GMPLS
7450 ESS MPLS Guide Page 423
The UNI should allow the setup/maintenance/release of connections across an intermediate optical
transport network from a UNI-C router to another remote UNI-C router. The routers are connected
to an optical network that consists of optical cross connects (OXCs), and the interconnection
between the OXC and the router is based on the GMPLS UNI (RFC 4208). The UNI-C routers are
7x50 nodes, while the UNI-N OXC is the 1830 PSS. The UNI connection is instantiated using a
GMPLS LSP (gLSP).
The 7x50 UNI-C is always the initiator of the connection. The only per-connection configuration
occurs at the UNI-C, and it is operator initiated. Connections to any of the remote UNI-C routers
are signaled over the UNI. The initiation of a connection request is via CLI or SNMP to the UNI-
C router.
Signaling is based on RSVP-TE (RFC 4208). Constraints can be signaled with a connection setup
request. These include bandwidth, protection type, and latency. In the event that a connection
could not be established, a correct (descriptive) error code is returned to the initiator.
Figure 36: Dynamic Connection Setup
Use Case 2: Multi-Layer Resiliency
G.709
MPLS
UNI
BEFORE AFTER
24850
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