After you configure an interface for PPP or Cisco HDLC encapsulation in the interface's Basic Properties, you can configure keepalive options.
To configure PPP keepalive options, click PPP.
To configure keepalive options:
Enter the following:
Keepalive: Select this option to have the interface send keepalive packets to its peer.
Keepalive Interval: Enter the interval, in seconds, at which keepalive packets are sent.
Down Counter: Enter the number of successive times that a destination fails to receive keepalive packets before the link is considered to be down.
Click Apply.
To configure Cisco HDLC keepalive options, click Cisco HDLC.
To configure keepalive options:
Enter the following:
Keepalive: Select this option to have the interface send keepalive packets to its peer.
Keepalive Interval: Enter the interval, in seconds, at which keepalive packets are sent.
Down Counter: Enter the number of successive times that a destination fails to receive keepalive packets before the link is considered to be down.
Up Counter: Enter the number of successive times that a destination receives a keepalive packet before the link is considered to be up.
Click Apply.
After you create a multilink interface and configure it for MLPPP encapsulation, you can configure MLPPP options for the bundle.
To configure MLPPP options, click MLPPP.
To configure MLPPP options for a multilink interface (also called a bundle):
Enter the following:
Drop Timeout: Enter the timeout, in milliseconds, for bundle links that drop one or more packets. A value of 0 means that drop timeout is disabled.
Minimum Links: Enter the minimum number of bundle links that must be up for the bundle to be considered up.
Maximum Received Reconstructed Unit: Enter the maximum packet size, in bytes, that the bundle can process..
Fragment Threshold: Enter the maximum size, in bytes, for packet payloads transmitted across individual links within the multilink circuit.
Short-Sequence MLPPP Number: Select this option to use a sequence header format of 12 bits. Deselect this option to use a sequence header format of 24 bits.
Click Apply.