Multilink Configuration - IP route-cache cef

Unanswered Question
Oct 15th, 2009
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I have two routers each connected to an MPLS network with multiple T1's using multilink. The configuration for the multilink on the two routers is different.

Router A

interface Serial0/0/0:0

description MPLS

no ip address

encapsulation ppp

no ip route-cache cef

ip route-cache flow

load-interval 30

no cdp enable

ppp multilink group 1

hold-queue 256 out

Router B

interface Serial0/1/0

no ip address

encapsulation ppp

load-interval 30

no fair-queue

ppp multilink

ppp multilink group 1

On router a I am wondering if the "no ip route-cache cef" and "hold-queue 256 out" commands should be there and the same things for Router B "no fair-queue".

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Giuseppe Larosa Thu, 10/15/2009 - 10:56
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Hello Martyn,

ip route-cache cef would be good to be placed again.

hold-queue 256 out increases the output queue to 256 packets.

my guess is that someone has tried to find a workaround to some problem like losses on the multilink bundle and so he/she has disabled CEF switching and increased the size of the queue in an hope to overcome this problem.

no fair-queue: again generally speaking having fair-queue enabled is generally better.

Hope to help


bava_ccna Fri, 10/16/2009 - 01:57
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one quick qustion..what fair-queue will do in a multilink..Is it need to be matched at both the end configuration...

Thanx in adv..


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