From: ccietester55 ccietester55 (ccietester55@gmail.com)
Date: Tue Mar 25 2008 - 00:25:33 ART
I've been having a lot of trouble getting multilink frame relay to
work. I've set my test lab up as follows
R2 ---DLCI 205--- Frame Switch ---DLCI 502--- R5
In order to make sure I have the frame switch and DLCIs configured
correctly I first configure simple frame relay as follows:
R2:
interface Serial0/1
ip address 10.1.1.2 255.255.255.0
encapsulation frame-relay
frame-relay interface-dlci 205
R5:
interface Serial0/1
ip address 10.1.1.5 255.255.255.0
encapsulation frame-relay
frame-relay interface-dlci 502
This works fine. R2 can ping R5 and vice versa. So now I convert the
configuration to use multilink frame relay:
R2:
interface MFR1
ip address 10.1.1.2 255.255.255.0
frame-relay interface-dlci 205
!
interface Serial0/1
no ip address
encapsulation frame-relay MFR1
R5:
interface MFR1
ip address 10.1.1.5 255.255.255.0
frame-relay interface-dlci 502
!
interface Serial0/1
no ip address
encapsulation frame-relay MFR1
As soon as I type in "encapsulation frame-relay MFR1" on the physical
interface on each router the interface goes down and does not come
back up:
R2#sh int se0/1
Serial0/1 is up, line protocol is down
Just as an extra test I removed the frame relay switch from the middle
and connected the two routers via dual back-to-back serial cables. I
can get frame relay multilink working without a problem over the
back-to-back cables.
Has anybody been able to get multilink frame relay working over a frame switch?
TIA,
Ash.
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