Cisco Cisco Expressway Manuel De Maintenance
Service/
function
function
Purpose
Expressway port
(default)
(default)
Direction
Configurable via
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 traversal port range is
36000 to 59999, and is set on the
Expressway-C at Configuration
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 (Configuration >
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 (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).
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).
2776-2777 OR
36000 – 36001 UDP
(Small / Medium
systems)
36000 – 36001 UDP
(Small / Medium
systems)
or
36000 – 36011 UDP
(Large systems)
(Large systems)
inbound
outbound
outbound
Configuration >
Local Zone >
Traversal Subzone
Traversal Subzone
Table 18 Local inbound/outbound ports (continued)
342
Cisco Expressway Administrator Guide
Reference Material