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Cisco 10000 Series Router Software Configuration Guide
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Chapter 17 Cisco 10000 Series Router PXF Stall Monitor
Restrictions for Cisco 10000 Series Router PXF Stall Monitor
• PXF to LC
• LC to PXF
• PXF to RP
Stall detection is based on threshold values. For example, to avoid false alarms, the number of times a
stall condition must be detected, before it is declared as a stall, is set as a threshold value. The PSM
communicates the stall condition using syslog messages.
The new stall conditions are:
• LC stall that is fixed by resetting the LC.
• RP queue stall that is fixed by resetting the Hyper Transport Data Protocol (HTDP) interface.
Recovery Actions
The Cisco 10000 Series Router PXF Stall Monitor feature provides the following primary recovery
actions:
• LC restart
• HTDP reset
The PRE switchover is a secondary action that is taken after the configured number of primary recovery
actions are executed.
Table 17-1 displays the recovery time taken for the primary and secondary actions.
Table 17-1 Recovery Time Taken for Primary and Secondary Actions
Restrictions for Cisco 10000 Series Router PXF Stall Monitor
The Cisco 10000 Series Router PXF Stall Monitor feature has the following restrictions:
• For LCs using Vanadium and Nickel10G chips, there is enhanced detection logic using the LC
FIB/TIB counter provided by Vanadium/Nickel10G. However, for LCs using Barium chips, the LC
FIB/TIB counter is not used in the detection logic. Therefore, LC-PXF stall detection is not possible
with LCs using the Barium chip.
• PSM is not supported on PRE1 and PRE2.
• The recovery time for a LC with redundancy is 6 seconds per stall.
• Only GigE SPA cards are supported. The LC to PXF stall detection is supported on SIP-600,
channelized STM-1, channelized OC12 and half-height Gigabit Ethernet line cards.
Actions Time taken
LC restart 81 seconds with minimum configuration on LC.
The LC takes 48 seconds to come up and the user
interface takes 33 seconds to come up. If line card
redundancy is supported, time can be brought
down to less than 5 seconds.
HTDP reset 4 seconds with minimum configuration.
Shutdown takes 2 seconds and HTDP takes
another 2 seconds to come up. With scaled
configuration, the time can go up to 20 seconds.
PRE switchover 2 seconds, if SSO switchover occurs.