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3com S7906E Installation Instruction

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1-5 
Diag 
Description 
7 Administratively 
Down 
8~31 
Reserved for future use 
 
z 
State (Sta): Current BFD session state. Its value can be 0 for AdminDown, 1 for Down, 2 for Init, 
and 3 for Up.  
z 
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.  
z 
Poll (P): If set, the transmitting system is requesting verification of connectivity, or of a parameter 
change, and is expecting a packet with the Final (F) bit in reply. If clear, the transmitting system is 
not requesting verification. 
z 
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. 
z 
Control Plane Independent(C): If set, the transmitting system's BFD implementation does not share 
fate with its control plane (in other words, 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. 
z 
Authentication Present (A): If set, the Authentication Section is present and the session is to be 
authenticated.  
z 
Reserved (R): This byte must be set to zero on transmit, and ignored on receipt. 
z 
Detect Mult: Detection time multiplier.  
z 
Length: Length of the BFD Control packet, in bytes.  
z 
My Discriminator: A unique, nonzero discriminator value generated by the transmitting system, 
used to demultiplex multiple BFD sessions between the same pair of systems.  
z 
Your Discriminator: It is the discriminator received from the corresponding remote 
system
. This 
field reflects back the received value of My Discriminator, or is 0 if that value is unknown.  
z 
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. 
z 
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. 
z 
Required Min Echo Rx Interval: This is the minimum interval, in microseconds, between received 
BFD Echo packets that this system is capable of supporting. If this value is zero, the transmitting 
system does not support the receipt of BFD Echo packets. 
z 
Auth Type: The authentication type in use, if the Authentication Present (A) bit is set. 
z 
Auth Len: The length, in bytes, of the authentication section, including the Auth Type and Auth Len 
fields.  
Supported Features 
z 
OSPF: For details, refer to OSPF Configuration and OSPF Commands in the IP Routing Volume.  
z 
IS-IS: For details, refer to IS-IS Configuration and IS-IS Commands in the IP Routing Volume. 
z 
RIP: For details, refer to RIP Configuration and RIP Commands in the IP Routing Volume. 
z 
Static routing: For details, refer to Static Routing Configuration and Static Routing Commands in 
the IP Routing Volume.