Fault Management302768-C Rev 00 7-5Primary and Secondary IFP DPI ConnectionsEach AP and TP card has a primary and secondary DPI connection to an IFP slot.Table 7-1 lists the valid connection for each slot. (Figure 7-1 displays themgraphically). Note that each AP and TP port also shares its secondary connectionwith 1 or 2 other slots. Only 1 slot can actively drive the secondary DPIconnection at any one time.Access Interface FailoverYou must install an access redundancy module (ARM) in interface card slot 5 ofthe Versalar 15000 chassis to enable redundant operation of the access cards.When coupled with an ARM, the AP in processor card slot 5 then serves as aredundant backup for any AP in slots 1 to 4 with similar capabilities.For example, a channelized access processor CAP-DS3 card in slot 5 can onlysupport other CAP-DS3 processor cards in slots 1 to 4. It can not serve as abackup for a CAP-M13 processor card. However, a hybrid card, such as aCAP-DS3/M13 processor card, can act as a backup for either a CAP-DS3, aCAP-M13, or another CAP-DS3/M13 processor card in slots 1 to 4.Upon removing an AP from service, the SSP verifies that a redundant AP capableof taking over the functions of the failed AP exists in slot 5. If a capable backupexists, the SSP initializes the redundant processor in slot 5 with the configurationof the failed processor. Essentially, slot 5 assumes the identity of the failed slot.Table 7-1. CAP and ATP Slot ConnectionsSlot Number Board TypePrimary IFPConnection SlotSecondary IFPConnection Slot1 CAP 6 82 CAP 6 83 CAP 7 84 CAP 7 85 CAP N/A 811 ATP 6 812 ATP 7 8
