ping command

Unanswered Question
Aug 29th, 2007

Hi experts,

In my network I am able to ping from my one of the lan pc to external network but I am unable to do the same thing from my router int. any body can give suggestions.



I have this problem too.
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Jon Marshall Wed, 08/29/2007 - 23:06

Hi Naidu

This could well be down to the interface the router uses as it's source IP address when you do the ping.

Could you use the extended ping on the router and when it asks for the source interface use the IP address of the router interface that connects to your LAN.



ilnaiduccna Wed, 08/29/2007 - 23:28

Hi Jon,

Thanks for your early reply,

But I am not aware to use extended ping, can you tell what is the extended ping and how, from where shall we use it.

And what is the difference btw extended ping and normal ping (which from router int.)

many thanks in advance.


Jon Marshall Wed, 08/29/2007 - 23:41


Extended ping on a router just gives you the ability to set more options. To use it just type

router# ping

and then hit return and it asks you questions as to what you want to do with the packet. Here's an example from one of our lab routers



Protocol [ip]:

Target IP address:

Repeat count [5]:

Datagram size [100]:

Timeout in seconds [2]:

Extended commands [n]: y

Source address or interface:

Type of service [0]:

Set DF bit in IP header? [no]:

Validate reply data? [no]:

Data pattern [0xABCD]:

Loose, Strict, Record, Timestamp, Verbose[none]:

Sweep range of sizes [n]:

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to, timeout is 2 seconds:

Packet sent with a source address of


Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms





ilnaiduccna Thu, 08/30/2007 - 00:45

Hi Jon,

So thanks,

This type I used so many times but I don't know people called this is a extended ping, just small confusion but however my doubt been cleared by jon.

Thanks :)



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