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Defining Virtual Channel Groups

Figure 40 shows the initial Quick Configuration page for defining virtual channel groups, and Table 117 describes the related fields. Use virtual channels to avoid oversubscription of links by limiting traffic from a higher aggregated bandwidth to a lower one—for example, to limit traffic from a main office to branch offices. You channelize this traffic by applying queuing, packet scheduling, and accounting rules to logical interfaces.

Figure 40: Virtual Channel Group Quick Configuration Page

Virtual Channel
Group Quick Configuration Page

Table 117: Virtual Channel Group Quick Configuration Page Summary

Field	Function	Your Action
Virtual Channel Groups Summary
Virtual Channel Group Name	Displays names of defined virtual channel groups. Allows you to edit a virtual channel group.	To edit a virtual channel group, click its name.
Virtual Channel Name	Displays names of defined virtual channels. Allows you to edit a virtual channel.	To edit a virtual channel, click its name.
Default	Marks the default virtual channel of a group. One of the virtual channels in a group must be configured as the default channel. Any traffic not explicitly directed to a particular channel is transmitted by this channel.	None.
Scheduler Map	Displays the scheduler map assigned to a particular virtual channel.	None.
Shaping Rate	Displays the shaping rate configured for a virtual channel.	None.
Add	Opens a page that allows you to add a virtual channel group.	To add a virtual channel group, click Add.
Delete	Removes a specific virtual channel group.	To remove a specific virtual channel group, locate its name, select the check box next to it, and click Delete.
Add a Virtual Channel Group/Edit a Virtual Channel Group
Virtual Channel Group Name	Specifies a name for a virtual channel group.	To name a group, type the name—for example, wan-vc-group.
Add	Creates a virtual channel group. Opens a page that allows you to add a virtual channel to the specified group.	To create a virtual channel group, click Add.
Add a Virtual Channel/Edit Virtual Channel
Virtual Channel Name	Specifies the name of a virtual channel to be assigned to a virtual channel group.	To name a virtual channel, either select a predefined name from the list or type a new name—for example, branch1–vc.
Scheduler Map	Specifies a predefined scheduler map to assign to a virtual channel. Scheduler maps associate schedulers with forwarding classes. For information about how to define scheduler maps, see Table 116.	To specify a scheduler map, select it from the Scheduler Map list.
Shaping Rate	Specifies the shaping rate for a virtual channel. The shaper limits the maximum bandwidth transmitted by a virtual channel. Configuring a shaping rate is optional. If no shaping rate is configured, a virtual channel without a shaper can use the full logical interface bandwidth.	To specify a shaping rate, select one of the following options: To specify no shaping rate, select Unconfigured. To configure a shaping rate as an absolute number of bits per second, select Absolute Rate and type a value between 3200 and 320000000000. To configure a shaping rate as a percentage, select Percent and type a value between 0 and 100.

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