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Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
Chapter 8 Managing PNNI Nodes and PNNI Routing
Managing Connection Grooming
Figure 8-2
Soft Reroute Method of Connection Grooming
show the incumbent connection. The master endpoint is A and the slave
endpoint is F. Endpoints B, C, D, and E are NNI endpoints. On MGX switches, only master endpoints
can initiate grooming. After the incumbent connection is chosen for rerouting, a new connection is
established using NNI endpoints B
1
, C
1
, D
1
, and E
1
as shown in the second panel. When the new
connection is ready, the master endpoint sends a release message to the slave endpoint and switches to
the new connection as shown in the third panel. When the slave endpoint receives the release, it switches
to the new connection, and the reroute is complete.
A
B
C
D
E
F
Master endpoint
A
B
C
D
E
F
B
1
C
1
E
1
D
1
After sending release
A
D
E
F
B
1
C
E
D
D
E
F
C
1
E
1
D
1
A
F
B
C
E
D
F
B
1
C
1
E
1
D
1
After receiving release
‘
‘
Slave endpoint
