 is a 10.15.10.x
e.g Have 10.20.10.x serve on both VPC Domain 1&5
If you looking to replace Arista, then you need build new nexus 3K vpc in the same way , so you can shutdown the Arista links and bring up nexus links
make sure you use the same IP address space if you looking to Migrate Like a Like setup
if you looking to change the Routing mode, then you need routing in place for the 10.10.10.0/29 network back from FW.
So as per first diagram I'm doing a gradual change over as I had an issue doing and overnight swap out using the Arista's routing IP's.
Currently my routing is working on the new Nexus IP route.
I'm going ot try what Paul suggested and see how i go.
My other question about having the same IP scope on both VPC domain's.
I think I figured is out just need to double check.
basically if i have 10.20.10.x in both VPC Domain i just need to make sure that both have routes to each outher.
i.e. VPC Domain 1 : ip route 10.20.10.0/24 10.30.10.4
VPC Domain 5: ip route 10.20.10.0/24 10.30.10.1
Okay so i tried this bit not getting it right.
I get a ping between everything okay. So the links between the switches are good.
How do I cycle a vlan between them successfully.
ip route 10.20.10.0/24 10.10.10.2
ip route 10.20.10.0/24 10.10.10.1
ip route 10.20.10.0/24 10.50.10.2
ip route 10.20.10.0/24 10.30.10.1
If i try add a ip route to domain 5 for 10.20.10.0/24 from domain 1
Then only that subnet works on Domain 5 and drops it on Domain 2
What am i missing?