Specifications

4-9
Cisco MGX 8800/8900 Series Software Configuration Guide
Release 5.1, Part Number OL-6482-01, Rev. A0, January 25, 2005
Chapter 4 Preparing Service Modules for Communication
Establishing Redundancy Between Two Service Modules
Step 2 If you have not done so already, set the firmware version for both cards, as described in the “Initializing
Service Modules” section.
Step 3 Enter the dspcds command to verify that both service modules are in the Active state.
Step 4 Enter the addred command as follows:
pop20one.7.PXM.a > addred <redPrimarySlotNum> <redSecondarySlotNum> <redType>
Replace <redPrimarySlotNum> with the slot number of the service module that will be the primary card,
and replace <redSecondarySlotNum> with the slot number of the secondary service module.
Replace <redType> with the number 1 to select 1:1 card redundancy (also called Y-cable redundancy),
or enter 2 to select 1:N redundancy. Each service module type supports only one redundancy type, and
the redundancy types are defined in the Cisco MGX 8800/8900 Hardware Installation Guide, Releases
2 - 5.1.
Note One of the two cards can be configured before redundancy is established. If this is the case, the
configured card should be specified as the primary card. Redundancy cannot be established if
the secondary card has active lines. If the secondary card has active lines, you must delete all
ports and down all lines before it can be specified as a secondary card.
Tip If the switch displays the message, ERR: Secondary cd is already reserved, then lines are
already in use on the specified secondary card. Enter the dnln command to bring down these
lines before re-entering the addred command.
Note When MPSM cards are installed on the switch, the addred command will fail if there are not
enough licenses on the secondary card (1:N redundant configurations) or in the license pool to
match the licenses already in use on the primary card.
For example, if the primary card is configured to use the ABR rate control feature, and if the
configuration of other primary cards has not already added a ABR rate control license to the
secondary card, the secondary card will require an ABR rate control license from the license
pool. If no license is available, the addred command fails.
Step 5 To verify that the redundancy relationship is established, enter the dspred command as shown in the
following example:
pop20two.7.PXM.a > dspred
pop20two System Rev: 02.01 Feb. 06, 2001 11:24:53 PST
MGX8850 Node Alarm: NONE
Primary Primary Primary Secondary Secondary Secondary Redundancy
SlotNum Type State SlotNum Type State Type
------- ------- --------- --------- --------- --------- ----------
1 AXSM Active 2 AXSM Standby 1-1
7 PXM45 Active 8 PXM45 Standby 1-1
15 SRM-3T3 Empty Res 16 SRM-3T3 Empty Resvd 1-1
31 SRM-3T3 Empty Res 32 SRM-3T3 Empty Resvd 1-1