Recovery Reference Models; Figure 40: General Gmpls Uni Interconnection Architecture - Alcatel-Lucent 7450 Manual

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Recovery Reference Models

This section details the supported recovery reference models. These models are based on the

mechanisms specified in RFC 4872 and RFC 4873.

The following figure presents a generalized reference model in which the 7x50 UNI-C nodes are

dual-homed at the link layer to the 1830 PSS UNI-N nodes. Not all elements of this architecture

may be required in all deployment cases.

This reference model includes two 7x50 nodes, each hosting a UNI-C function, at the edge of each

IP network facing two 1830 PSS nodes, each hosting a UNI-N function. A full mesh of black and

while Ethernet links interconnects neighboring UNI-C nodes and UNI-N nodes. Parallel links may

exist, so that a given 7x50 UNI-C is connected to a neighbor 1830 PSS UNI-N by more then one

Ethernet link.

Each 7x50 hosting a UNI-C has an IPCC to each of the two 1830 PSS UNI-Ns. Likewise, each

1830 PSS hosting UNI-N has an IPCC to both of the 7x50 UNI-Cs that it is connected to. IPCCs

only exist between UNI-C and UNI-N nodes, and not between UNI-C nodes. A control plane

(LMP and RSVP) adjacency therefore exists between each UNI-C and it's corresponding UNI-Ns.

Recovery in the following domains is supported in the following locations:

End to End (UNI-C to UNI-C)

UNI-C to UNI-C

Optical Segment (UNI-N to UNI-N)

OTN/photonic

>=1 parallel links

End to End — Between the 7x50 UNI-C nodes at each end of a gLSP.

UNI-C to UNI-C

7450 ESS MPLS Guide