Datasheet

11-28
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 11 Circuits and Tunnels
11.16 Bridge and Roll
• 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 11-14 summarizes the VCAT capabilities for each card.
11.16 Bridge and Roll
The CTC Bridge and Roll wizard reroutes live traffic without interrupting service. The bridge process
takes traffic from a designated “roll from” facility and establishes a cross-connect to the designated “roll
to” facility. When the bridged signal at the receiving end point is verified, the roll process creates a new
cross-connect to receive the new signal. When the roll completes, the original cross-connects are
released. You can use the bridge and roll feature for maintenance functions such as card or facility
replacement, or for load balancing. You can perform a bridge and roll on the following ONS platforms:
ONS 15600, ONS 15454, ONS 15454 SDH, ONS 15327, and ONS 15310-CL.
Table 11-14 ONS 15454 SDH VCAT Card Capabilities
Card Mode
Add a
Member
Delete a
Member
Support
Locked-enabled,
outOfGroup
CE-100T-8 LCAS Yes
1
1. When adding or deleting a member from an LCAS VCAT circuit, Cisco recommends that you first put the member in the
OOS-MA,OOG service state to avoid service disruptions.
Yes
1
Yes
SW-LCASNoNoNo
Non-LCAS Yes
2
2. For CE-Series cards, you can add or delete members after creating a VCAT circuit with no protection. During the time it
takes to add or delete members (from seconds to minutes), the entire VCAT circuit will be unable to carry traffic.
Yes
2
No
CE-1000-4 LCAS No No No
SW-LCAS Yes Yes Yes
Non-LCAS Yes
2
Yes
2
No
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