Cisco Cisco Expressway Release Notes
Port reference
Cisco Expressway Software Release Notes (X8.2.1)
Page 13 of 18
Service/
function
function
Purpose
Expressway port
(default)
(default)
Direction Configurable via
Ephemeral
ports
ports
Various purposes.
30000 – 35999
outbound
System >
Administration
Administration
Multiplexed
traversal
media
(Assent,
H.460.19
multiplexed
media)
traversal
media
(Assent,
H.460.19
multiplexed
media)
Ports used for multiplexed media in
traversal calls. RTP and RTCP media
demultiplexing ports are allocated from
the start of the traversal media ports
range.
traversal calls. RTP and RTCP media
demultiplexing ports are allocated from
the start of the traversal media ports
range.
The default media port range is 36000
to 59999. In Large systems the first 12
ports in the range – 36000 to 36011 –
are used for multiplexed traffic only. In
Small/Medium systems you can either
explicitly specify the 2 ports to use for
multiplexed traffic or use the first 2 ports
from the media port range.
to 59999. In Large systems the first 12
ports in the range – 36000 to 36011 –
are used for multiplexed traffic only. In
Small/Medium systems you can either
explicitly specify the 2 ports to use for
multiplexed traffic or use the first 2 ports
from the media port range.
36000 – 36001
UDP (Small /
Medium systems)
UDP (Small /
Medium systems)
or
36000 – 36011
UDP (Large
systems)
UDP (Large
systems)
inbound
outbound
outbound
Configuration >
Traversal Subzone
Traversal Subzone
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 port range is 36000
to 59999. In Large systems the first 12
ports in the range – 36000 to 36011 –
are used for multiplexed traffic only. In
Small/Medium systems you can either
explicitly specify the 2 ports to use for
multiplexed traffic or use the first 2 ports
from the media port range.
to 59999. In Large systems the first 12
ports in the range – 36000 to 36011 –
are used for multiplexed traffic only. In
Small/Medium systems you can either
explicitly specify the 2 ports to use for
multiplexed traffic or use the first 2 ports
from the media port range.
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
UDP
inbound
outbound
outbound
Configuration >
Traversal > TURN
Traversal > TURN
Table 5: 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.