Policy Based Routing in 3750 Switch

The scenario is as follows :

a) A 3750 Switch , which as 2 VLANS , one is DATA VLAN and other VLAN is Voice VLAN

b) In the WS-C3750X-24P-S   Switch, DATA VLAN Gateway is a Router and Voice VLAN is a Voice gagteway has conected

c) In the Same Switch having two Gateways , in turn Gateways are connected to Internet

Querie :

a) How to Configure Routing for DATA and Voice for getting internet.

b) Is PBR helps for Each VLAN traffic sets with the respective gateways

c) Will it WOrks or any suggestions ?

d) Pls send the refference COnfiguration

You can just set up normal default routing for the data vlan, and just set up PBR for the voice traffic.

So you will just create an access-list to match vlan traffic and then create a route map to set the next hop to the voice gateway.

Forget about PBR, you don't need that. The switch has its default gateway in the data VLAN so you can access it and manage it, the default gateway points to the router IP address. All PC have their default gateway pointing to the router IP address, not to any address on the switch.

All phones have their default gateway on th IP address of the voice gateway, not on any IP address of the switch. The switch does not even need an IP address in the voice VLAN. It only transports ethernet frames in the two VLAN. For that matter just have a config with two VLAN, assign the VLAN to the corresponding ports and in case you use phones and PC on the same ports use the voice vlan commands.

I hope I have understood your situation correctly. Otherwise let me know.

I agree. If he is in fact just using the 3750 as a layer 2 switch then he doesn't need PBR. My assumption is that he is (I would hope) using the WS-C3750X-24P-L  as Layer 3 and have SVI for each vlan. Thus, he would need PBR in that case.

I don't know why everybody is so keen about using PBR. I agree it is a nice feature but in my opinion it is designed for situations that you have no other way of bringing them into service.

 IP is still a destination based protocol and so all optimizations in terms of forwarding performance are based on the destination address as criterion. After switching on PBR everyody asks immediately "why is it slower than what I am used to?". I have seen this in many situations.

For normal situations like one voice and one data VLAN a normal network design should be sufficient and therefore no need for PBR.