Cisco Catalyst 2000 User Manual

256 Cisco LAN Switching Configuration Handbook
Table 14-2 Voice Protocol Port Numbers
Voice Protocol Port Description
Skinny TCP 2000 Skinny Client Control Protocol
(SCCP)
TCP 2001 Skinny Station Protocol (SSP)
TCP 2002 Skinny Gateway Protocol
(SGP)
H.323 TCP 1718
TCP 1719
TCP 1720
TCP 11000 to 11999
Gatekeeper messages
Gatekeeper RAS
H.225 call control
H.245
SIP UDP/TCP 5060 Default server ports; can also
be arbitrarily chosen
MGCP TCP 2427
TCP 2727
Call agents to gateway
Gateway to call agents
Megaco
H.248
UDP/TCP 2944
UDP/TCP 2945
Text call control messages
Binary call control messages
RTP UDP port negotiated by
voice-call signaling protocol
Voice payload transport
Access Layer Configuration
1. (Optional) Establish a trust boundary at the access layer.
a. (Optional) Trust QoS from a Cisco IP Phone:
A single QoS policy can be applied to all voice traffic from IP Phones on a com-
mon voice VLAN. This is only possible on Layer 3 switches. Otherwise, the
inbound CoS values can be trusted when IP Phones classify and mark CoS from
their own voice and data access ports. The IP Phone is instructed to control QoS
trust with the configuration in Step 3.
IOS L3
(
interface) mls qos vlan-based
(interface) mls qos trust cos
IOS L2
(interface) mls qos trust cos

Cisco Catalyst 2000 Specifications

General

Brand	Cisco
Model	Catalyst 2000
Category	Switch
Language	English