Multilink PPP only half of the bandwidth

[horvaia]

Hello,

I have a 10 Mbit line with one of my customers. The problem is that he can only

use the half of the bandwidth. I'm using

Multilink PPP to join the five 2 Mbit (1984) E1s. What can be te problem?

Here is the show commands from my side:

Multilink2, bundle name is Internet

Bundle up for 2w4d

1016 lost fragments, 14458402 reordered, 0 unassigned

583 discarded, 0 lost received, 112/255 load

0x1D8935 received sequence, 0x629CE1 sent sequence

Member links: 5 active, 0 inactive (max not set, min not set)

Se1/1:1, since 2w4d, last rcvd seq 1D8930

Se6/0:1, since 1w6d, last rcvd seq 1D8931

Se5/1:1, since 2w4d, last rcvd seq 1D8932

Se2/1:1, since 2w0d, last rcvd seq 1D8933

Se5/0:1, since 2w0d, last rcvd seq 1D8934

#sh interfaces multilink 2

Multilink2 is up, line protocol is up

Hardware is multilink group interface

Description: Multilink

Internet address is 192.168.4.57/30

MTU 1500 bytes, BW 9920 Kbit, DLY 100000 usec,

reliability 255/255, txload 110/255, rxload 5/255

Encapsulation PPP, loopback not set

Keepalive set (10 sec)

DTR is pulsed for 2 seconds on reset

LCP Open, multilink Open

Open: IPCP, CDPCP

Last input 00:00:03, output never, output hang never

Last clearing of "show interface" counters 5d22h

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 19597

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 226000 bits/sec, 256 packets/sec

5 minute output rate 4307000 bits/sec, 396 packets/sec

30197569 packets input, 3605082885 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

48094316 packets output, 59755166 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

Thanks,

Andras

[horvaia]

Hi,

Forst of all:

Thanks for your hints!

Here are the interface pairs:

customer_side: my_side:

Se0/1, -----------> se1/1:1

Se1/0, -----------> se2/1:1

Se1/1, -----------> se5/0:1

Se1/2, -----------> se5/1:1

Se1/3, -----------> se6/0:1

customer equipment: c3660: IOS Version 12.2(34) is-mz

my equipment: c3725-I-M IOS Version 12.3(13b) i-mz

What do you think how to rearrange to pair

them correctly?

Thanks,

Andras

[jackyoung]

Thanks and will wait for the result. According to the Mike's post and the capture result. It shown there are lots of recordered packet. I believe Mike's proposed link can help. But I am sorry that I can't access the link, so I can comment on it too much.

Please try to check the cable in both sites to ensure it is connected as same order then it may solve the problem.

Hope this helps.

[horvaia]

Hi,

this ordering problem is very strange.

it seems that every time when I issue

the sh ppp multilink int multi 2 command

the interfaces order are different.

[jackyoung]

Can you provide those different order screen captures ? Did you try to reorder the connection physically ? i.e. local first port connects to remote first port,...

[horvaia]

Hi,

I reordered the links but with no success.

Everything is the same. The customer can use

only the half of the bandwidth. I still have

a huge numbers of reordered packages. Any other idea?

We tested that only one link is alive in the

Multilink bundle and we were able to use the

whole 2 Mbit. Very strange.

Thanks,

Andras

[jackyoung]

Can you advise the links which cannot achieve 2Mbps is MLPPP enabled or disabled MLPPP ?

If it is the first case, can you try to disable the MLPPP in each link and test again. I could like to isolate the MLPPP issue first. If the link w/ HDLC or PPP cannot achieve 2Mbps, then it may the problem of the link or the router hardware.

If this the second case, can you advise is there any special combination of the link between two routers that cannot achieve 2Mnps ? e.g the specific module or port at one side cannot made 2Mbps even connect to any port at remote side.

However, please backup the config. and record down the change of the config. during the test. I think it will be a complicated test w/ different ports. It is easily to mix up the connection. Take care.

Could you please also provide the module information of both routers ?

Thanks.