Datasheet

11-27
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 11 Circuits and Tunnels
11.15.4 VCAT Circuit Size
autonomously remove members that have defects in the H4/Z7 byte. SW-LCAS is only available for
legacy SONET defects such as AIS-P, LOP-P, etc. SW-LCAS is optional. You can select SW-LCAS
during VCAT circuit creation. The FC_MR-4 card in line rate mode does not support SW-LCAS.
SW-LCAS allows circuit pairing for ML-Series cards over two-fiber MS-SPRing. With circuit pairing,
a VCAT circuit is set up between two ML-Series cards: one is a protected circuit (line protection) and
the other is PCA. For a four-fiber MS-SPRing, member protection cannot be mixed.
In addition, you can create non-LCAS VCAT circuits, which do not use SW-LCAS. While SW-LCAS
member cross-connects can be in different service states, all In Group non-LCAS members must have
cross-connects in the same service state. A non-LCAS circuit can mix Out of Group and In Group
members if the In Group members are in the same service state. Non-LCAS members do not support the
Locked-enabled,outOfGroup service state; to put a non-LCAS member in the Out of Group VCAT state,
use Locked-enabled,disabled.
Note Protection switching for LCAS, SW-LCAS, and non-LCAS VCAT circuits might exceed 60ms.
11.15.4 VCAT Circuit Size
Table 11-13 lists supported circuit rates and number of members for each card.
Use the Members tab in the Edit Circuit window to add or delete members from a VCAT circuit. The
capability to add or delete members depends on the card and whether the VCAT circuit is LCAS,
SW-LCAS, or non-LCAS.
• CE-100T-8 cards—Before deleting a member of an LCAS VCAT circuit, Cisco recommends that
you put the member in the Locked-enabled,outOfGroup service state. If you create non-LCAS
VCAT circuits on the CE-Series card, adding members to the circuit is possible, but
service-affecting. You cannot delete members from non-LCAS VCAT circuits without affecting the
entire VCAT circuit.
• CE-1000-4 cards—You can add or delete SW-LCAS VCAT members, although it might affect
service. Before deleting a member, Cisco recommends that you put the member in the
Locked-enabled,outOfGroup service state. If you create non-LCAS VCAT circuits , adding and
deleting members to the circuit is possible, but service-affecting.
Table 11-13 ONS 15454 SDH Card VCAT Circuit Rates and Members
Card Circuit Rate Number of Members
CE-100T-8 VC12 1–64
VC3 1–3
1
1. A VCAT circuit with a CE-Series card as a source or destination and an ML-Series card as a
source or destination can have only two members.
CE-1000-4 VC4 1–7
1
FC_MR-4 (Line rate mode) VC4 8 (1-Gbps port)
16 (2-Gbps port)
FC_MR-4 (Enhanced mode) VC4 1–8 (1-Gbps port)
1–16 (2-Gbps port)
ML-Series VC3, VC4, VC4-4c 2