Problem with Multilink

[xenolith]

I am having a problem with high latency on a 4 t1 multilink group between a 7206 and 3662.

7206 router
interface Multilink1
ip address 192.168.254.1 255.255.255.252
no cdp enable
ppp multilink
ppp multilink fragment disable
ppp multilink group 1
interface Serial2/0/1:0
no ip address
encapsulation ppp
no cdp enable
ppp multilink
ppp multilink group 1
interface Serial2/0/2:0
no ip address
encapsulation ppp
no cdp enable
ppp multilink
ppp multilink group 1
interface Serial4/0/1:0
no ip address
encapsulation ppp
no cdp enable
ppp multilink
ppp multilink group 1
interface Serial4/0/2:0
no ip address
encapsulation ppp
no cdp enable
ppp multilink
ppp multilink group 1


3662 router
interface Multilink1
ip address 192.168.254.2 255.255.255.252
no cdp enable
ppp multilink
ppp multilink fragment disable
ppp multilink group 1
interface Serial1/0
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 1
interface Serial1/1
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 1
interface Serial1/2
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 1
interface Serial1/3
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 1

The 7206 slot 2 and 4 and MC-T3 cards coming out to M13 muxs to work at the T1 level. All 4 circuits are clean without errors. The multilink group has 1.5meg worth of traffic on it. From the 7206, pinging the 3662 at 192.168.254.2, I have a ping response of 1/23/192ms for min/average/max. Sometimes I have seen this as high as 500ms. Would enabling fragmentation help this problem? Do you have any other recommendations?

 

[JOAMON]

Hello....

These are some additional commands our service provider had us put on our multilink serial interfaces. Not sure if they will help you but we have almost the same setup and is working great.

tx-ring-limit 26
tx-queue-limit 26
no keepalive
no fair-queue

Are you using IP CEF?