Configuring Super Aggregated Vlans - Foundry Networks Switch and Router Installation And Configuration Manual

8. Select the Reload link and select Yes when the Web management interface asks you whether you really want
to reload the software. Changes to cache and table sizes do not take effect until you reload the software.
Increasing the Number of Virtual Interfaces You Can Configure
To increase the size of the virtual interface table, which determines how many virtual interfaces you can configure,
use either of the following methods.
USING THE CLI
To increase the maximum number of virtual interfaces you can configure, enter commands such as the following at
the global CONFIG level of the CLI:
NetIron(config)# system-max virtual-interface 4095
NetIron(config)# write memory
NetIron(config)# end
NetIron# reload
Syntax: system-max virtual-interface <num>
The <num> parameter indicates the maximum number of virtual interfaces. The range of valid values depends on
the device you are configuring. See Table 25.1.
USING THE WEB MANAGEMENT INTERFACE
See the Web management procedure for increasing the VLAN table size, in "Increasing the Number of VLANs You
Can Configure" on page 25-46.

Configuring Super Aggregated VLANs

You can aggregate multiple VLANs within another VLAN. This feature allows you to construct Layer 2 paths and
channels. This feature is particularly useful for Virtual Private Network (VPN) applications in which you need to
provide a private, dedicated Ethernet connection for an individual client to transparently reach its sub-net across
multiple networks.
Conceptually, the paths and channels are similar to Asynchronous Transfer Mode (ATM) paths and channels. A
path contains multiple channels, each of which is a dedicated circuit between two end points. The two devices at
the end points of the channel appear to each other to be directly attached. The network that connects them is
transparent to the two devices.
You can aggregate up to 4094 VLANs within another VLAN. This provides a total VLAN capacity on one Foundry
device of 16,760,836 channels (4094 * 4094).
The devices connected through the channel are not visible to devices in other channels. Therefore, each client
has a private link to the other side of the channel.
The feature allows point-to-point and point-to-multipoint connections.
Figure 25.19 shows a conceptual picture of the service that aggregated VLANs provide. Aggregated VLANs
provide a path for multiple client channels. The channels do not receive traffic from other channels. Thus, each
channel is a private link.
December 2000
Configuring Virtual LANs (VLANs)
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