Rewriting Packet Header Information

This topic discusses the following:

• Rewriting Packet Header Information Overview
• Applying Default Rewrite Rules
• Configuring Rewrite Rules
• Header Bits Preserved, Cleared, and Rewritten
• Applying Rewrite Rules to Output Logical Interfaces
• Applying IEEE 802.1p Rewrite Rules to Dual VLAN Tags
• Applying IEEE 802.1ad Rewrite Rules to Dual VLAN Tags
• Example: Per-Node Rewriting of EXP Bits
• Rewriting MPLS and IPv4 Packet Headers
• Rewriting the EXP Bits of All Three Labels of an Outgoing Packet
• Rewriting IEEE 802.1p Packet Headers with an MPLS EXP Value
• Setting Ingress DSCP Bits for Multicast Traffic over Layer 3 VPNs