Chapter 25 Vlan; Vlan Overview - ZyXEL Communications IES4005M User Manual

Use these commands to configure general VLAN settings, transparent VLAN, VLAN TLS, VLAN
translation and aggregation, and VLAN trunking.

25.1 VLAN Overview

These sections introduce VLAN and the VLAN modes on the IES. See the later sections in this
chapter for details on the VLAN commands.
Static VLANs are created manually. Use a static VLAN to decide whether an incoming frame on a
port should be
• sent to a VLAN group as normal depending on its VLAN tag.
• sent to a group whether it has a VLAN tag or not.
• blocked from a VLAN group regardless of its VLAN tag.
You can also tag all (previously untagged) frames going out through a port with a specified VLAN
ID.
Packets on the NNI (Network Node Interface) side (uplink ports) can be any of the following:
• untagged
• tagged with a service provider VLAN ID (SVID)
• tagged with a SVID and a customer VID (CVID)
Packets on the UNI (User Network Interface) side (DSL ports) can be any of the following:
• untagged
• tagged with a CVID
• tagged with a SVID and a CVID
• the IES can pass double-tagged packets in transparent VLAN mode but discards them in the
other VLAN modes.
Other important VLAN information:
• For PTM mode, a DSL port is a logical Ethernet port.
• For ATM mode, an ATM PVC is a logical Ethernet port.
• VLAN modes can be applied to any logical port (PTM or ATM).
• A logical port can join more than one VLAN mode, but the UNI VLAN used in each joined VLAN
mode must be unique.
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