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to thevolman
Re: QoS on ZyXel USG 200 and USG 50 using IPSec VPNThere are some pieces of info in the IP header that are not encapsulated. You could use them as classification criteria for QoS: - ToS: bits 8-15. It's useful if you can set this info before the packets arrive to QoS engine. Some phones are able to do this. - Lenght: bits 16-31. VoIP packets tend to be small. This will catch other small packets as well, as outgoing ACKs.
Regards. |
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I have also tried using the diff srv code points (TOS byte). The phones set this to x'46'. However, this doesn't seem to work either. I think there is something wrong with the way this device handles priority traffic in general!
I assume it is using Linux TC and I know TC can be set correctly to do this function. I hope ZyXel gets this fixed. Not having good QoS is really BAD! |