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This chapter shows you how to configure VLAN mapping on the Switch.
29.1 VLAN Mapping Overview
With VLAN mapping enabled, the Switch can map the VLAN ID and priority level of packets received
from a private network to those used in the service provider's network.
The Switch checks incoming traffic from the non-management ports against the VLAN mapping
table first, the MAC learning table and then the VLAN table before forwarding them through the
Gigabit uplink port. When VLAN mapping is enabled, the Switch discards the tagged packets that do
not match an entry in the VLAN mapping table. If the incoming packets are untagged, the Switch
adds a PVID based on the VLAN setting.
Note: You can not enable VLAN mapping and VLAN stacking at the same time.
29.1.1 VLAN Mapping Example
In the following example figure, packets that carry VLAN ID 12 and are received on port 3 match a
pre-configured VLAN mapping rule. The Switch translates the VLAN ID from 12 into 123 before
forwarding the packets. Any incoming packets carrying a VLAN tag other than 12 (such as 10) and
received on port 3 will be dropped if you select to drop the packets that do not match the mapping
rule (Drop Miss).
Figure 170 VLAN mapping example
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