L2Pt Basics On J-Ex Series Switches - Dell PowerConnect J-EX4200-24T Software Manual

Dell PowerConnect J-Series Ethernet Switch Complete Software Guide for Junos OS

L2PT Basics on J-EX Series Switches

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L2PT is enabled on a per-VLAN basis. When you enable L2PT on a VLAN, all access
interfaces are considered to be customer-facing interfaces, all trunk interfaces are
considered to be service provider network-facing interfaces, and the specified Layer 2
protocol is disabled on the access interfaces. L2PT only acts on logical interfaces of the
family
ethernet-switching
NOTE: Access interfaces in an L2PT-enabled VLAN should not receive
L2PT-tunneled PDUs. If an access interface does receive L2PT-tunneled
PDUs, it might mean that there is a loop in the network. As a result, the
interface will be shut down.
L2PT is configured under the
meaning Q-in-Q tunneling is (and must be) enabled. If L2PT is not enabled, Layer 2 PDUs
are handled in the same way they were handled before L2PT was enabled.
NOTE: If the switch receives untagged or priority-tagged Layer 2 control PDUs
to be tunnelled, then you must configure the switch to map untagged and
priority-tagged packets to an L2PT-enabled VLAN. For more information on
assigning untagged and priority-tagged packets to VLANs, see "Understanding
Q-in-Q Tunneling on J-EX Series Switches" on page 1051 and "Configuring
Q-in-Q Tunneling (CLI Procedure)" on page 1144.
Example: Configuring Layer 2 Protocol Tunneling on J-EX Series Switches on page 1126
Example: Setting Up Q-in-Q Tunneling on J-EX Series Switches on page 1105
.
[edit vlans vlan-name dot1q-tunneling]
hierarchy level,