HP VCX Software manual Allow Large UDP Packets, Remove Headers in 180 Responses

Chapter 10. SIP Services

Select if TCP packets with TLS content should be accepted. The recommended setting is not to accept them.

Allow Large UDP Packets

Sometimes, the SIP signaling UDP packets get larger than the standard (RFC 3261) allows. There are two ways to handle this; either send large UDP packets, which may become frag- mented into several packets, or use TCP.

Some SIP devices may not be able to receive TCP packets, which is a violation of RFC 3261. This means that you have to allow large UDP packets (larger than 1300 byte), but to do this violates section 18.1.1 in RFC 3261.

Note that there also may be SIP devices that cannot handle fragmented UDP packets, even though this also violates RFC 3261.

This setting only affects SIP signaling packets.

Select if large UDP packets should be allowed. The recommended setting is to use TCP when the packets become too large.

Remove Headers in 180 Responses

Some SIP servers require that the Contact and Record-Route headers are removed from 180 responses.

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