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Download Allied Telesis AT-8550 User`s guide
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AT-S62 Management Software Menus Interface User’s Guide A MSTI can contain more than one VLAN. This is illustrated in Figure 173 where there are two AT-8524M switches with four VLANs. There are two MSTIs, each containing two VLANs. MSTI 1 contains the Sales and Presales VLANs and MSTI 2 contains the Design and Engineering VLANs. MSTI 1 MSTI 2 AT-8524M Fast Ethernet Switch MODE STATUS LINK FAULT MODE MASTER LINK RPS MODE PWR Tagged Ports Tagged Ports AT-8524M Fast Ethernet Switch MODE LINK MODE Presales Sales Design VLAN VLAN VLAN STATUS FAULT MASTER LINK RPS MODE PWR Engineering VLAN Figure 173. Multiple VLANs in a MSTI You should note in this example that since an MSTI contains more than one VLAN, the links between the VLAN parts is made with tagged, not untagged, ports so that they can carry traffic from more than one virtual LAN. Referring again to Figure 173, the tagged link in MSTI 1 is carrying traffic for both the Presales and Sales VLANs while the tagged link in MSTI 2 is carrying traffic for the Design and Engineering VLANs. Section IV: Spanning Tree Protocols 511
