[j-nsp] MTU issues.

[Per Carlson]

On Tue, Mar 17, 2009 at 13:51, Servet Erkün <servet at doruk.net.tr> wrote:
> Nilesh is right  I think , in juniper you specify only payload size ,
> in cisco you specify full frame size (ip header+icmp header+Payload)

On a Cisco-router:

router#ping 10.60.200.1 size 100 repeat 1

Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 10.60.200.1, timeout is 2 seconds:
!
Success rate is 100 percent (1/1), round-trip min/avg/max = 16/16/16 ms


On the wire:

09:36:11.497266 vlan 160, p 0, IP (tos 0x0, ttl 255, id 34, offset 0,
flags [none], proto ICMP (1), length 100) 10.60.200.236 > 10.60.200.1:
ICMP echo request, id 10, seq 0, length 80


The 100 Byte packet length in the ping command results in a 100 Byte
IP-packet, so clearly it *includes* IP and ICMP headers.

-- 
Per Carlson