Unless you have a contractual agreement with a peer/transit to honor their DSCP marking, you should always reset the value.

Thomas

Marcel Leuenberger wrote:

HiYa!

Just want to ask you if it is "allowed" to reset the IP-PRECEDENCE/DSCP-Field to Zero (or any other value) at the border of an ISP network?

Means there is no problem if an IP-Transit provider reset the customers IP-PREC/DSCP field because INTERNET is best effort and therefore each ISP can do with the IP-PREC/DSCP whatever he want's because each ISP has it's own "QoS-Domain and rules"?

For me resetting the IP-PREC/DSCP is a must concerning security and to declare Internet-Traffic as BE in internal networks.

Or I am wrong and are there any existing rules in the "ISP" community relating modifying IP-PREC/DSCP?

Are you resetting the IP-PREC/DSCP as well?

Thanks and greetings,

• Marcel

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