RE: Help: Port Number for VOIP and Others

From: Jonathan V Hays (jhays@jtan.com)
Date: Sat Oct 18 2003 - 14:03:15 GMT-3

The easiest thing to do is memorize these port ranges. But if you freeze
up during the exam, there are other ways to remember the ports. TCP 1720
is will show up in debug after you execute a "csim start" so that one is
pretty easy.

For the RTP packets (UDP 16384-32767) there are numerous references
scattered across the QoS section of the IOS 12.2 portion of the DocCD to
refresh your memory.

Also, note the fact that 16384+16383=32767 which comes in handy for the
"ip rtp priority" command (and its frame-relay equivalent). These
commands use starting-port-number followed by port-number-range, rather
than starting and ending port number.

Here's just a couple of QoS links and appropriate excerpts.

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/
fqos_c/fqcprt2/qcfwfq.htm#1002069

! The following command reserves a strict priority queue:
Router(config-if)# ip rtp priority 16384 16383 40 

----

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/
fqos_r/qrfcmd4.htm#1035661

Examples 

The following example first defines a CBWFQ configuration and then
reserves a strict priority queue with the following values: a starting
RTP port number of 16384, a range of 16383 UDP ports, and a maximum
bandwidth of 40 kbps: 
----

My recent reading infers that either TCP 1720 (Fast Connect) is used for
call setup or TCP 11000-11999 (Standard Connect), but not both. 
The VOIP experts can correct me on this.

This DocCD link shows all the common voice ports, and it also includes
11000 11999. But it is not easy to find unless you spend a lot of time
in the CiscoWorks documentation. Here's how to navigate there:

From the Documentation Home page
 Network Management
  CiscoWorks
   QoS Policy Manager
    QoS Policy Manager 3.1
     Getting Started with CiscoWorks QoS Policy Manager 3.1 
      QoS Analysis Tutorial 
       Lesson 4-2: Monitoring QoS

http://www.cisco.com/univercd/cc/td/doc/product/rtrmgmt/qos/qpm3_1/qpm31
gs/ktmon.htm#1032302

Table 4-3   QoS Monitoring Demo Policies

Policy Order  Policy Name  Filter  Action  
1 
 RealTime 
 or Protocol: UDP and destination = Ports 16384 to 32767 
 Priority: LLQ enabled (a type of queuing) 
 Bandwidth: 33% (CBQ bandwidth allocation, a type of queuing) 
 
2 
 VoiceControl 
 or Protocol: TCP and destination = Ports 11000 to 11999 
 or Protocol: TCP and destination = Port 1720 
 Bandwidth: 2% 
 

HTH,

Jonathan

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
asadovnikov
Sent: Saturday, October 18, 2003 1:39 AM
To: 'k c'; ccielab@groupstudy.com
Subject: RE: Help: Port Number for VOIP and Others

I trust you need
	udp 16384 - 32767
	tcp 1720
	tcp 11000 - 11999

There are a number of references, including one attached in the
archives,
and here is an additional link:
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_white_pape
r091
86a0080117fdc.shtml

But I do not know where it is on documentation CD.

Best regards,
Alexei

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Jonathan V Hays
Sent: Monday, July 21, 2003 10:28 AM
To: 'Snow, Tim'; 'Rivalino YMT.'; ccielab@groupstudy.com
Subject: RE: Voice and Data packet in CBWFQ

If you are going to specify TCP port 1720 you might also specify TCP
ports
11000 11999 using "range 11000 11999" for H.245, which is also part of
standard connect call setup under the H.323 architecture.

TCP port 1720 is only part of call setup and could be said (more
accurately) to be used by H.225.

The ITU H.323 specification describes an architecture that defines a set
of
specific functions for framing and call control, codecs, and  data
communications. The H.323 framing and call control functions are in turn
specified by the H.225 specification. H.225 defines the details of the
RTP
and RTCP functions, such as logical framing, sequence numbering, error
detection and so forth.

H.245 provides the call control mechanism that allows H.323-compatible
terminals interconnection and specifies the signaling, flow control, and
channeling for messages, requests, and commands.

From "Cisco AVVID Network Infrastructure Enterprise Quality of Service
Design" found at 

http://www.cisco.com/en/US/netsol/netwarch/ns19/ns24/networking_solution
s_pa
ckages_list.html

<quote>
H.323 Protocol
Cisco CallManager communicates with H.323 gateways using TCP ports 1720
(H.225) and 11xxx
(H.245).
</quote>

Also, for everyone's future reference, the following document lists
other
possible ports, if you are using other types of voice traffic.

http://www.cisco.com/warp/public/788/voice-qos/voip-ov-fr-qos.html#topic
6

<quote>
The following list serves as reference for the ports used by VoIP
signaling
and control channels:

H.323/H.225 = TCP 1720

H.323/H.245 = TCP 11xxx (Standard Connect)

H.323/H.245 = TCP 1720 (Fast Connect)

H.323/H.225 RAS = TCP 1719

SCCP = TCP 2000-2002 (CM Encore)

ICCP = TCP 8001-8002 (CM Encore)

MGCP = UDP 2427, TCP 2428 (CM Encore)

SIP= UDP 5060, TCP 5060 (configurable) 

</quote>

Hope that clarifies.

Jonathan

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
k c
Sent: Saturday, October 18, 2003 12:34 AM
To: ccielab@groupstudy.com
Subject: Help: Port Number for VOIP and Others

If we are asking to create an access list to allow call setup, ring tone
and
H.245 negotiation, where can I find the port numbers in the DocCD?
 

(b-S$H*:)/9B!B6C%@(N$H!B9J(#...
.v:)9aAn  1!$_3sC4
http://ringtone.yahoo.com.hk/

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