IP addresses that are not managed by Entuity, e.g. on devices in the network cloud, are discovered by Entuity during traceroute and their availability state is recorded. For example, when Entuity manages objects across a cloud:
- if some, but not all, IP addresses on the device go down, Entuity will raise a Network Outage: Port Unreachable event against the ports associated with those managed IP addresses.
- Entuity determines the root cause of the failure by comparing the last known topology against the failed ping which it recognizes as being in the network cloud. Entuity adds this root cause IP address to the raised event details.
- if all IP addresses o nthe device go down, Entuity raises a Network Outage: Node Down event on the device.
- Entuity determines the root cause of the failure by comparing the last known topology against the failed ping which it recognizes as being in the network cloud. Entuity adds the root cause IP address(es) to the raised event details.
- if an associated port cannot be identified for any non-responding IP address on the device, Entuity raises a Network Outage: Managed IP Address on Device Unreachable event against the managed IP address.
- Entuity determines the root cause of the failure by comparing the last known topology against the failed ping, and recognizes that this is in the network cloud. Entuity adds this root cause IP address to the raised event details.
WAN failure
Entuity can also detect a WAN link outage, e.g. between a central office and a remote site. As Entuity monitors each component of the networking infrastructure and understands their inter-relationship, it can isolate the true cause of the service failure. For example, if all network objects on a remote site are unavailable because of a router failure, Entuity recognizes the failure is not at the remote office and does not generate symptomatic events. Instead, Entuity raises a Network Outage event that identifies the impacted devices and applications. Also:
- if Entuity manages the failed router port, the Network Outage event is raised against its device with Details identifying the outage type as Port Unreachable.
- if Entuity does not manage the failed port, but does manage the router, the Network Outage event is raised against the router with Details identifying the outage type as Managed IP Address Unreachable.
- if Entuity does not manage the failed router port nor the router, the Network Outage event is raised against the devices impacted by that failure, with the IP address of the failed object listed in the event Details.
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