Routing between VLAN on different switches

[s-santhosh]

Please refer to below network diagram for my present situation

Problem: Tracing to VLAN 100/200 - IP Address from VLAN 400/500 is routed via MPLS cloud, running around 3 countries and reaching to VLAN 100/200. This is resulting in bad network performance. Also this is due to default route on Network B cores 0.0.0.0 0.0.0.0 <gateway_ip>

Between Network A & B core switches connected interfaces are trunk port with VLAN 100, 200, 400, 500 are allowed.

Question: How can I influance the traffic to VLAN 100/200 from VLAN 400/500 via connected trunk ports instead of across the MPLS cloud.

All cores are layer 3 devices

[rais]

You can create a L3 link between two top switches with a common ip subnet and run some routing protocol or static routes. The same can be done to the other trunk.

HTH.

[s-santhosh]

Thanks Rais,

You mean configuring VLAN 400 as layer 3 interface in Network A - Core 1 and create route statement in Network B core 1 to point this gateway for VLAN 100 and 200.

[rais · Accepted solution]

You can do a 'no switchport' on an interface that's marked trunk in your diagram. Then configure an IP address - a /30 e.g on this interface and enable routing protocols such as OSPF.

Thanks.

[s-santhosh]

Thanks Rais,

It worked.....