Preview Tool

Cisco Bug: CSCvu89214 - IOS-XE+ZBFW+CUBE: One-way Audio. TCP 5060 is not recognized as SIP.

Last Modified

Sep 03, 2020

Products (1)

  • Cisco 3G Wireless WAN

Known Affected Releases


Description (partial)

One way audio will appear for phone calls when the router is configured with IOS-XE+ZBFW+CUBE and the class map defined to match the TCP SIP packets is using an ACL.

Then, the traffic is just classified as TCP as the following:

     Session ID 0x00000036 (>( tcp SIS_OPEN
          Created 00:08:03, Last heard 00:00:03

     Session ID 0x00000045 (>( tcp SIS_OPEN

Ideally, for having a working scenario, the traffic must be recognized by ZBFW as the following:

Session ID 0x000001A6 (>( sip SIS_OPEN
       Session ID 0x000001BF (>( sip SIS_OPEN

NOTE: Use "show policy-firewall sessions platform all detail" to verify if the signaling is not being treated as SIP.

- ZBFW on router.
- CUBE on router.
- Voice solution using TCP SIP on standard port
- ACL is used in class map to match the SIP packets.
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.