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Rewriting IEEE 802.1p Packet Headers with the MPLS CoS Value

For Ethernet interfaces installed on a T-series platform or M320 router with a peer connection to an M-series router or a T-series platform, you can rewrite both MPLS CoS and IEEE 802.1p bits to a configured value (the MPLS CoS bits are also known as the EXP or experimental bits). Rewriting these bits allows you to pass the configured value to the Layer 2 VLAN path. To rewrite both the MPLS CoS and IEEE 802.1p bits, you must include the EXP and IEEE 802.1p rewrite rules in the class of service interface configuration. The EXP rewrite table is applied when you configure the IEEE 802.1p and EXP rewrite rules.

For information about how to configure the EXP and IEEE 802.1p rewrite rules, see the JUNOS Class of Service Configuration Guide.

For information on the CoS bits, see Label Allocation and Configuring Class of Service for MPLS.

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