Our document on port mirroring can be found here. Packet captures using the Port Mirror feature on the NetVanta 7100ġ - First, you will need to set up a Port Mirror.
You will need to download Wireshark in order to perform a packet capture. Guide will take you through setting up a capture for each of these systems. This is especially true for troubleshooting VoIP issues with the NetVanta 7100 or NetVanta UC Server. Don't believe everything you read.Packet captures can often be very useful in determining issues within a network. It depends on many factors, such as the systems being used, their configuration, NATs/Firewalls, security policies, etc. Most standards and books assume they do, but in the real world that's just not the case. If wireshark didn't see the SIP packets create the call, then it won't know which UDP packets are for RTP, so again you'd have to tell it by selecting Decode As.Īs for 2 phones communicating directly with each other, the short answer is no - they sometimes do, and sometimes don't. Or the UDP packets might be the RTP media, and you simply can't see the SIP (or whatever) signaling packets. It's much harder to do this without seeing what you see.įor the UDP packets you see, when you click on one and look in the Bytes Pane, is it readable ASCII characters? If so, it might still be SIP but just not on UDP port 5060 in which case you can tell Wireshark to decode it as SIP anyway by right-clicking on the packet and selecting "Decode As." and selecting SIP protocol. The easiest way to help you is if you can post your capture file online somewhere we can get it, like on. a common one is SIP, but they do H.323 as well, and probably some proprietary stuff I don't know about. Avaya supports multiple VoIP protocols, depending on the exact software, version, etc.
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