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MLPPP Lost fragments and links out of sequence (no FR or ATM)

I'm trying to diagnose a problem between an IAD 2431 (12.4(24)T6) and a 7206VXR (12.2(33)SRD4) where I see this in my logs on the IAD, repeating over and over...

Feb 13 15:42:13.573 EST: Mu101 MLP: Lost fragment 397A (all links out of sequence)

Feb 13 15:42:13.729 EST: Mu101 MLP: Lost fragment 3982 (all links out of sequence)

Feb 13 15:42:15.766 EST: Mu101 MLP: Lost fragment 3988 (all links out of sequence)

Feb 13 15:42:15.922 EST: Mu101 MLP: Lost fragment 3990 (all links out of sequence)

Feb 13 15:42:17.774 EST: Mu101 MLP: Lost fragment 3996 (all links out of sequence)

Feb 13 15:42:20.474 EST: Mu101 MLP: Lost fragment timeout, seq 399C

Feb 13 15:42:21.498 EST: Mu101 MLP: Lost fragment timeout, seq 399E

Feb 13 15:42:22.030 EST: Mu101 MLP: Lost fragment 39A0 (all links out of sequence)

Feb 13 15:42:22.394 EST: Mu101 MLP: Lost fragment 39A6 (all links out of sequence)

Feb 13 15:42:25.182 EST: Mu101 MLP: Lost fragment 39B6 (all links out of sequence)

Feb 13 15:42:26.766 EST: Mu101 MLP: Lost fragment 39BE (all links out of sequence)

Feb 13 15:42:28.682 EST: Mu101 MLP: Lost fragment 39C4 (all links out of sequence)

Feb 13 15:42:30.770 EST: Mu101 MLP: Lost fragment 39CA (all links out of sequence)

Feb 13 15:42:33.022 EST: Mu101 MLP: Lost fragment 39D0 (all links out of sequence)

Feb 13 15:42:35.018 EST: Mu101 MLP: Lost fragment 39D4 (all links out of sequence)

Feb 13 15:42:37.066 EST: Mu101 MLP: Lost fragment 39DA (all links out of sequence)

Feb 13 15:42:39.102 EST: Mu101 MLP: Lost fragment 39E0 (all links out of sequence)

Feb 13 15:42:41.978 EST: Mu101 MLP: Lost fragment timeout, seq 39EC

Feb 13 15:42:42.958 EST: Mu101 MLP: Lost fragment 39EE (all links out of sequence)

Feb 13 15:42:43.982 EST: Mu101 MLP: Lost fragment 39F6 (all links out of sequence)

Feb 13 15:42:45.082 EST: Mu101 MLP: Lost fragment timeout, seq 39FE

Feb 13 15:42:45.466 EST: Mu101 MLP: Lost fragment 3A00 (all links out of sequence)

Feb 13 15:42:46.470 EST: Mu101 MLP: Lost fragment 3A04 (all links out of sequence)

Feb 13 15:42:49.210 EST: Mu101 MLP: Lost fragment timeout, seq 3A0E

Feb 13 15:42:50.234 EST: Mu101 MLP: Lost fragment timeout, seq 3A10

Feb 13 15:42:50.450 EST: Mu101 MLP: Lost fragment 3A12 (all links out of sequence)

Feb 13 15:42:51.474 EST: Mu101 MLP: Lost fragment 3A1A (all links out of sequence)

Feb 13 15:42:53.482 EST: Mu101 MLP: Lost fragment 3A26 (all links out of sequence)

Feb 13 15:42:53.942 EST: Mu101 MLP: Lost fragment 3A30 (all links out of sequence)

Feb 13 15:42:56.150 EST: Mu101 MLP: Lost fragment 3A3E (all links out of sequence)

Feb 13 15:42:58.874 EST: Mu101 MLP: Lost fragment timeout, seq 3A44

Everything I can find with my google-foo references MLPPPoFR or MLPPPoA, but I'm doing neither... just straight MLPPP. VWIC-2MFT-T1 on the IAD,

PA-2CT3 on the 7206.

IAD Config:

----------------

interface Multilink101

ip address <removed>

no ip redirects

no cdp enable

ppp multilink

ppp multilink group 101

ppp multilink fragment disable

max-reserved-bandwidth 99

!

interface Serial1/0:1

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 101

max-reserved-bandwidth 99

!

interface Serial1/1:1

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 101

max-reserved-bandwidth 99

7206 Config:

------------------

interface Multilink14

ip address <removed>

no ip redirects

ppp multilink

ppp multilink group 14

ppp multilink fragment disable

no clns route-cache

!

interface Serial2/1/9:0

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 14

no clns route-cache

!

interface Serial2/1/10:0

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 14

no clns route-cache

end

1 REPLY
Bronze

MLPPP Lost fragments and links out of sequence (no FR or ATM)

Try to lower the max-reserved-bandwith value, or have a look on this paper it explain how to configure on T1 link.

http://www.cisco.com/en/US/tech/tk39/tk48/technologies_tech_note09186a00800fe2c1.shtml

Hope it helps

Eugen

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