Setting traffic engineering parameters for MPLS interfaces
When using constraints to determine a path for an LSP, CSPF takes into account information that is carried in generic opaque LSAs.
This information can be used to set up a path for a new LSP or to preempt an existing LSP so that an LSP with a higher priority can be established.
OSPF-TE LSAs with TE extensions include Type/Length/Value triplets (TLVs) containing the following information:
- Link type (either point-to-point or multiaccess network) (OSPF-TE LSAs only)
-
Link ID (for point-to-point links, this is the Router ID of the LSR at the other end of the link; for multi-access links, this is the address of the network’s designated router) (OSPF-TE LSAs only)
- IP address of the local interface
- IP address of the remote interface (must exist with point-to-point links)
- Traffic engineering metric for the link
- Maximum bandwidth on the interface
- Maximum reservable bandwidth on the interface
- Unreserved bandwidth on the interface
- Administrative groups to which the interface belongs
Optionally, you can specify the maximum amount of bandwidth that can be reserved on an interface. In addition, you can assign interfaces to administrative groups.