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Cisco IOS XE Integrated Session Border Controller Configuration Guide for the Cisco ASR 1000 Series Aggregation Services Routers
OL-15421-01
Chapter 7 H.248 Services—Signaling and Control
Optional Local and Remote Descriptors
Packets Received: 2249
Packets Sent: 2272
Packets Discarded: 465
Data Received: 263 (bytes)
Data Sent: 266 (bytes)
Data Discarded: 54 (bytes)
GM Discarded Packets: 0
Time To Recovery: Not known
RTCP Packets Sent: Not known
RTCP Packets Received: Not known
RTCP Packets Lost: Not known
DTMF Interworking: No
Media Flowing: Yes
Unexpected SrcAddr Packets: No
Billing ID: 000000000000000000000000000000000000000000000000
Media directions allowed: sendrecv
Optional Local and Remote Descriptors
The media gateway controller (MGC) can specify one or more local and remote descriptors in a Modify
command because the MGC does not always specify the descriptors in a single Add command. A
descriptor might be an address or port allocation or bandwidth reservation.
The DBE process for adding or modifying local and remote descriptors is as follows:
• The DBE accepts Add or Modify commands for a termination with zero or one local descriptor and
zero or one remote descriptor for each stream.
• The DBE reserves resources for a pinhole when the first local descriptor for either side of the pinhole
is specified. This includes, but is not necessarily limited to, address and port allocation and
bandwidth reservation. If the DBE resource reservation fails, then one of the following may occur:
–
If the Ginfo package is in use and the Ginfo or gate_state is provisional, then the gate is deleted
and the A
dd or Modify request is returned with error 510 “failure response code of insufficient
resources.”
–
The gate reverts to its previous state and the Add or Modify request is returned with error 510
“failure response code of insufficient resources.” MGC deletes the gate if required.
DBE Restrictions
The following are restrictions of DBE support for this feature:
• As with current behavior, the DBE rejects attempts to change the addresses and ports in the local
descriptor once they have been selected.
• Partially specified terminations (those without both a local and remote descriptor) must have a
termination state of OutOfService. If an attempt is made to place a partially specified termination
InService, then the request is rejected with error 421, “Unknown action or illegal combination of
actions response.”