3com MSR 20-20 참조 매뉴얼

Use the mfr stateup-respond-addlink command to configure an MFR 
interface to return ADD_LINK messages and transit the corresponding physical 
interface to the protocol ADD_SENT state when it is in protocol up state and 
receives an ADD_LINK request from the peer.

Use the undo mfr stateup-respond-addlink command to restore the default.

By default, an MFR interface does not respond to ADD_LINK requests received 
even if it is in protocol up state. This causes the peer port cannot be in protocol up 
state.

# Configure the MFR interface to return ADD_LINK messages and transit the 
corresponding physical interface to the protocol ADD_SENT state when it is in 
protocol up state and receives an ADD_LINK request from the peer.

<Sysname> system-view

[Sysname] mfr stateup-respond-addlink 

mfr timer ack seconds

Frame relay interface view

seconds: Time (in seconds) of waiting for hello acknowledgment message before 
resending hello message, in the range 1 to 10.

Use the mfr timer ack command to set the time of waiting for hello 
acknowledgment message before frame relay bundle link resends hello message.

Use the undo mfr timer ack command to restore the default.

By default, time of waiting for hello acknowledgment message before resending 
hello message is 4 seconds.

The bundle link sustains link status by periodically sending hello message to the 
peer end. If the times that a bundle link resends hello message reach the 
maximum without receiving acknowledgement from the peer, the system will 
regard the link protocol on the bundle link to be malfunctioning.

Only after the link-protocol fr mfr command is used to associate a frame relay 
bundle link interface with a frame relay bundle, can this command be configured.

mfr timer hello, mfr retry.

# Set the frame relay bundle link Serial 2/0 to wait for six seconds before resending 
hello message.