LCR has the following configuration rules.
The working and protection adapter cards in an LCR group must be configured with the same setting for the mda-mode command. In addition, the clock-mode for each card must be set to dcr-acr before the adapter card can be added to an LCR group.
In an SC-LCR group, both the working and protection adapter cards are configured with the same LCR group ID on the same node. The working and protection adapter cards must be the same type.
In an MC-LCR group, the working and protection adapter cards are configured on separate nodes. Users must ensure that the working and protection adapter cards are the same type.
A working adapter card must be created first in an LCR group. Then a protection adapter card can be added to or removed from an LCR group at any time.
The protection adapter card must be removed from the configuration before the working adapter card is removed.
A protection adapter card or working adapter card must be shut down in the config>card>mda mda-slot context before being removed from an LCR group.
A channel cannot be configured on a T1/E1 port before its associated adapter card is added to an LCR group.
A working adapter card cannot be removed from an LCR group until the associated T1/E1 channel is removed.
When adapter cards are added to an LCR group, all channel-level configurations are available only on the associated LCR ports and configuration on the physical member ports is blocked.
LCR is supported on the following cards on the 7705 SAR-8 Shelf V2 and the 7705 SAR-18:
16-port T1/E1 ASAP Adapter card
32-port T1/E1 ASAP Adapter card
To create an SC-LCR group, it is mandatory to configure a group ID and the working and protection adapter cards. Use the following CLI syntax to configure SC-LCR.
config# lcr lcr-id
working-mda mda-id
protect-mda mda-id
The following CLI syntax shows an example of configuring SC-LCR.
config# lcr lcr-1
config>lcr# working-mda 1/1
config>lcr# protect-mda 1/2
config>lcr# revert-time 5
Use the info command to display SC-LCR configuration information.
*A:7705:DUT-A>config>lcr lcr-1
*A:7705:DUT-A>config>lcr# info
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revert-time 5
working-mda 1/1
protect-mda 1/2
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To create an MC-LCR group, it is mandatory to configure the LCR ID, the working adapter card and neighbor address, and protection adapter card and neighbor address. Use the following CLI syntax to configure LCR parameters for an MC-LCR group.
config# lcr lcr-id
advertise-interval advertise-interval
hold-time hold-time
neighbor ip-address
protect-mda mda-id
revert-time minutes
working-mda mda-id
The following CLI syntax shows an example of configuring a working adapter card on a node in an MC-LCR group.
config# lcr lcr-2
config>lcr# neighbor 25.25.25.25
config>lcr# working-mda 1/1
To complete the MC-LCR configuration, log on to the protection node, configure an LCR group with the same LCR ID as the working adapter card, and configure the protection adapter card and the neighbor address. An IP link establishes a multi-chassis protocol (MCP) link between the two nodes.
The following CLI syntax shows an example of configuring a protection adapter card on a node in an MC-LCR group.
config# lcr lcr-2
config>lcr# neighbor 14.14.14.14
config>lcr# protect-mda 1/1
config>lcr# revert-time 5
Use the info command to display MC-LCR configuration information.
*A:7705:Dut-D# configure lcr lcr-2
*A:7705:Dut-D>config>lcr# info
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neighbor 14.14.14.14
revert-time 5
protect-mda 1/1
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