[Asterisk-Users] (newby) Is PING a good indicator of latency?

[Damon Estep]

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
> bounces at lists.digium.com] On Behalf Of Cosmin Prund
> Sent: Wednesday, February 01, 2006 6:13 AM
> To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
> Subject: RE: [Asterisk-Users] (newby) Is PING a good indicator of
latency?
> 
> I'm pritty sure VoIP traffic would not be favored in any way along the
> route
> from my first * to my second *, but ICMP might be boosted a bit by my
ISP
> to
> look better :-)
> 
> Thanks
> 

Being an ISP I have to disagree - ICMP traffic is rarely prioritized to
"look better"

Most large ISPs actually LIMIT ICMP traffic to counter ICMP flood DOS
attacks.

That does not make it a good indicator of a networks ability to support
voip. Any cheap ATA will have jitter, delay, and packet loss counters -
hook one up and get the real picture.

If you do use ping to pre-qualify a link, grab a copy of pingplotter so
you can tune the icmp packet parameters and packet rate, run it for a
long time or several times during different timeframes to see if there
are periods of congestion.