Dell PowerConnect FCS624S Configuration Guide - Page 521

Configuring super aggregated VLANs 13 FIGURE 102 Example of a super aggregated VLAN application Client 1 Port1/1 VLAN 101 . . . Client 3 Port1/3 VLAN 103 ... Client 5 Port1/5 VLAN 105 Client 6 Port1/1 VLAN 101 ... Client 8 Port1/3 VLAN 103 ... Client 10 Port1/5 VLAN 105 Client 1 192.168.1.69/24 Ports 1/1 - 1/5 Untagged Device A Tag Type 8100 209.157.2.12/24 Device B Tag Type 8100 Ports 1/1 - 1/5 Untagged Port2/1 Tagged Port3/1 Untagged Device C VLAN Aggregation Tag Type 9100 Enabled Port3/2 Untagged Port2/1 Tagged Port4/1 Tagged Port4/1 Tagged VLAN Aggregation Enabled Device D Tag Type 9100 Port2/1 Tagged Port3/1 Untagged Port3/2 Untagged Device E Tag Type 8100 Port2/1 Tagged Device F Tag Type 8100 Ports 1/1 - 1/5 Untagged Ports 1/1 - 1/5 Untagged 192.168.1.129/24 In this example, a collocation service provides 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 channel. Because 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. PowerConnect B-Series FCX Configuration Guide 479 53-1002266-01