CLI Reference Guide-R05

Chapter 19 | VLAN Commands
Configuring L2PT Tunneling
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Related Commands
switchport dot1q-tunnel mode (539)
Configuring L2PT Tunneling
This section describes the commands used to configure Layer 2 Protocol Tunneling
(L2PT).
l2protocol-tunnel
tunnel-dmac
This command configures the destination address for Layer 2 Protocol Tunneling
(L2PT). Use the no form to restore the default setting.
Syntax
l2protocol-tunnel tunnel-dmac mac-address
mac-address – The switch rewrites the destination MAC address in all
upstream L2PT protocol packets (i.e, STP BPDUs) to this value, and forwards
them on to uplink ports. The MAC address must be specified in the format
xx-xx-xx-xx-xx-xx or xxxxxxxxxxxx.
The tunnel address can be any multicast address, except for the following:
■
IPv4 multicast addresses (with prefix 01-00-5E)
■
IPv6 multicast addresses (with prefix 33-33-33)
■
Addresses used by the spanning tree protocol.
Default Setting
01-12-CF-.00-00-02, proprietary tunnel address
Command Mode
Global Configuration
Command Usage
◆ When L2PT is not used, protocol packets (such as STP) are flooded to 802.1Q
access ports on the same edge switch, but filtered from 802.1Q tunnel ports.
This creates disconnected protocol domains in the customer’s network.
Table 103: L2 Protocol Tunnel Commands
Command Function Mode
l2protocol-tunnel
tunnel-dmac
Configures the destination address for Layer 2 Protocol
Tunneling
GC
switchport
l2protocol-tunnel
Enables Layer 2 Protocol Tunneling for the specified
protocol
IC
show l2protocol-tunnel Shows settings for Layer 2 Protocol Tunneling PE