02-14-2008 04:48 PM - edited 03-03-2019 08:43 PM
I have a cisco 1751 router with interfaces Ethernet0/0 and FastEthernet0/0.
My ISP is asking me to configure the router with DLCI 16 with IP X.X.X.Xa -Gateway X.X.X.Xb and DLCI 17 with IP Y.Y.Y.Yc - Gateway Y.Y.Y.Yd
How do I configure this?
02-14-2008 04:52 PM
Hi,
its very simple,
You cant do that without Serial interface..
HTH
Mohamed
02-14-2008 06:20 PM
Could you pls list the commands, do I need to define encapsulation as frame-relay on subinterfaces?
02-14-2008 08:54 PM
As pointed out by Mohamed, you would need a serial interface/module for frame relay. Here's how you can configure it:
!
interface Serial1/1
no ip address
encapsulation frame-relay
no shutdown
!
interface Serial1/1.16 multipoint << If using multipoint sub-if
ip add X.X.X.Xa
frame-relay map ip X.X.X.Xb 16 broadcast << If using multipoint sub-if
no shutdown
!
OR
interface Serial1/1.16 point-to-point << If using point-to-point sub-if
ip add X.X.X.Xa
frame-relay interface-dlci 16 << If using pont-to-point sub-if (No need to specify the gateway)
no shutdown
!
Same way create an additional sub-interface (Serial1/1.17) for Y.Y.Y.Yc (DLCI 17).
-Vaibhav
02-14-2008 09:49 PM
Thank You Vaibhav.
Is it not possible to define the DLCI on ethernet interface by creating suninterfaces or by something else.
My ISP has given me some details and from their side its a LAN cable which has to be connected to our router (no serail cable). All they have given is WAN IP's and DLCI id. I couldnot find the option to enable DLCI on Ehternet interface even by defining subinterfaces.
02-14-2008 11:01 PM
Sorry, It has to be terminated on BRI interface. I have BRI0 interface. How do I define subinterfaces on BRI0. I need 2 subinterfaces. I am getting the below error.
TEST(config)#interface BRI0
TEST(config-if)#no ip address
TEST(config-if)#encapsulation frame-relay ietf
TEST(config-if)#frame-relay lmi-type q933a
TEST(config)#interface BRI0:1
% Cannot access B-channel interfaces
02-15-2008 01:45 AM
BRI is normally used as a backup for the frame-relay link. You'll have to have a serial interface for frame-relay to be able to configure IP to DLCI mappings.
-Vaibhav
02-15-2008 05:52 PM
It wont work on the router you have.
Frame-relay connections terminate on serial interfaces. If you have a spare slot get a WIC-1T.
02-16-2008 02:02 AM
I am able to configure as below. Is it going to work? I cannpt have serial interface as the ISP side has given me LAN (RJ45) type connection
---------------------------------------------
interface BRI0
no ip address
encapsulation frame-relay IETF
frame-relay lmi-type q933a
!
interface BRI0.16 point-to-point
ip address x.x.x.x 255.255.255.0
no arp frame-relay
frame-relay interface-dlci 16
02-16-2008 08:18 AM
avil
I do not believe that this will work. The BRI interface expects to talk to an ISDN switch but there is no ISDN switch configuration in what you have posted.
I would like to know more about this ISP connection. You tell us that it is an LAN(RJ45) type connection. What kind of device is it that is giving the connection?
There are quite a number of serial cards with built in CSU/DSU which have connection via RJ45 cable. I suspect that this is what the ISP wants you to use. Especially when a DLCI is part of what they specify it means Frame Relay. And Frame Relay needs a serial connection.
HTH
Rick
02-16-2008 09:02 AM
Hi,
As strange it may seem, frame-realy can be used on ISDN BRI.
However, i think the rj45 that avil has been given, is either a t1 or e1 connector. Avil, can you clarify with you service provider, which service have your purchased ?
02-16-2008 09:19 AM
Paolo
To run Frame Relay over BRI do you not still need the isdn switch-type and other ISDN configuration?
HTH
Rick
02-16-2008 09:27 AM
Yes you do. It was something used in the past to provide back-up with frame-relay services, terminating into devices incapable of routing. I haven't heard on anyone using it for real, but the feature is there.
Also, in Germany, they used isdn bri as replacement for low speed leased lines, that's called nailed bri.
02-21-2008 10:58 PM
My ISDN leased line is up with the below config.
isdn switch-type ABC
isdn leased-line BRI1/0
interface BRI1/0:1
no ip address
encapsulation frame-relay IETF
frame-relay lmi-type q933a
interface BRI1/0:1.16 point-to-point
ip address x.x.x.y 255.255.255.0
ip ospf network non-broadcast
ip ospf cost 10
ip ospf priority 0
no arp frame-relay
no cdp enable
frame-relay interface-dlci 16 IETF
!
interface BRI1/0:1.17 point-to-point
ip address y.y.y.z 255.255.255.0
ip ospf network non-broadcast
ip ospf cost 20
ip ospf priority 0
no cdp enable
frame-relay interface-dlci 17 IETF
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide