03-09-2006 02:59 PM - edited 03-03-2019 02:12 AM
Hello everyone.
I'm having problems transfering big packets on some devices.
It seems that when I try to use packets bigger than 5128 some are not reassembled.
I'm getting these errors:
IP: s=10.222.176.1 (GigabitEthernet0/3), d=10.10.31.17, len 752, input feature, Access List(8), rtype 0, forus FALSE, sendself FALSE, mtu 0
ICMP: time exceeded (reassembly) sent to 10.222.176.1 (dest was 10.10.31.17)
show ip traffic didnt show any issues on the 3 catalyst in the path:
IP statistics:
Rcvd: 78928204 total, 3464197 local destination
0 format errors, 0 checksum errors, 1043585 bad hop count
0 unknown protocol, 0 not a gateway
0 security failures, 60 bad options, 9794 with options
Opts: 68 end, 32 nop, 0 basic security, 60 loose source route
9694 timestamp, 0 extended security, 40 record route
0 stream ID, 0 strict source route, 0 alert, 0 cipso, 0 ump
0 other
Frags: 40274 reassembled, 1752 timeouts, 0 couldn't reassemble
168815 fragmented, 14 couldn't fragment
Any clues? what is this ACL 8 that is not configured on the device where I set the debug ip packet?
Vlad
03-09-2006 03:10 PM
Hi Vlad,
According to RFC792:
If a host reassembling a fragmented datagram cannot complete the reassembly due to missing fragments within its time limit it discards the datagram, and it may send a time exceeded message.
I would say that you are losing some packets (fragments) along the way...
Paresh
03-09-2006 05:02 PM
I think you are right, we thought this would be the case, the problem is locating who (or which device ) is causing this fragmentated packet loss.
Any suggestion how to proceed?
Vlad
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