Licensing Requirements and Limitations for MPLS QoS
Involved Network Elements
Other network elements are not required.
License Requirements
MPLS QoS is a basic feature of a switch and is not under license control.
Version Requirements
Product Model |
Minimum Version Required |
|---|---|
CE6850-48S6Q-HI |
V100R005C00 |
CE6850-48T6Q-HI/CE6850U-HI/CE6851HI |
V100R005C10 |
CE6855HI |
V200R001C00 |
CE6856HI |
V200R002C50 |
CE6857EI |
V200R005C10 |
CE6860EI |
V200R002C50 |
CE6865EI |
V200R005C00 |
CE6870-24S6CQ-EI/CE6870-48S6CQ-EI |
V200R001C00 |
CE6870-48T6CQ-EI |
V200R002C50 |
CE6875-48S4CQ-EI |
V200R003C00 |
CE7850EI |
V100R003C10 |
CE7855EI |
V200R001C00 |
CE8850-32CQ-EI |
V200R002C50 |
CE8850-64CQ-EI |
V200R005C00 |
CE8860EI |
V100R006C00 |
CE8861E |
V200R005C10 |
CE8868EI |
V200R005C10 |
Feature Limitations
- CE switches cannot function as PE devices on an MPLS network.
- For CE6870EI and CE6875EI series switches, when configuring MPLS QoS or MPLS L3VPN QoS, you can configure the MPLS DiffServ mode only on the ingress and egress nodes. The MPLS DiffServ mode does not take effect on the transit node.
- For CE7850EI, CE6851HI, CE6850U-HI, and CE6850HI series switches, MPLS QoS on the penultimate hop device becomes invalid in MPLS PHP scenarios:
- When the penultimate hop device receives packets with multiple labels, the EXP priority of outgoing packets remains unchanged.
- When the penultimate hop device receives packets with a single label and the mapping between PHBs and DSCP priorities is enabled on the outbound interface, the DSCP priority of outgoing packets is mapped based on the configured QoS profile. If the mapping between PHBs and DSCP priorities is not enabled on the outbound interface, the DSCP priority of outgoing packets remains unchanged.
In an SVF system, if the parent switch supports MPLS QoS, the SVF system supports MPLS QoS in centralized or hybrid mode. If the parent switch and all leaf switches support MPLS QoS, the SVF system supports MPLS QoS in centralized, hybrid or distributed mode.
In V200R005C00, if the CE6856HI functions as the ingress node of the VPLS network, MPLS TTL has a fixed value of 255.
- When the CE6870EI or CE6875EI is not configured with the MPLS PHP function and uses the inner label to forward packets after the outer label pops up (for example, the switch serves as an ASBR in the inter-AS VPN Option B or inter-AS VPN Option C scenario), the EXP in the label of the forwarded packets cannot be obtained from outbound priority mappings based on the PHB, and the EXP in the inner label is used.
- On the CE6870EI or CE6875EI, the user-configured EXP value is preferred as the EXP value in the outer label of L2VPN packets. If no EXP value is configured, the EXP value in the inner label is used as the EXP value in the outer label.
In addition, MPLS QoS is developed based on MPLS LDP. For other configuration notes about MPLS LDP, see MPLS LDP Configuration Notes.
