Dell BigIron RX Series, Configuration Manual

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BigIron RX Series Configuration Guide 301
53-1002253-01
Configuring super aggregated VLANs
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The <group-id> specifies a VLAN group. If you do not use this parameter, the configuration
information for all the configured VLAN groups is displayed.
Configuring super aggregated VLANs
A super aggregated VLAN allows multiple VLANs to be placed within another VLAN. This feature
allows you to construct Layer 2 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 4089 VLANs within another VLAN. This provides a total VLAN capacity on
one device of 16,760,836 channels (4089 * 4089).
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.
Super aggregated VLANs are useful for applications such as Virtual Private Network (VPN) in which
you need to provide a private, dedicated Ethernet connection to individual clients to transparently
reach its subnet across multiple networks. The feature allows point-to-point and point-to-multipoint
connections.
Figure 23 shows a conceptual picture of the service that aggregated VLANs provide.
FIGURE 23 Conceptual model of the super aggregated VLAN application
Client 1
Client 3
Client 5
. . .
. . .
Client 1
192.168.1.69/24
Path = a single VLAN into which
client VLANs are aggregated
Channel = a client VLAN nested
inside a Path
sub-net
192.168.1.0/24