Cisco 3550 vlan routing 2

[chieftan]

Scenario:-

1 x 3550
4 x VLAN's (A,B,C,D)

Proposal: Need routing between VLAN A and B, but C and D need to be kept seperate.

Problem: Switching on IP Routing will allow all VLANs to communicate with each other.

Question: Is there a way to achieve the proposal without resorting to ACL's?

Example: ip route xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx GW (Required VLAN)?

Thanks

 

[UnaBomber]

Why dont you want to use ACL's?

Do you have a different interface per Vlan?

UnaBomber
ccnp mcse2k

 

[chipk]

If vlan c and d need to be kept separate, as in they don't communicate with the other vlans, or the outside world (?), then just don't assign an IP to the vlan interface.

 

[UnaBomber]

I was thinking of some kind of blackhole routing to the loopback interface, but I dont know anyway of increasing the admin distance of a directly connect interface.

But chipk your sounds the most simple

UnaBomber
ccnp mcse2k

 

[vipergg]

I think everyone is missing the easy solution , you just need to create the layer 2 vlan on the 3550 and do not even create a layer 3 SVI if c and d don't need to be routed. Switching on ip routing does not allow all to route unless you create a SVI for each vlan...

 

[chieftan]

Thanks guys

 

[BuckWeet]

or if seperate routing instances are needed, use VRF's