Class Selector IP Precedence PHB

These PHBs are defined by IETF standards:

■ Default PHB: Used for Best-Effort service (bits 5 to 7 of DSCP = "000")

■ Expedited Forwarding (EF) PHB: Used for low-delay service (bits 5 to 7 of DSCP = "101")

■ Assured Forwarding (AF) PHB: Used for guaranteed bandwidth service (bits 5 to 7 of DSCP = "001," "010," "011," or "100")

■ Class-selector PHB: Used for backward compatibility with non-DiffServ-compliant devices (RFC 1812-compliant devices [bits 2 to 4 of DSCP = "000"])

Probability |

Probability |

Was this article helpful?

0 0

Post a comment