Loading ...
Loading ...
Loading ...
Configuring L2PT (Only for Certain Devices) Overview
User Guide 495
The following describes the PDUs transmission procedure through the ISP network from
one customer network to the other side:
1) Upon receiving a Layer 2 PDU from CE1 via the UNI port, PE1 replaces the destination
MAC address of the PDU with a special multicast MAC address (01:00:0c:cd:cd: d0) and
then sends the PDU to the ISP network via the NNI port.
2) The ISP network identifies the PDU and directly forwards it to the other end.
3) PE2 receives the PDU via its NNI port and restores the destination MAC address of the
PDU to its original destination MAC address.
With L2PT feature configured accordingly, the switch can transparently transmit the PDUs
of the following Layer 2 protocols: STP (Spanning Tree Protocol), GVRP (GARP VLAN
Registration Protocol), LACP (Link Aggregation Control Protocol), CDP (Cisco Discovery
Protocol), VTP (VLAN Trunking Protocol), PAgP (Port Aggregation Protocol), UDLD
(UniDirectional Link Detection) and PVST+(Per VLAN Spanning Tree Plus).
Loading ...
Loading ...
Loading ...