Cisco Cisco Expressway Release Notes
Port reference
Unified Communications Cisco Expressway Series Software Release Notes (X8.5)
Page 17 of 23
Service/
function
function
Purpose
Expressway port
(default)
(default)
Direction Configurable via
Non-
multiplexed
media port
range
multiplexed
media port
range
Range of ports used for non-
multiplexed media. Ports are allocated
from this range in pairs, with the first
port number of each pair being an
even number.
multiplexed media. Ports are allocated
from this range in pairs, with the first
port number of each pair being an
even number.
The default media traversal port range
is 36000 to 59999, and is set on the
Expressway-C at
is 36000 to 59999, and is set on the
Expressway-C at
Configuration
> Traversal Subzone
. In Large
Expressway systems the first 12 ports
in the range – 36000 to 36011 by
default – are always reserved for
multiplexed traffic. The Expressway-E
listens on these ports. You cannot
configure a distinct range of
demultiplex listening ports on Large
systems: they always use the first 6
pairs in the media port range. On
Small/Medium systems you can
explicitly specify which 2 ports listen
for multiplexed RTP/RTCP traffic, on
the Expressway-E (
in the range – 36000 to 36011 by
default – are always reserved for
multiplexed traffic. The Expressway-E
listens on these ports. You cannot
configure a distinct range of
demultiplex listening ports on Large
systems: they always use the first 6
pairs in the media port range. On
Small/Medium systems you can
explicitly specify which 2 ports listen
for multiplexed RTP/RTCP traffic, on
the Expressway-E (
Configuration >
Traversal > Ports
). If you choose not
to configure a particular pair of ports
(Use configured demultiplexing ports
= No), then the Expressway-E will
listen on the first pair of ports in the
media traversal port range (36000 and
36001 by default).
(Use configured demultiplexing ports
= No), then the Expressway-E will
listen on the first pair of ports in the
media traversal port range (36000 and
36001 by default).
36002 – 59999
UDP (Small /
Medium systems)
UDP (Small /
Medium systems)
or
36012 – 59999
UDP (Large
systems)
UDP (Large
systems)
inbound
outbound
outbound
Configuration >
Traversal Subzone
Traversal Subzone
TURN relay
media port
range
media port
range
Range of ports available for TURN
media relay.
media relay.
24000 – 29999 UDP inbound
outbound
Configuration >
Traversal > TURN
Traversal > TURN
Table 6: Local inbound/outbound ports (continued)
Note that two services or functions cannot share the same port and protocol; an alarm will be raised if you
attempt to change an existing port or range and it conflicts with another service.
attempt to change an existing port or range and it conflicts with another service.
* On Large systems you can configure a range of TURN request listening ports. The default range is 3478 –
3483.
3483.
Remote listening ports
These tables show the default listening (destination) ports on the remote systems with which the
Expressway communicates.
Expressway communicates.
The source port on the Expressway for all of these communications is assigned from the Expressway's
ephemeral range.
ephemeral range.