Licensing Requirements and Limitations for Re-marking

Involved Network Elements

Other network elements are not required.

Licensing Requirements

Re-marking is a basic feature of a switch and is not under license control.

Version Requirements

For details about the mapping between software versions and switch models, see the Hardware Query Tool.

Software version evolution: V100R001C00 -> V100R002C00 -> V100R003C00 -> V100R003C10 -> V100R005C00 -> V100R005C10 -> V100R006C00 -> V200R001C00 -> V200R002C50 -> V200R003C00 -> V200R005C00 -> V200R005C10 -> V200R019C00 -> V200R019C10

Feature Limitations

• For the CE12800: A traffic policy containing remark dscp cannot be applied to the outbound direction.
• In versions earlier than V200R019C10, the remark 8021p and remark dscp commands can change only the 802.1p and DSCP values of packets, but cannot change the queues where packets are scheduled. To change the queues where packets are scheduled, run the remark local-precedence command. In V200R019C10 and later versions, on models excluding the CE12800, the remark 8021p command can also change the queues where packets are scheduled.

• For the CE12800: The remark dscp and remark 8021p commands can be configured in the same traffic policy. However, the remark 8021p command is valid only for Layer 2 traffic, and the remark dscp command is valid only for Layer 3 traffic.

• For CE12800E switches, remark dscp and remark 8021p can be configured in the same traffic policy and take effect simultaneously.

• For the CE12800E: In a stack scenario, when QinQ encapsulation type is configured on a Layer 2 sub-interface used as a service access point, re-marking DSCP values of tagged IP packets does not take effect during inter-card packet forwarding. DSCP values of IP packets remain unchanged and become 0 after the packets enter a VXLAN tunnel. To solve the preceding problems, run the qos phb marking dscp enable command to enable mapping between PHBs and DSCP values in the outbound direction.

• For the CE12800E equipped with ED-E, EG-E, or EGA-E series cards: If a traffic policy containing remark 8021p is applied in the inbound direction, the traffic policy takes effect only for Layer 2 packets. In versions earlier than V200R019C10, you are advised to run the qos phb marking 8021p disable command to disable the mapping from PHBs to 802.1p values for outgoing packets. Otherwise, the priority re-marking function does not take effect. In V200R019C10 and later versions, if VLAN mapping or VLAN stacking is also configured, the mapping from PHBs to 802.1p values for outgoing packets needs to be enabled. Otherwise, the priority re-marking function does not take effect.
• For the CE12800E equipped with ED-E, EG-E, or EGA-E series cards: If a traffic policy containing remark dscp is applied in the inbound direction, you are advised to configure remark local-precedence in the traffic policy. Alternatively, run the undo qos phb marking dscp enable command to disable mapping from PHBs to DSCP priorities for outgoing packets. Otherwise, the priority re-marking function does not take effect.

• In versions earlier than V200R002C50, if the traffic policy containing remark 8021p is applied to an interface in the inbound direction and untagged packets match the traffic policy, the field about the protocol type in the packets will be modified incorrectly because the packets do not carry the VLAN ID. As a result, packets are discarded. In V200R002C50 and later versions, if the traffic policy containing remark 8021p is applied to an interface in the inbound direction, the traffic policy cannot match untagged packets.

  If 802.1p priorities of untagged packets need to be re-marked, change remark 8021p in the traffic policy to remark local-precedence and run the undo qos phb marking 8021p disable command in the system view to enable the mapping from PHBs to 802.1p priorities for outgoing packets. Otherwise, re-marking the packet will not take effect.

• In versions earlier than V200R019C00, on the CE12800, if a traffic policy containing remark dscp is applied to an interface in the inbound direction, bits 6 and 7 in the ToS field of packets are mapped to 0. The device does not support ECN for packets. In V200R019C00 and later versions, on the CE12800, if a traffic policy containing remark dscp is applied to an interface in the inbound direction, the device supports ECN for packets.

• On 48GE cards, double-tagged packets containing Layer 3 or Layer 4 fields in the outbound direction cannot be re-remarked.