Network Reachability Monitoring

All management interfaces of provisionable servers and all platform interfaces are monitored by default by the N1 System Manager. Platform interfaces include the service processor's management interface, such as eth0, and data network interfaces, such as eth1 or eth2.

Reachability is verified for Linux servers and servers running the Solaris OS by using an ICMP ping to the interface IP address. For further information, see Discovery of Servers in the Factory Default State in Sun N1 System Manager 1.1 Installation and Configuration Guide.

The reachability of all network interfaces is verified at regular intervals. These polling intervals are configurable. For information about configuring polling intervals, see Setting Polling Intervals. The monitoring of network reachability is based on the IP address. If any monitored IP address is unreachable, an event is generated.

You can filter information for all servers by using the show server command with the appropriate parameters to view monitoring information. See show server in Sun N1 System Manager 1.1 Command Line Reference Manual for details.

It is important to distinguish between the unreachable and unknown states for provisionable servers.

N1-ok> show server health unreachable

This command lists all provisionable servers that are unreachable. Any provisionable server returned in the output of this command is unreachable due to a network problem: the server cannot be contacted about its hardware health status. The ping command to the server is unsuccessful. This does not necessarily mean that the server is not transmitting hardware health status information. The server could be in standby mode.

N1-ok> show server health unknown

This command lists all provisionable servers that are not returning any information about hardware health status. The ping command may be successful but servers returned in the output of this command are not returning any hardware health information. The monitoring agent could not be contacted on port 161.

N1-ok> show server power unreachable

This command lists all provisionable servers that are unreachable. Any server returned in the output of this command is unreachable due to a network problem: the server cannot be contacted about its power status. The ping command to the server is unsuccessful. This does not necessarily mean that the server is not transmitting power status information. The server could be in standby mode.

N1-ok> show server power unknown

This command lists all provisionable servers that are not returning any information about power status. The ping command may be successful but servers returned in the output of this command are not returning any power status information. The monitoring agent could not be contacted on port 161.

N1-ok> show server utilization unreachable

This command lists all provisionable servers that are unreachable. Any server returned in the output of this command is unreachable due to a network problem: the server cannot be contacted about its OS resource utilization. The ping command to the server is unsuccessful. This does not necessarily mean that the server is not transmitting OS resource utilization information. The server could be in standby mode.

N1-ok> show server utilization unknown

This command lists all provisionable servers that are not returning any information about OS resource utilization. The ping command may be successful but servers returned in the output of this command are not returning any OS resource utilization information. The monitoring agent could not be contacted on port 161.