From: Scott Morris (swm@emanon.com)
Date: Tue Aug 02 2005 - 21:18:02 GMT-3
H.323 voice uses udp/rtp 16384-32767
H.225 call setup uses tcp/1720
H.323 Gatekeeper uses tcp/1718-1719
Cisco Skinny uses tcp 2000, 2001 and 2002
MGCP uses tcp or udp 2747 and 2748
SIP by default uses tcp/5060
Many of these can be changed. So your mileage may vary. Anything you'll
need to know for the exam though can be found on the DocCD. Remember this
is the R&S exam, not the Voice exam.
Just my opinion,
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
????????? ???????
Sent: Tuesday, August 02, 2005 2:50 PM
To: Rajib Khan; ccielab@groupstudy.com
Subject: RE: voice acl
Hi Raj,
If you want capture all voice traffic you should understand that voice use
some ports for actually voice traffic transmission and another port range
for voice signaling traffic (for establishing and managing voice sessions).
You absolutely right that voice packets transmits via udp (rtp) and uses
16384 32767 port range.
But, port range for voice signaling depends on what actually signaling
protocol you are uses. Most wide deployed signaling protocols are H.323,
MGCP, SIP. Every of those protocols use different port range.
For example, H.323 uses tcp ports 1719 1720 (and may use another ports
depends on implemented configuration); MGCP use tcp 2000 2002.
Also you can capture voice traffic using NBAR technology !
class-map match-all Voice
match protocol rtp audio
!
--- Alexey> -----Original Message----- > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf > Of Rajib Khan > Sent: Tuesday, August 02, 2005 6:38 PM > To: ccielab@groupstudy.com > Subject: voice acl > > Hi Group, > > I help with the voice acces-list > > Would following acl recognize all voice traffic > > access-lis 101 per tcp any any eq 1720 access-lis 101 udp any any > 16384 32767 or > > access-lis 101 udp any any 16384 32767 precedence 5 -- is this line > nexessary? > > Thanks > > Raj > > > > > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > > ______________________________________________________________________ > _ Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html
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