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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 10 Circuits and Tunnels
10.15 Merge Circuits
Use the Members tab on 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 if the VCAT circuit is SW-LCAS:
• FC_MR-4 (enhanced mode) card—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. You cannot add or delete members from VCAT circuits
without SW-LCAS.
• FC_MR-4 (line rate mode) card—All VCAT circuits using FC_MR-4 (line rate mode) cards have a
fixed number of members; you cannot add or delete members.
• ML-Series card—All VCAT circuits using ML-Series cards have a fixed number of members; you
cannot add or delete members.
Table 10-13 summarizes the VCAT capabilities for each card.
10.15 Merge Circuits
A circuit merge combines a single selected circuit with one or more circuits. You can merge VCTs, VCA
circuits, VLAN-assigned circuits, CTC-created circuits, and TL1-created circuits. To merge circuits, you
choose a circuit on the CTC Circuits tab window and the circuits that you want to merge with the chosen
(master) circuit on the Merge tab in the Edit Circuits window. The Merge tab shows only the circuits that
are available for merging with the master circuit:
• Circuit cross-connects must create a single, contiguous path.
• Circuits types must be a compatible. For example, you can combine a HOP with a VCA circuit to
create a longer VCA circuit, but you cannot combine a LOP with a HOP.
• Circuit directions must be compatible. You can merge a one-way and a two-way circuit, but not two
one-way circuits in opposing directions.
Table 10-12 ONS 15454 SDH Card VCAT Circuit Rates and Members
Card Circuit Rate Number of Members
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
Table 10-13 ONS 15454 SDH VCAT Card Capabilities
Card Mode
Add a
Member
Delete a
Member
Support
Locked-enabled,
outOfGroup
FC_MR-4 (enhanced mode) SW-LCAS Yes Yes Yes
Non-LCAS No No No
FC_MR-4 (line mode) Non-LCAS No No No
ML-Series SW-LCASNoNoNo
Non-LCAS No No No