BFD_1.3.6.1.4.1.2011.5.25.38.3.1 hwBfdSessDown

Description

BFD/2/BFD_DOWN_TRAP:OID [oid] Session changes to DOWN. (Index=[integer], ConfigurationName=[octet], PeerIp=[ipaddr], BindIfIndex=[integer], BindIfName=[octet], Diagnosis=[integer], BindVrfIndex=[integer], BindVpnName=[octet], SessionType=[integer], DefaultIp=[integer], BindType=[integer], StaticLspName=[octet], PwSecondary=[integer], NextHop=[ipaddr], VcId=[integer], VsiName=[octet], VsiPeerAddress=[ipaddr], DiscrAuto=[integer], PeerIpv6=[ipv6addr], Ipv6NextHop=[ipv6addr])

The trap was generated when the BFD session changed from another state to the Down state.

The statuses of the BFD session include: Up, Init, Down, and AdmDown.

Attribute

Alarm ID	Alarm Severity	Alarm Type
1.3.6.1.4.1.2011.5.25.38.3.1	Major	qualityOfServiceAlarm(3)

Parameters

Name	Meaning
oid	Indicates the MIB object ID of the alarm.
Index	Indicates the index of the BFD session.
ConfigurationName	Indicates the configuration name of the BFD session.
PeerIP	Indicates the bound destination IP address.
BindIfIndex	Indicates the index of the bound interface.
BindIfName	Indicates the name of the bound interface.
Diagnosis	Indicates information about session diagnostic characters.
BindVrfIndex	Indicates the index of the bound VPN.
BindVpnName	Indicates the name of the bound VPN.
SessionType	Indicates the type of the BFD session. 1: Static, indicates the statically configured BFD session. 2: Dynamic, indicates the dynamically established BFD session. 3: Entire_Dynamic, indicates that the establishment of a BFD session is triggered entirely dynamically. This type of BFD session is created only after the function of passively creating BFD sessions is enabled on the egress switch of the LSP. 4: Static_Auto, indicates the static BFD session that is established with automatically negotiated discriminators.
DefaultIP	Indicates the default multicast IP address.
BindType	Indicates the binding type. 1: interfaceIp, detects the Interface, and peer IP address, the single hop IP link. 2: peerIp, detects the peer IP, the multi-hop IP link. 3: sourceIp, detects the peer IP source address. 4: ifAndSourceIp, detects the Interface, peer IP and source IP address. 7: ospf, detects the OSPF. 8: isis, detects the ISIS. 9: ldpLsp, detects the LDP LSP. 10: staticLsp, detects the static LSP. 11: teLsp, detects the LSP bound to the TE tunnel. 12: teTunnel, detects the TE tunnel. 13: pw, detects the PW. 15: vsiPw, detects the VSI PW. 21: ldpTunnel, detects the LDP tunnel. 22: bgpTunnel, detects BGP tunnel.
StaticLspName	Indicates the name of the static LSP.
PwSecondary	Indicates the ID of the secondary PW.
NextHop	Indicates the IP address of the next hop.
VcId	Indicates the ID of the VC.
VsiName	Indicates the name of the VSI.
VsiPeerAddress	Indicates the destination address of the VSI.
DiscrAuto	Indicates the static auto-negotiation identifier.
PeerIpv6	Indicates the bound destination IPv6 address.
Ipv6NextHop	Indicates the next-hop IPv6 address.

Impact on the System

If the alarm function is enabled and a large number of BFD sessions flap, more CPU resources are consumed. Except for this, no service will be affected.

Possible Causes

Cause 1:

The session-bound interface goes down.

Cause 2:

The peer BFD session is deleted or shut down.

Cause 3:

The link went Down or was congested. Consequently, it failed to forward packets.

Procedure

Run the display interface command to check whether the physical status of the interface where the session resides is Up.
- If so, go to Step 2.
- If not, go to Step 6.
Check whether a message reporting alarm recovery is received.
- If so, go to Step 6.
- If not, go to Step 3.
Run the display bfd session all command to check whether the BFD sessions on the local end and on the remote end are deleted.
- If so, go to Step 6.
- If not, go to Step 4.
Run the ping ip-address command to check whether the link detected by the BFD session fails to forward packets.
- If so, go to Step 6.
- If not, go to Step 5.
Collect alarm information and configuration information, and then contact technical support personnel.
End.

Related Information

BFD_1.3.6.1.4.1.2011.5.25.38.3.2 hwBfdSessUp