HP 6125G Configuration Manual page 185

Diag—This bit indicates the reason for the last transition of the local session from up to some other
•
state. Table 19 lists the states.
Table 19 Diag bit values
Diag
0
1
2
3
4
5
6
7
8
9~31
State (Sta)—Current BFD session state. Its value can be 0 for AdminDown, 1 for Down, 2 for Init,
•
and 3 for Up.
Poll (P)—If set, the transmitting system is requesting verification of connectivity, or of a parameter
•
change. If clear, the transmitting system is not requesting verification.
• Final (F)—If set, the transmitting system is responding to a received BFD control packet that had the
Poll (P) bit set. If clear, the transmitting system is not responding to a Poll.
Control Plane Independent (C)—If set, the transmitting system's BFD implementation does not share
•
fate with its control plane (BFD is implemented in the forwarding plane and can continue to function
through disruptions in the control plane.) If clear, the transmitting system's BFD implementation
shares fate with its control plane.
Authentication Present (A)—If set, the Authentication Section is present, and the session is to be
•
authenticated.
Demand (D)—If set, Demand mode is active in the transmitting system. (The system wishes to
•
operate in Demand mode, knows that the session is up in both directions, and is directing the
remote system to cease the periodic transmission of BFD Control packets.) If clear, Demand mode
is not active in the transmitting system.
Reserved (R)—This byte must be set to zero on transmit and ignored on receipt.
•
• Detect Mult—Detection time multiplier.
Length—Length of the BFD control packet, in bytes.
•
My Discriminator—A unique, nonzero discriminator value generated by the transmitting system,
•
used to demultiplex multiple BFD sessions between the same pair of systems.
Your Discriminator—The discriminator received from the remote system. This field reflects back the
•
received value of My Discriminator or is 0 if that value is unknown.
Desired Min TX Interval—This is the minimum interval, in microseconds, that the local system would
•
like to use when transmitting BFD control packets. The value zero is reserved.
Required Min RX Interval—This is the minimum interval, in microseconds, between received BFD
•
control packets that this system is capable of supporting. If this value is zero, the transmitting system
does not want the remote system to send any periodic BFD control packets.
Description
No Diagnostic
Control Detection Time Expired
Echo Function Failed
Neighbor Signaled Session Down
Forwarding Plane Reset
Path Down
Concatenated Path Down
Administratively Down
Reverse Concatenated Path Down
Reserved for future use
178