tests for tcpdump

[shakan <shakan () softhome net>]

Hello all,

How to test tcpdump with the following expressions. Sorry for simple question.

Plz help me with smaple examples.

# tcpdump <expression>

expressions are
1 ether dst ehost -> True if the ethernet destination address is  ehost.  
2 ether src ehost -> True if the ethernet source address is  ehost.
3 ether host ehost ->True if either the ethernet source or destination address is 
ehost.
4 gateway host ->    True if the packet used host as a gateway.
5 dst net net ->     True if the IP destination address of the packet has a network 
number of net. 
6 src net net  -> True if the IP source address of the packet has a network number of 
net.
7  net net  -> True if either the IP source or destination address of the packet has a 
network number of net.
8  net net mask mask   ->True if the IP address matches net with the  specific netmask. 
May be qualified with src or dst.
9  net net/len -> True if the IP address matches net a netmask len bits wide. May be 
qualified with src or dst.

 
I want to test these in hp-ux.

I'm not able to understand "ehost" in 1,2 and 3 options.

Could anybody plz help me to execute these options with sample examples.
Advance thanks,

-shakan


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