In card protection, a Y cable is used to multiplex the signal from the patch panel to both the ports of active and standby interface modules. Both the active and protect ports receive the signal, but only the active port transmits the signal from its port. Protect port transmitter is disabled.

The following table shows the card protection switchover trigger and time to complete the switchover between the working and protect interface module.

• Card physical jack out convergence time for card protection switchover is more than 50 milliseconds.

• The time taken to restart the interface module due to any software error is more than 50 milliseconds.

• Alarm toggle on active or backup card causes at least one card protection switch.

• When BERT is started from the virtual controllers, the syslog displays the physical controllers instead of the virtual controller port.

The supported features are:

• Switching Mode

  • Non-revertive mode

  • Revertive mode

• Alarm Based Switchover

• SerDes Based Switchover

• Adaptive Clock Recovery (ACR) on virtual CEM

• Differential Clock Recovery (DCR) on virtual CEM

• Maintenance Commands

  • Lockout

  • Force

  • Manual

Note	All controller configurations are performed on the virtual controller.

You can create card protection with one slot (either primary or backup) and the remaining slots can be added later.

To configure maintenance commands:

enable
configure terminal
card-protection 4
primary slot 0 bay 0
backup slot 0 bay 5
end
card-protection 4
card-protection [manual {backup|primary} | force {backup|primary} | lockout]
end

Note	Maintenance commands are not synced in the standby environment. After Redundancy Force Switchover (SSO), maintenance commands must be executed again on the new active environment.

Pre-requisites

The interface module should be free from any configuration.

Configuring Card Protection Group:

enable
configure terminal
card-protection [1-16]
primary slot 0 bay 0
backup slot 0 bay 5
end

Note	The card protection number 1 to 16 refers to the Card Protection Group Number (CPGN).

Note	This is a non-revertive mode.

Configuring Virtual Card and Virtual Controller:

When card protection group is configured, it creates virtual card for card protection object, denoted by 8/x/port. Slot 8 is a fixed slot number for all card protection-created virtual card. Bay number ‘x’ is derived from the CPGN, where x=CPGN-1. Since card protection group number ranges from 1 to16, bay number ranges from 0 to 15. Virtual controllers can be configured from 8/x/0 to 8/x/47.

Physical Card Configuration:

Configures mode T3/E3 on physical controllers of both primary (0/0) and backup (0/5) card.

enable
configure terminal
controller mediatype 8/0/0
mode t3
end

Virtual Card Configuration:

• Configures mode T3/E3 on virtual controllers.

• Configures CEM on virtual controller (8/x/port).

• Configures xconnect and local connect on CEM interface.

enable
configure terminal
controller t3 8/0/0
cem 0 unframed
interface cem 8/0/0
cem 0
xconnect 11.1.1.1 112 encasulation mpls
end

Note	This is a non-revertive mode.

Note	To un-configure a CEM group under a virtual controller, first perform shutdown of the virtual controller and then un-configure the CEM group.