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When a Layer 2 control PDU is received on a service provider edge port configured for

L2PT, the multicast destination MAC address is rewritten with the predefined multicast

tunnel MAC address of 01:00:0c:cd:cd:d0. The packet is transported across the provider

network transparently to the other end of the tunnel and the original multicast destination

MAC address is restored when the packet is transmitted.

If a packet is received on a tunnel interface that already has a destination multicast MAC

address of 01:00:0c:cd:cd:d0, the port enters an error state and is shut down. To clear

the error condition, the administrator must enter the clear error mac-rewrite

interface interface-name command.

L2PT can be configured on the customer edge aggregated Ethernet interface using

mac-rewrite CLI command at the [edit protocols layer2-control] hierarchy level.

The destination MAC address used by different protocols is listed in Table 41 on page 438:

Table 41: Protocol Destination MAC Addresses

MAC AddressEthernet EncapsulationProtocol

01:80:C2:00:00:03Ether (0x888E)802.1X

01:80:C2:00:00:02Ether (0x8809)802.3ah

01:00:0C:CC:CC:CCLLC (0xAAAA03)Cisco Discovery Protocol (CDP)

01:80:C2:00:00:07Ether (0x88EE)Ethernet local management interface (E-LMI)

01:80:c2:00:00:21Ether (0x88F6)MVRP VLAN Registration Protocol (MVRP)

01:80:C2:00:00:02Ether (0x8809)Link Aggregation Control Protocol (LACP)

01:80:C2:00:00:00LLC (0x424203)Spanning Tree Protocol (STP), Rapid Spanning Tree

Protocol (RSTP), and Multiple Spanning Tree

Protocol (MSTP)

01:80:C2:00:00:0EEther (0x88CC)Link Layer Discovery Protocol (LLDP)

01:80:C2:00:00:20Ether (0x88F5)Multiple MAC Registration Protocol (MMRP)

01:00:0C:CC:CC:CCLLC (0xAAAA03)VLAN Trunking Protocol (VTP)

Documentation

Layer 2 Control Protocol on ACX Series Routers on page 404•

• Configuring Layer 2 Protocol Tunneling on ACX Series on page 441

• Checking for a MAC Rewrite Error Condition Blocking Layer 2 Interface in ACX Series

on page 442

• Clearing a MAC Rewrite Error Condition Blocking a Spanning-Tree Instance Interface

in ACX Series on page 442

ACX Series Universal Access Router Configuration Guide

Juniper ACX2000 Configuration Guide

Other manuals for Juniper ACX2000