Cisco Cisco IOS Software Release 12.0(17)S

Remove_link_ack rcv'd

Number of Remove_link acknowledgments received.

Hello sent

Number of Hello messages sent. Hello messages notify the peer 
endpoint that the local endpoint remains in the up state.

Hello rcv'd 

Number of Hello messages received.

Hello_ack sent

Number of Hello acknowledgments sent. Hello acknowledgments 
notify the peer that hello messages have been received.

Hello_ack rcv'd

Number of Hello acknowledgments received.

outgoing pak dropped

Number of outgoing packets dropped.

incoming pak dropped

Number of incoming packets dropped.

Displays debug messages for multilink Frame Relay bundles and 
bundle links.