Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 
Community Member

Extending switch network across T3

I have a requirement to connect two sites with T3 circuit using 3845 with NM-1T3 serial module. The 1st site is primary site and 2nd site is remote site that is an extended switched network of pri site. Due to time constraints (or I would use TSL) I have to use T3.

I am trying to implement the quickest (easiest) T3 solution to connect sites. Each site has 3845 with T3 module and switched network behind. Pri site has DHCP server and rest, remote site will get all network config and dependent on pri site, VLANS need to be trunked from remote to Pri across T3.

Please let me know the solution, example config between sites, or link for config.

Thank you


Re: Extending switch network across T3

why do you need to extend switch network? you can use routing in place of this.

it's better and you can still use your dhcp server in remote site.

but if you really want this you can use bridging (

Community Member

Re: Extending switch network across T3

Two separate sites connected via Cisco 3845 and T3 module. Request assistance in configuration to bridge sites (extend switched network).


CreatePlease to create content