ZyXEL MI-7248 User Guide - Page 140
VLAN Stacking Port Roles
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Chapter 26 VLAN Stacking Figure 55 VLAN Stacking Example 26.2 VLAN Stacking Port Roles Each port can have these VLAN stacking "roles": Access Port and Tunnel (the latter is for Gigabit ports only). • Select Access Port for ingress ports on the service provider's edge devices (1 and 2 in the VLAN stacking example figure). The incoming frame is treated as "untagged", so a second VLAN tag (outer VLAN tag) can be added. " Static VLAN Tx Tagging MUST be disabled on a port where you choose Normal or Access Port. • Select Tunnel Port (available for Gigabit ports only) for egress ports at the edge of the service provider's network. All VLANs belonging to a customer can be aggregated into a single service provider's VLAN (using the outer VLAN tag defined by SP VID). " Static VLAN Tx Tagging MUST be enabled on a port where you choose Tunnel Port. 140 MS-7206 User's Guide