Cisco ASR 5000 Series - L-ESS Cluster Failure Handling

Veritas Cluster Installation and Management
L-ESS Cluster Failure Handling ▀
Cisco ASR 5000 Series External Storage Server Installation and Administration Guide ▄
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L-ESS Cluster Failure Handling
The L-ESS clustering application is configured to monitor the health of both the hardware and software components of
the L-ESS(s). The most typical error conditions that are accounted for, along with the expected resolution, are as
follows:
 Failure of a physical interface on the active L-ESS
 In this case, communication will be shifted to the redundant interface on the active L-ESS.
 Failure of a software process/application on the active L-ESS
 In this case, the software process will be attempted to restart.
 If this cannot be achieved in a reasonable time frame a switchover to the standby L-ESS will be
initiated.
 Failure of the redundant private interconnect between the active and standby L-ESS
 In this case, the node with maximum quorum votes will become active node and the other will be
rebooted in the standalone mode.
 Failure of the active L-ESS as a whole (e.g. power failure)
 In this case, a switchover to the standby L-ESS will be initiated.
Any and all failure scenarios, be it software or hardware, will be handled in a manner such that from the network/billing
system perspective, the L-ESS is always reachable with a consistent set of directory structures and contents.