From: Bob Sinclair (bsinclair@netmasterclass.net)
Date: Tue Aug 31 2004 - 13:41:13 GMT-3
Gladston,
I get different results. Here is output with fragmentation at 320 bytes.
These pings are being fragmented. You can also do a "debug frame
fragment..." to see this. Something else going on?
R3#sh frame fragment
interface dlci frag-type frag-size in-frag out-frag
dropped-frag
Serial0/0 301 end-to-end 320 228 30 0
R3#ping ip
Target IP address: 172.16.123.1
Repeat count [5]:
Datagram size [100]: 400
Timeout in seconds [2]:
Extended commands [n]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 5, 400-byte ICMP Echos to 172.16.123.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 176/176/176 ms
R3#sh frame fragment
interface dlci frag-type frag-size in-frag out-frag
dropped-frag
Serial0/0 301 end-to-end 320 240 40 0
Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net
----- Original Message -----
From: <gladston@br.ibm.com>
To: <ccielab@groupstudy.com>
Sent: Tuesday, August 31, 2004 10:51 AM
Subject: Ping and Fragment
> Ping fails if the packet is bigger than the fragment size. Any Thoughts?
>
> r3(config-map-class)#frame-relay fragment 500
> r3(config-map-class)#
> r3#p 172.16.23.2
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 172.16.23.2, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 20/20/24 ms
> r3#p
> Protocol [ip]:
> Target IP address: 172.16.23.2
> Repeat count [5]:
> Datagram size [100]: 600
> Timeout in seconds [2]:
> Extended commands [n]:
> Sweep range of sizes [n]:
> Type escape sequence to abort.
> Sending 5, 600-byte ICMP Echos to 172.16.23.2, timeout is 2 seconds:
> .....
> Success rate is 0 percent (0/5)
> r3#
>
>
> r3#p
> Protocol [ip]:
> Target IP address: 172.16.23.2
> Repeat count [5]:
> Datagram size [100]: 400
> Timeout in seconds [2]:
> Extended commands [n]:
> Sweep range of sizes [n]:
> Type escape sequence to abort.
> Sending 5, 400-byte ICMP Echos to 172.16.23.2, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 56/59/60 ms
> r3#
>
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