Internet Line On Layer 3 Switch 3560

Unanswered Question
Apr 15th, 2008


we have internet line from bharti and we want to terminate on layer 3 switch.what configertation will need to be done.

I have this problem too.
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Jon Marshall Wed, 04/16/2008 - 03:09


Security considerations aside for the moment. I'm assuming the Internet presentation is an rj45 connection ?

On the switchport on the L3 switch

int fa0/1

no switchport

ip address

where the IP address is the IP address/subnet mask supplied to you by your ISP.

There are still a lot of unanswered questions. If you just need a default-route to get to the Internet then you can just do

ip route

The major Caveat to all the above is that unless the L3 switch is a 6500 it will not do NAT so if you are trying to NAT private internal addressing to public addressing to go out onto the Internet you can't do this on a L3 switch.

Obviously there are security concerns as well. Are you putting the switch in front of a firewall. How do you propose to filter the traffic.



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