Cisco Cisco Expressway
19
H.323: internal
Expressway-C
source port
Endpoint
listening port
Expressway-C
listening port
Endpoint
source port
Call direction
Expressway-C to endpoint
Endpoint to Expressway-C
Open firewall
n/a
n/a
IP address
IP address of
Expressway-C
Any IP address
IP address of
Expressway-C
Any IP address
IP Po
rt
s
Initial RAS
connection
connection
-
-
UDP
1719
UDP J
1719
Q 931 / H.225
signaling
signaling
TCP P
15000 to 19999
TCP G
1720
TCP M
1720
TCP K
1720
H.245
TCP P
15000 to 19999
TCP H
>= 1024
TCP P
15000 to 19999
TCP H
>= 1024
RTP
UDP Y
C
36002 to 59999 *
UDP E
>= 1024
UDP Y
C
36002 to 59999 *
UDP E
>= 1024
RTCP
UDP Y
C
36002 to 59999 *
UDP E
>= 1024
UDP Y
C
36002 to 59999 *
UDP E
>=1024
J = Endpoint RAS source port, typically 1719
P = Protocols > H.323 > Gatekeeper > Call signaling
P = Protocols > H.323 > Gatekeeper > Call signaling
port range start to end: default = 15000 to 19999
G = Endpoint signaling port, any port >= 1024,
typically 1720
M = Protocols > H.323 Call signaling TCP port: default
= 1720
K = Endpoint signaling port: any port >= 1024,
typically 1720
H = Endpoint H.245 signaling port:
= any IP port >= 1024
= 15000 to 19999 to another Expressway
= 5555 to 5574 for MXP static setting
= 11000 to 65000 for MXP dynamic setting
= 15000 to 19999 to another Expressway
= 5555 to 5574 for MXP static setting
= 11000 to 65000 for MXP dynamic setting
Y
C
= Local Zone > Traversal Subzone > Traversal
Media port start to end (configured on
Expressway-C): default =
Expressway-C): default =
36000 to 59999 *
E = Endpoint media port range; value used is specified
in codec negotiations:
= any IP port above 1024
=
= any IP port above 1024
=
36000 to 59999 *
for another Expressway
= 2326 to 2385 for MXP static setting
= 11000 to 65000 for MXP dynamic setting
= 11000 to 65000 for MXP dynamic setting
* The first 2 ports in the range are used for multiplexed traffic
only (with Large VM deployments the first 12 ports in the
range – 36000 to 36011 – are used).
Internet
Expressway-C
Expressway-E
DMZ