Abstract  Description  Claims  Drawing  Search report  Cited references 

Bidrectional Forwarding Detection (BFD)   [0017] 
Bidirectional Forwarding Detection (BFD) for IPv4 and IPv6 (Single Hop)   [0022] 
Bidirectional Forwarding Detection (BFD) on Link Aggregation Group (LAG) Interfaces   [0024]