363-206-305
Applications
2-22
Issue 3 June 2000
OC-1 Ring Hairpin Routing, Single-Homed
2
This routing option establishes cross-connections between channels on two
separate OC-1 facilities that terminate on 27G2-U OLIU circuit packs in either the
same or different Function Units (see Figure 2-14). In the single-homed
configuration, both rotations of each of the two OC-1 rings terminate on a pair of
27G2-U OLIUs. There may be a pair of 27G2-U OLIUs that terminate both rings,
or one pair of 27G2-U OLIUs in each of two Function Units that terminate the
rings. Each rotation of one ring is cross-connected to the corresponding rotation
of the other ring. This allows traffic to be routed from one FiberReach node on one
OC-1 ring to any other FiberReach node on another OC-1 ring without using
bandwidth on the OC-3/OC-12 ring.
NOTE:
For a step-by-step provisioning example, refer to the “OC-1 Ring Hairpin
Routing, Single-Homed Example” section in Chapter 8.
Figure 2-14. Single-Homed Hairpin Routing
OC-1
DDM-2000 OC-3
OC-1
OC-3/OC-12
RING
DS1/T1
DS1/T1
DDM-2000
FiberReach
Wideband Shelf
DDM-2000
FiberReach
Wideband Shelf
DDM-2000
FiberReach
Wideband Shelf
DDM-2000
FiberReach
Wideband Shelf
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