How can I add a second frame relay to my existing router?

[bayardsales]

I have an IBM 2210 model 24E at my central location. I have a 256k frame relay circuit attached (DLCI 16). 6 other remote locations with 56K and 128K frame relay circuits are connected to the central location (DLCI 17-22). MCI has installed a second frame relay line in each of the remote offices (upgrading from 56K to 128K-DLCI 200-205). I have also installed a second 256K frame relay(DLCI206) at the central location (MCI will give me a lower monthly rate if I change my current 256K to 256K???). Anyway, I want to install the second 256K line(DLCI 206) to my 2210 router (4 WAN capability) while running with the current 256K line(DLCI 16). I want to first change over 1 remote office from their current 56K circuit to the new 128K circuit (disconnecting the 56K circuit) and test it for a week to make sure everything is okay. Then I want to do the next remote office and do the same until I have all remote offices running on the new circuits. Can I do this? MCI does not have an answer for me other than cutting every one over at once which we cannot do due to 24-hour operations and lack of technical personnel to be at each site.
In summary, can I add an additional frame relay to my central location and run our other remote offices on one or the other central frame relay connections while converting over to the new circuits? Am I making myself clear?
Thank you for your help in advance.

 

[svermill]

I don't see any reason why not. Inverse arp and/or map statements will let the router know who is and isn't on the other end of any given circuit. And presumably you have thought your cutover through from a routing protocol (or static route) perspective so that you central site discovers the remote site networks correctly and vice versa.

 

[jeter]

It appears that as long as all the frame-relay circuits new and old map to the correct host circuit you will be find because they are using different DLCI's. You can install the new 128k and leave the 56k looped up so that your provider will not shut it down. Jeter@LasVegas.com
J.Fisher CCNA