Cisco Systems 2.5 Network Router User Manual


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Chapter 6 Edit Interface/Connection
Dialer Options
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Cisco Router and Security Device Manager 2.5 User’s Guide
OL-4015-12
Fast idle timeout
The fast idle timeout is used when one connection is active while a competing
connection is waiting to be made. The fast idle timeout sets the maximum number
of seconds with no interesting traffic before the active connection is terminated
and the competing connection is made.
This occurs when the interface has an active connection to a next hop IP address
and the interface receives interesting data with a different next hop IP destination.
Because the dialer connection is point-to-point, the competing packet cannot be
delivered until the current connection is ended. This timer sets the amount of time
that must pass while the first connection is idle before that connection will be
terminated and the competing connection made.
Enable Multilink PPP
Multilink PPP lets you load-balance data over multiple ISDN BRI B channels and
asynchronous interfaces. With multilink PPP, when an ISDN connection is
initially made, only one B channel is used for the connection. If the traffic load on
the connection exceeds the specified threshold (entered as a percentage of total
bandwidth), then a connection with a second B channel is made, and the data
traffic is shared over both connections. This has the advantage of reducing
connection time and cost when data traffic is low, and letting you use your full
ISDN BRI bandwidth when it is needed.
Check this check box if you want to enable multilink PPP. Uncheck it if you do
not.
Load Threshold
Use this field to configure the percentage of bandwidth that must be used on a
single ISDN BRI channel before another ISDN BRI channel connection will be
made to load-balance traffic. Enter a number between 1 and 255, where 255
equals 100 percent of bandwidth on the first connection being utilized.
Data Direction
Cisco SDM supports Multilink PPP only for outbound network traffic.