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Cisco Bug: CSCuq32280 - B2BUA call , media also sent over B2BUA - Documentation required

Last Modified

Nov 27, 2020

Products (3)

  • Cisco TelePresence Video Communication Server Software
  • Cisco TelePresence Video Communication Server Model
  • Cisco Expressway

Known Affected Releases


Description (partial)

Topology :
Endpoint(public endpoint behind ADSL NAT registered to VCS-E) -----VCS-E--Firewall---Endpoint

The problem with media happens after the VCSE receives RTP packets from the far end endpoint .

The RTP packets are also sent over B2BUA ( src IP : DMZ and dest IP : NAT'ed IP ) which is causing the firewall to report DOS as packets are coming from the same physical interface as source and destination . This may probably causing the firewall to drop these RTP packets . This requirement of RTP packets being looped needs to be documented

This happens whenever B2BUA is invoked on the VCS-E with Static NAT configuration on the VCS-E

Static NAT enabled on the VCS-E and B2BUA invoked on the VCS-E
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