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Cisco Bug: CSCtf25270 - PP: MTA can be replaced with static/dynamic route

Last Modified

Nov 08, 2016

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases


Description (partial)

1) No way audio when making a call to/from a phone registered through ASA phone-proxy

2) Syslog ID 608001 shows ASA isn't opening the media session for "NP Identity IFC" for it's MTA.  For example, outside MTA is

This is Incorrect (Symptom of this bug)
%ASA-6-608001: Pre-allocate Skinny RTP secondary channel for outside: to outside: from *****StationOpenReceiveChannelAckID message

This is Correct (Media session was allocated properly):
%ASA-6-608001: Pre-allocate Skinny RTP secondary channel for NP Identity Ifc: to outside: from *****StationOpenReceiveChannelAckID message

Note: (MTA) needs to be preallocated on the "NP Identity Ifc" and NOT another interface.

3) (s)RTP stream is arriving at the ASA, but ASA is dropping it with syslog:

%ASA-2-106006: Deny inbound UDP from to on interface outside

1) Per-interface-MTA configured.  Ex)

media-termination MTA
 address interface outside
 address interface inside

2) ASA learned about one of its media-termination addresses via a static or dynamic route after phone-proxy was configured and service-policy applied
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