Cisco Systems 3.6.6 manual BGP Neighbor Loss Alarm, Up Alarm, Description, Default Severity

Chapter 7 MPLS Network Faults

BGP Neighbor Loss Alarm

Table 7-1	MPLS Network Alarms Supported by Cisco ANA
Alarm		Default Severity	Description	Up Alarm
BGP Neighbor		Red (critical)	Generated whenever BGP connectivity is	BGP Neighbor
Loss			lost to a specific device.	Found
Broken LSP		Orange (major)	Activates a backward flow on the untagged	N/A
Discovered			entry to traverse the full LSP path passing
			through it. The alarm is generated whenever
			Cisco ANA locates services (such as VRFs
			and pseudowires) on the path that use the
			LSPs.
LDP Neighbor		Orange (major)	Generated whenever a TCP connection	LDP Neighbor Up
Down			failure occurs in LDP path, or the interface
			no longer runs MPLS.
MPLS Black		Dark blue	Generated whenever Cisco ANA discovers	MPLS Black Hole
Hole Found		(information)	an MPLS interface that has at least one	Cleared
			untagged LSP leading to a known PE router.
MPLS TE Tunnel		Orange (major)	Generated whenever a TE tunnel’s	MPLS TE Tunnel
Down			operational status changes to down and the	Up
			tunnel is not flapping.
MPLS TE Tunnel		Orange (major)	Generated whenever multiple up and down	MPLS TE Tunnel
Flapping			alarms are generated during a short time	Up or MPLS TE
			interval and they are suppressed.	Tunnel Down
Pseudo Wire (L2		Yellow (minor)	Generated whenever the pseudowire link	Layer 2 Tunnel Up
VPN) MPLS			goes down, namely, the pseudowire is
Tunnel Down			reported as down from both the devices
			(based on the status of the tunnel).
Tunnel		Dark Blue	Generated from a syslog message sent by	N/A
Reoptimized		(information)	the router whenever a tunnel is up and its
			route changes but the tunnel continues to
			remain up.

BGP Neighbor Loss Alarm

If BGP connectivity is lost to a specific device in an MPLS VPN network, VPN sites lose connectivity. The VNE models the BGP connection between routers and actively monitors its state. A BGP Neighbor Loss alarm is generated from both sides of the connection when a connectivity loss occurs. Alarms and tickets are issued and impact analysis information displayed.

The correlation engine identifies various faults that affect the BGP connection and reports them as the root cause for the BGP neighbor loss alarm, for example, Link Down, CPU Overutilized, and Link Data Loss.

Note BGP Neighbor Loss alarms are not correlated to each other. They are correlated to the root cause of the connectivity loss.

Cisco Active Network Abstraction 3.6.6 MPLS User Guide

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