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Can Cat6509 FE port serve as layer-3 gateway to layer-2 net without router?

We'd like to eliminate our (2600) router currently connecting a layer-2 (DEC) network to our Cisco (layer-3) net, by using one of the FastEthernet ports on our Cat6509 6548 cards??

1- Don't want stp between DEC/Cisco nets.

Can we shut off stp on the FE port?

2- I wonder if the vlan tags on the FE port will be a problem for th DEC net?

Is there a way to create a layer-3 route on the FE port without definging a vlan on this port?

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Re: Can Cat6509 FE port serve as layer-3 gateway to layer-2 net

In Catalyst OS (CatOS), a default gateway must be defined on the Supervisor Engine. This default gateway is usually the IP address of an active interface on the router. The router may be internal, such as the MultiLayer Switch Feature Card (MSFC) or Route Switch Module (RSM) on the Catalyst 6500 or 6000 series, and the Route Switch Feature Card (RSFC) or RSM on the Catalyst 5500 and 5000 series, or external. The default gateway allows frames (which then become encapsulated as packets) to be sent to the router for routing between VLANs or to other subnets

Console> (enable) set ip route default 10.1.1.10

Console> (enable) set ip route default 10.1.1.20

Console> (enable) set ip route default 10.1.1.1 primary

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