L3 Redundancy

[TroyBolton]

Hi, I’ve been tasked with setting up a L3 link between 2 switches and I need some help with my run book to see where I am and what’s missing.

[MHM Cisco World]

Can you elaborate more 

MHM

[TroyBolton]

Hi, sorry i forgot to say that the L3 link i'm setting up is between SW2 and SPN2, and what i need to configure on each of the switches are in the boxes to the right, is there anything specific you'd like to know?

[MHM Cisco World]

Sorry maybe other help you 

I dont get your request correctly.

Sorry again 

MHM

[balaji.bandi · Accepted solution]

As per the diagram you need to have trunk configuration between SW1 to SPN1  and allow the VLAN required to streched between them

same canse SW2 and SPN2.

I do not see any connectivity between B1 and B2, you need to have same trunk configuraiton between B1 and B2 and extended the VLAN.

you can create a Layer3 SVI on those switches to enable Layer 3 connectivity - this is just for connection.

you need to sort the routing what you looking to do. (the diagram does not show the goal and routing part)

[M02@rt37 · Accepted solution]

Hello @TroyBolton 

On your SPn2, you need to create 2 sub interfaces on eth0/0 (one for VLAN 288 and one for VLAN 289), bind each to its respective VRF (office1vrf and office2vrf), and assign the correct IP addresses from the /28 and /29 subnets, while keeping the main interface eth0/0 without an IP and in trunk mode !

Then either configure static routes (per VRF) pointing back to the B1 SVIs or enable a routing protocol within each VRF for reachability... this way SW2 simply carries VLAN 288/289 up to SPN2, where routing and vrf separation takes place !

Hope that clear enough.

[TroyBolton]

Hi thanks for this can you type this out in a config format me as what you have said is a lot!

[MHM Cisco World]

If you can simplify your network I can help you 

You use BLOCK I dont know what is it' is it SW or host ??

MHM