Configuration Guide User guide

796 FastIron Configuration Guide
53-1002494-02
Super-aggregated VLAN configuration
Increasing the number of virtual routing interfaces
you can configure
To increase the maximum number of virtual routing interfaces you can configure, enter commands
such as the following at the global CONFIG level of the CLI.
Brocade(config)# system-max virtual-interface 512
Brocade(config)# write memory
Brocade(config)# end
Brocade# reload
Syntax: system-max virtual-interface <num>
The <num> parameter indicates the maximum number of virtual routing interfaces. The range of
valid values depends on the device you are configuring. Refer to Table 141.
Super-aggregated VLAN configuration
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 subnet 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 Brocade 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 86 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.