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Cisco 3550 intervlan routing

Posted on 2004-09-26
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Last Modified: 2008-03-04

I have 6 3550 switches, 2 of which will have devices in both Vlan 1 and Vlan 4 that will need to talk. I have configured intervlan routing on 1 3550 and it works fine, I am wondering if I need to turn on Ip routing on the second 3550 to allow the Vlan 4 to talk to Vlan 1 or will the 1 3550 handle routing for all of Vlan 4 no matter how many switches you have in that Vlan.
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Question by:Jffishbones
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PennGwyn earned 1000 total points
ID: 12161422
One can handle it for now.  As your network grows, you may have cases where traffic between VLANs on one switch has to flow across trunks to another, get routed, and then flow back, and this could start to impact either tiyr trunk bandwidth or your CPU utilization on the routing switch.  At taht point, you might consider distributing the routing load across multiple devices.

But to actually use those multiple devices, you'll need your clients to have a mix of gateway addresses.  You may want to make each routing switch also serve a DHCP scope within your address space, offering itself as default gateway, on the reasonable expectation that most clients will pick up DHCP from their nearest server....

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by:Jffishbones
ID: 12161554
Cool, I see it is working. Thanks
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