By default, IMC generates alarms for devices which are detected to have faults. In IMC 7.x, it uses a number of monitors to check on the health of a device. This include ICMP, SNMP (polling, traps), Syslog among other things. For ICMP (Ping) packets, it generates an alarm when the "device does not respond to Ping packets". However, when the devices "recovers" meaning it now responds back to the ICMP echo request by default IMC does NOT generate notifications for these recovered devices. In network monitoring, it is very essential to know when a network is suddenly not reachable, it should notify back when it comes back online (i.e. power restored, network no longer congested). This is very important especially when monitoring a number of devices.
Kindly refer to this Post from Linsay Hill in configuring HPE IMC for Email Alerts as well as getting getting Emails Notifications for Recovered Alarms. This post is provided for version lower than IMC 7.x. which will augment the above URL this with my current Setup.
- Device Service UP
- Device SNMP Accessible
- Link State UP
- The device correctly responds to poll packets.
iMC: 10.100.1.101
Trap of Source: NETWORK-SW-3750.COMPANY.COM(10.10.0.1)
Location: NETWORK-SW-3750
Contact: IT ServiceDesk ([email protected] / 01001001) Trap Name: The device does not respond to poll packet
Severity: Critical
Trap Time: 2016-03-18 11:07:55
Description: Device "NETWORK-SW-3750" does not respond to Ping packets.
iMC: 10.100.1.101
Trap of Source: NETWORK-SW-3750.COMPANY.COM(10.10.0.1)
Location: NETWORK-SW-3750
Contact: IT ServiceDesk ([email protected] / 01001001) Trap Name: The device correctly responds to poll packets
Severity: Info
Trap Time: 2016-03-18 11:08:14
Description: Device "NETWORK-SW-3750" correctly responds to Ping packets.
Hope this helps!