From: Colin Barber (Colin.Barber@telewest.co.uk)
Date: Fri May 16 2003 - 15:03:11 GMT-3
As I said the router will send the next ping once it receives a reply so you
will get more than one ping per second. At whatever rate the router sends
packets you will not be able to work out bandwidth as it will never fully
load a circuit.
If you have an enterprise feature set you can use the TTCP command at each
end of the link. Otherwise use a packet generator (e.g. Sniffer) to generate
large amounts of data to go across the link and then look at the load
statistics on the router's interface.
Colin
-----Original Message-----
From: balaji.balakrishnan [mailto:balaji.balakrishnan@swift.com]
Sent: 16 May 2003 18:26
To: Colin Barber
Cc: ccielab@groupstudy.com
Subject: Re: ping frequency
The very purpose of me doing ping test is to find the actual bandwidth of
the circuit. If I am doing the extended ping with time-out of 1 sec, does
it mean that I am sending ping packet every second ??
Is there any other elegant method using available cisco IOS commands to
measure the circuit performance.
Thanx
Bala.
Colin Barber wrote:
> I think the router either waits for a reply or the timeout period before
it
> sends another ping. Therefore the frequency is related to the bandwidth
and
> latency.
>
> Based on my experience I normally get between 40 and 60 pings per second @
> 1500 bytes within a LAN or high speed WAN infrastructure.
>
> Colin
>
> -----Original Message-----
> From: balaji.balakrishnan [mailto:balaji.balakrishnan@swift.com]
> Sent: 16 May 2003 16:16
> To: ccielab@groupstudy.com
> Subject: ping frequency
>
> Group,
>
> Say when you do extended ping with packet size of 1500bytes, how frequent
> router sends the ping request ? Does it send one packet
> every second.
>
> If it sends every second then the requirement bandwidth to have packet get
> through is 1500*8 = 12kbps ??? or we also need to
> consider bandwidth required for return traffic also ( ping reply ??? ). If
> so, then do we require minimum of 24kpbs to get positive
> response ??
>
> Rgds,
> Bala.
>
> [GroupStudy removed an attachment of type application/x-pkcs7-signature
> which had a name of smime.p7s]
>
>
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