Switchng Frame Relay Providers

[bubarooni]

I am in the process of changing to a different Frame Relay provider. My WAN consists of three locations, each with a 1750 router. The Head End also has a PIX 506 firewall.

Existing DLCI's are:
Head End: 17, 18
Site2: 16
Site3: 16

This DLCI numbering scheme is incompatible with my new service provider. The new DLCI's will be:
Head End: 17, 18
Site2: 17
Site3: 18

The new DLCI scheme actually makes sense to me but the existing seems kind of odd with the two remote sites sharing the same DLCI. Any idea why the existing DLCI's were setup like they were? Is there some advantage? I have noticed that the Gateway of last resort for the headend router is the PIX firewall while the gateway of last resort for the other two locations routers is the router at the headend. I don't know if this has anything to do with the DLCI numbering or not though.

Anyway, I was reading some CISCO docs on Configuring Frame Relay and it states that you should enter the configuration commands in the order specified in the document. I was kinda hoping I would be able to enter a simple "no frame relay interface-dlci 16" on each remote router and then the appropriate "frame relay interface-dlci 17" (and 18 on the the other router) on the appropriate router to effect the change. Tell me it is that easy, please!!!

My LMI interface is CISCO and I have been told by my provider that will not need to change. I am also under the impression that I don't have to worry about the circuit numbers.

Hopefully, all will tell me it is indeed as simple as I dream. If not, please disabuse of that notion now. Any pointers on the subject would also be greatly appreciated.

Thanks in advance for any help.

 

[jeter]

as far as the two remotes having DLCI 16 that does not matter. The dlci's are mapped through 2 different frame relay switch. no advantage really.

As far as the new DLCI's all you need to do is what you mention.

site 1
no frame-relay interface dlci 16 ietf
frame-relay interface dlci 17 IETF

site 2
no frame-relay interface dlci 16 ietf
frame-relay interface dlci 18 IETF

host
Remove the existing DLCI's and add the new ones in the same manner. Given your lmi type and you speed do not change
all should be ok.






Jeter@LasVegas.com
J.Fisher CCNA

 

[bubarooni]

The speed does change, at least somewhat. The CIR's stay the same at 16 and the Head End is staying at 128. However, each remote location is going from a 64 to a 56 kbps connection. I don't know if this is just a difference in the way the carrier are counting the bandwidth (not counting a CRC perhaps?) or what.
Also, when you refer to the host, is that the router at the head end?

Thanks in Advance

 

[bubarooni]

Why do I remove the DLCI's at the head end? They will remain the same (17 & 18).

 

[jeter]

your ok on the host ( head end ) as far as your dlci's 17,18. Now lets talk about your remote sites. You say that your going from a 64 to a 56. What type of wic cards do you have in the routers. hopefully you have the 56/64k wic card installed if so your ok. Jeter@LasVegas.com
J.Fisher CCNA

 

[bubarooni]

In Slot0 of each router I have a card marked WIC 1DSU T1. I'm in trouble aren't I? If I get the proper card can I just toss it into Slot1, make the necessary router config changes, plug my network cable in there and leave the existing card in Slot0 with no ill effects?

 

[jeter]

yes, if this is infact a 56k circuit you will need to purchase the 56k wic card. As far as the interface it should be simple for you to setup. if you have questions come back here! Jeter@LasVegas.com
J.Fisher CCNA