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New Member

Bridge over Multilink no passing packets bigger than 1458 bytes

I have configured a IRB bridge over multilink on routers 2801 using a Multilink with two E1 links, I can do ping from each side to the other, but when I try to put traffic over 1458 bytes I get TIME OUT, same problem when I try to pass files usin FTP.

Routers 2801

Cisco IOS Software, 2801 Software (C2801-ADVSECURITYK9-M), Version 12.4(1a), RELEASE SOFTWARE (fc2)

show bridge group

Port 3 (FastEthernet0/0) of bridge group 1 is forwarding
   Port 10 (Multilink1) of bridge group 1 is forwarding
     Packets too large for translational bridging: 0 input, 9635 output

show ppp multilink

Multilink1, bundle name is rt-satplc03
  Endpoint discriminator is rt-satplc03
  Bundle up for 00:03:55, 1/255 load
  Receive buffer limit 24000 bytes, frag timeout 1000 ms
    0/0 fragments/bytes in reassembly list
    0 lost fragments, 1142 reordered
    0/0 discarded fragments/bytes, 0 lost received
    0x35E5 received sequence, 0xAF sent sequence
  Member links: 2 active, 0 inactive (max not set, min not set)
    Se0/3/1:1, since 00:03:55
    Se0/3/0:1, since 00:03:54
No inactive multilink interfaces

See the attach config files for each router.

Let me know if you need any other information,

Hope you can help.


Hall of Fame Super Gold

Re: Bridge over Multilink no passing packets bigger than 1458 by

I do not know if Bridge over multilink was ever offically supported over multilink, even if configurable.

The TAC may have a word on this perhaps.

New Member

Re: Bridge over Multilink no passing packets bigger than 1458 by

Thanks Paolo for the advice,  I have worked the bridge configuration with no luck, when I just live one of the interfaces in the bundle I have no problems, but when I put the two serial interface in the bundle the problem appears, I think you right, but I would like to get an official answer from CISCO.