Cisco Systems Cisco MGX 8850 manual dspswalm

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Cisco MGX 8850 Routing Switch Command Reference
Release 2.0, Part Number 78-10467-04 Rev C0, October 2001
Chapter9 Troubleshooting Commands
dspswalm
dspswalm
Display Switching Alarms—displays alarms for switching circuits on the PXM45.
The dspswalm command can be use d to d etermine if a card sh ou ld b e returned to Cisco f o r re pair. For
optional fault isolat ion after you execute dspswalm, use the crossbar commands to see if cr os sb ar er r ors
have occurred. The crossbar-specific commands apply to hardware or software developers who may
need analyze the b eh av io r of the switch ASIC. In the PXM45, if one s w itc h ASIC (out of three ) has
serious errors, the total swi tc h capacity falls short of t he m ax im um 45 Gbps.
The following is a top-down sequenc e o f al ar m -re lat e d co mm a nd s t ha t l ead t o is o lat in g po ssi ble faults
in the switch fabric (or crossbar):
1. dspndalms
2. dspswalms
3. dspxbaralm
4. dspxbarerrcnt
An alarm can originate in any of t he following:
•The backplane or any other part of signal path that connects a service module with a switch ASIC
•Crossbar ASIC on the PXM45
•Buffer circuitry on a service module
The definition of each alarm severity comes from Bellcore TR-NWT-000474. An alarm can be:
•Critical, indicating complete, non-recoverable failure, loss of data, and do on. The failed entity mus t
be restored. A power failure or a line being disconnected is an example.
•Major, indicating service-affecting e rrors. This event indicates that a maj or se rv ic e i s damaged or
lost, but the existing traffic is no t a ffected.
•Minor, indicating non-service affecting errors or errors on a remote node. Corrective action is
appropriate to prevent a serious fault from developing. An example is a fan failure, where no
subscribers are immediat ely affected, but calamity cou ld result if the situation p ersists. Note that an
accumulation of lower-level alarms does eq ua l a h igher-level alarm.
Cards on Which This Command Runs
PXM45
Syntax
dspswalms
Syntax Description
This command takes no parameters.
Related Commands
dspndalms, dspxbarerrcnt