Smarts: Cisco CRS routers do not have PRE cards, so what does PRE mean for redundancy cards in these routers?

Products

• VMware

Environment

VMware Smart Assurance - NCM
VMware Smart Assurance - SMARTS

Resolution

Cisco Carrier Routing System (CRS) routers don   t have PRE cards, so what does PRE mean for redundancy cards in CRS routers?
What is the logic for redundancycardgroup and redundantcard if both RouteProcessors are presented inside Cisco CRS routers?




Cisco CRS routers do not have PRE cards, but redundancy cards can be created for these routers in Smarts IP using the following ASL script file:

<BASEDIR>/IP/smarts/rules/discovery/ic-cisco-rf.asl

In ic-cisco-rf.asl the card description is specified as Redundant PRE as follows:

cardObj->Description = "Redundant PRE";

Redundant cards are named as "PRE". You can modify ic-cisco-rf.asl to rename the card, but functionality is not affected. This is the same as for any other Cisco device. The data is fetched from Cisco-RF MIB, and if redundant card is present, then it is created under cardredundancy group, and Status and standbystatus are computed from the RF MIB.

Additional Information

Event computation:

CardRedundancyGroup  

event AllComponentsDown
"Indicates that all of the components in the redundancy group are down"
= if (NumberOfComponents > 0)
check (IsEveryComponentDown && !IsGroupPartOfSingleUnresponsiveSystem);

Card Down event computation

problem Down
"Indicates that a failed card is the root cause."
apriori(0.00001)
-> CardDownSymptom
if "InstrumentedBy" > 0,
CardImpact
explains;

symptom CardDownSymptom
= OperationallyDown,
NetworkAdapter_Realizes_DownOrFlappingSymptom 0.9,
NetworkAdapter_Realizes_PeerDownOrFlappingSymptom 0.9,
NetworkAdapter_Realizes_Peer_PeerDownOrFlappingSymptom 0.9,
UnitaryComputerSystem_PackagesSystems_Down 0.9,
Card_ComposedOf_Down 0.9;