Edge-Core ECS3510-10PD, Management Manual

Page: 1154 / 1494

C
HAPTER
35
| VLAN Commands
Configuring L2CP Tunneling
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them across to the tunnel’s egress port. The egress port decapsulates
these packets, restores the proper protocol and MAC address
information, and then floods them onto the same VLANs at the
customer’s remote site (via all of the appropriate tunnel ports and
access ports
26
connected to the same metro VLAN).
◆
The way in which L2PT processes packets is based on the following
criteria – (1) packet is received on a QinQ uplink port, (2) packet is
received on a QinQ access port, or (3) received packet is Cisco-
compatible L2PT (i.e., as indicated by a proprietary MAC address).
Processing protocol packets defined in IEEE 802.1ad – Provider Bridges
◆
When an IEEE 802.1ad protocol packet is received on an uplink port
(i.e., an 802.1Q tunnel ingress port connecting the edge switch to the
service provider network)
■
with the destination address 01-80-C2-00-00-00,0B~0F (C-VLAN
tag), it is forwarded to all QinQ uplink ports and QinQ access ports
in the same S-VLAN for which L2PT is enabled for that protocol.
■
with the destination address 01-80-C2-00-00-01~0A (S-VLAN tag),
it is filtered, decapsulated, and processed locally by the switch if the
protocol is supported.
◆
When a protocol packet is received on an access port (i.e., an 802.1Q
trunk port connecting the edge switch to the local customer network)
■
with the destination address 01-80-C2-00-00-00,0B~0F (C-VLAN),
and
■
L2PT is enabled on the port, the frame is forwarded to all QinQ
uplink ports and QinQ access ports on which L2PT is enabled for
that protocol in the same S-VLAN.
■
L2PT is disabled on the port, the frame is decapsulated and
processed locally by the switch if the protocol is supported.
■
with destination address 01-80-C2-00-00-01~0A (S-VLAN), the
frame is filtered, decapsulated, and processed locally by the switch
if the protocol is supported.
Processing Cisco-compatible protocol packets
◆
When a Cisco-compatible L2PT packet is received on an uplink port, and
■
recognized as a CDP/VTP/STP/PVST+ protocol packet (where STP
means STP/RSTP/MSTP), it is forwarded to the following ports in the
same S-VLAN: (a) all access ports for which L2PT has been
disabled, and (b) all uplink ports.
■
recognized as a Generic Bridge PDU Tunneling (GBPT) protocol
packet (i.e., having the destination address 01-00-0C-CD-CD-D0),
it is forwarded to the following ports in the same S-VLAN:
26. Access ports in this context are 802.1Q trunk ports.