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New Member

Routing between VLAN on different switches

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

1 ACCEPTED SOLUTION

Accepted Solutions
Silver

Re: Routing between VLAN on different switches

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.

4 REPLIES
Silver

Routing between VLAN on different switches

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.

New Member

Routing between VLAN on different switches

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.

Silver

Re: Routing between VLAN on different switches

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.

New Member

Routing between VLAN on different switches

Thanks Rais,

It worked.....

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