About TOS DiffServ
TOS and DiffServ are two different mechanisms used to achieve QoS in enterprise and service provider networks; they are two different ways of marking traffic to indicate its priority to upstream devices in the network.
For more information about TOS (packet) marking, refer to:
- IETF RFC 1349 (http://www.ietf.org/rfc/rfc1349.txt)
For more information about DiffServ, refer to:
- IETF RFC 2474 (http://www.ietf.org/rfc/rfc2474.txt)
- IETF RFC 2475 (http://www.ietf.org/rfc/rfc2475.txt).