Licensing Requirements and Limitations for MPLS TE
Involved Network Elements
Other network elements are not required.
License Requirements
You can use the MPLS TE feature only after the MPLS function is enabled. The MPLS function is controlled by a license. By default, this function is disabled on a newly purchased switch. To use the MPLS function, apply for and purchase the license from the equipment supplier.
Version Requirements
Product Model |
Minimum Version Required |
|---|---|
CE12804/CE12808/CE12812/CE12816 |
V100R003C00 |
CE12804S/CE12808S |
V100R005C00 |
Feature Limitations
When configuring MPLS TE on the switch, pay attention to the following points:
- CE switches cannot function as PE devices on an MPLS network.
In V100R003C00 and earlier versions, MPLS TE functions can only be configured in the admin-VS.
In V100R003C10 and later versions:Among all VSs in port mode, MPLS TE functions can only be configured in the admin-VS.
MPLS TE functions can be configured in any VS in group mode.
Only the transit nodes on a TE tunnel support the fast reroute (FRR) function.
- If MPLS TE functions have been configured on the device, interfaces on the MPLS TE forwarding path cannot have TRILL functions enabled. Otherwise, MPLS TE functions do not take effect.
- NetStream and sFlow cannot sample packets encapsulated in MPLS TE tunnel.
- The traffic statistics collection period on an MPLS TE tunnel must be larger than 30s. Otherwise, the statistics are inaccurate.
- If traffic statistics collection is enabled on an MPLS TE tunnel interface and a VLANIF interface or a Layer 3 sub-interface on the tunnel, and the device receives packets with the MPLS TE tunnel interface as the next hop, the device only collects traffic statistics on the MPLS TE tunnel interface, but not on the VLANIF interface or Layer 3 sub-interface.
- In the Layer 3 virtual private network (L3VPN) over MPLS TE scenario, if traffic statistics collection is enabled for both MPLS TE tunnels and L3VPN, the function takes effect for MPLS TE traffic but not incoming L3VPN traffic.
- When multiple MPLS TE tunnels load balance traffic through ECMP or implement TE FRR, traffic statistics collection in the inbound direction of a TE tunnel becomes invalid.
In V100R005C00 or an earlier version, if the RSVP-TE handshake mechanism is not configured and the sliding window size for RSVP authentication messages is modified, the size restores the default value 1 after an upgrade to V100R005C10 or a later version.