ISPPlanet Cache Review Series - InfoLibria DynaCache 220i

Advanced Management Features
We were pleased to discover that the DynaCache can be monitored by a third-party SNMP NMS, enabling integrated fault management in larger ISP or enterprise networks.

We used Castle Rock's SNMPc to query read-only MIB objects and monitor SNMP traps. SNMP "system" objects, community strings, and trap destinations are configurable through the CLI. In addition to standard traps, a pair of enterprise traps indicate when the DynaLink goes on- or off-line. InfoLibria recommends using LAN1 or LAN2 ports for management.

Heeding this advice is important: when the DynaLink invokes bypass mode, the cache cannot be managed from (or send traps through) NetA or NetB. SNMP write access is not supported.

Consistent with its high-availability design, the DynaCache also includes self-monitoring.

Use "config monitor" commands to add URLs periodically checked for reachability. If a monitor fails, the DynaCache takes the specified action: log the event, invoke bypass mode, or shutdown caching services. Email can even be sent to the administrator. The monitor can be enabled manually or automatically whenever caching is enabled.

This is a great feature, and would be even better with a "show" command that provides a quick view of monitor status and history.

Introduction	Configuration & Script Files
Installation & Setup	DynaCaching Services
Adding DynaCache to Your Network	Keeping Tabs on the DynaCache <
Command-Line Administration	> Product Support/Final Thoughts