Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 209)

Multi-Service IronWare Switching Configuration Guide 179
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Configuring super aggregated VLANs
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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 4090 VLANs within another VLAN. This provides a total VLAN capacity on
one Brocade device of 16,728,100 channels (4090 * 4090).
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) or
Transparent LAN Services (TLS) 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 11 shows a conceptual picture of the service that aggregated VLANs provide.
In Super Aggregated VLANs, the outer VLAN (path) and the inner VLAN (channel) use different tag
types. For example, the outer VLAN tag-type can be 9100 and the inner VLAN tag-type can be 8100
as shown in
Figure 11 .
FIGURE 11 Conceptual model of the super aggregated VLAN application