3Com 10014299 manual Configuring MP binding in circular DCC, Configure MP Binding in Circular DCC

Configuring DCC 721

Configuring MP Binding In DCC applications, the user can configure a traffic threshold for links. Setting the for DCC traffic threshold to 0 means that the max bandwidth of all the channels is enabled

and there is no flow control. If the traffic threshold is in the range 1 to 100, MP binding will adjust the allocated bandwidth by the actual traffic percentage. Specifically, if the percentage of the actual traffic on a link to the bandwidth exceeds the defined traffic threshold, the system will automatically enable the second link, and implement MP binding on these two links. If the percentage of the actual traffic on these two links to the bandwidth exceeds the defined traffic threshold, the system will enable the third link, and implement MP binding, so on and so forth. Thereby, an appropriate traffic can be ensured for the DCC links. On the contrary, if the percentage of the traffic of N (which is an integer greater than

2)links to the bandwidth of N-1 links is smaller than the defined traffic threshold, the system will automatically shutdown a link, so on and so forth. Thereby, the utility rate of the DCC links can be kept within an appropriate range.

Configuring MP binding in circular DCC

In a circular DCC, if a physical interface is a serial, asynchronous interface or an AUX interface, then a dialer circular group must be used to implement MP binding. (That is, it is required to configure the dialer threshold command on dialer interfaces.) If a physical interface is an ISDN BRI or PRI interface, the user can either use a dialer circular group or directly configure MP binding on the physical interface.

After the dialer threshold command is configured on a dialer interface, if the percentage of the traffic on a physical interface (or B channels) to the bandwidth exceeds the traffic threshold, the circular DCC will enable another physical interface in the dialer circular group and implement MP binding on these links. If the command is configured on an ISDN BRI or PRI physical interface, circular DCC will select available B channels on the physical interface to implement MP binding. But if all channels are busy, MP binding will be failed.

Use the dialer threshold command to configure traffic-percentage threshold in dial interface (ISDN BRI, PRI or dialer interface) view, and then perform other configurations in physical interface view.

Table 755 Configure MP Binding in Circular DCC

Operation	Command
Bundle a physical interface with the	dialer	circular-group number
specified dialer circular group.
Set the traffic-percentage threshold for	dialer	threshold traffic-percentage
MP binding	[ in-out in out ]
Restore the default traffic-percentage	undo dialer threshold
threshold of MP binding (that is, no flow
control will be implemented).
Enable PPP encapsulation.	link-protocol ppp
Configure MP binding on the physical	ppp mp	[ interface virtual-template
interface.	number	]

By default, neither MP binding nor traffic-percentage threshold is configured. That is, MP binding is not supported.