Brocade BigIron RX Series Configuration Guide - Manual (Page 381)

BigIron RX Series Configuration Guide 303
53-1002484-04
Configuring super aggregated VLANs
11
FIGURE 24 Example super aggregated VLAN application
Figure 22 shows a collocation service providing private channels for multiple clients. Although the
same devices are used for all the clients, the VLANs ensure that each client receives its own Layer
2 broadcast domain, separate from the broadcast domains of other clients. For example, client 1
cannot ping client 5.
The clients at each end of a channel appear to each other to be directly connected and thus can be
on the same subnet and use network services that require connection to the same subnet. In this
example, client 1 is in subnet 192.168.1.0/24 and so is the device at the other end of client 1’s
channel.
Since each VLAN configured on the core devices is an aggregate of multiple client VLANs, the
aggregated VLANs greatly increase the number of clients a core device can accommodate.
This example shows a single link between the core devices. However, you can use a trunk group to
add link-level redundancy.
Configuring aggregated VLANs
A maximum of 1526 bytes are supported on ports where super-aggregated VLANs are configured.
This allows for an additional 8 bytes over the untagged port maximum to allow for support of two
VLAN tags.
Client 1
Port1/1
VLAN 101 Client 3
Port1/3
VLAN 103 Client 5
Port1/5
VLAN 105
. . . . . .
Client 1
192.168.1.69/24
209.157.2.12/24
Client 6
Port1/1
VLAN 101 Client 8
Port1/3
VLAN 103 Client 10
Port1/5
VLAN 105
. . . . . .
Ports 1/1 - 1/5
Untagged
Ports 1/1 - 1/5
Untagged
Device A
Tag Type 8100
Port2/1
Tagged Port2/1
Tagged
Device B
Tag Type 8100
Port3/1
Untagged Port3/2
Untagged
Device C
Tag Type 9100
VLAN Aggregation
Enabled
Port4/1
Tagged
Port4/1
Tagged
Device D
Tag Type 9100
VLAN Aggregation
Enabled
Port3/1
Untagged Port3/2
Untagged
Port2/1
Tagged
Port2/1
Tagged
Device E
Tag Type 8100 Device F
Tag Type 8100
Ports 1/1 - 1/5
Untagged
Ports 1/1 - 1/5
Untagged
192.168.1.129/24