Digisol DG-FS4528P, Management Manual

Page: 316 / 973

C
HAPTER
12 | Layer 2 Protocol Tunneling
Enabling Tunneling for Interfaces
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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 protocol packet (where STP means
STP/MSTP/PVST+), 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:
other access ports for which L2PT is enabled after decapsulating
the packet and restoring the proper protocol and MAC address
information.
all uplink ports.
When a Cisco-compatible L2PT packet is received on an access port,
and
recognized as a CDP/VTP/STP protocol packet, and
L2PT is enabled on this port, it is forwarded to the following
ports in the same S-VLAN: (a) other access ports for which L2PT
is enabled, and (b) uplink ports after rewriting the destination
address to make it a GBPT protocol packet (i.e., setting the
destination address to 01-00-0C-CD-CD-D0).
L2PT is disabled on this port, it is forwarded to the following
ports in the same S-VLAN: (a) other access ports for which L2PT
is disabled, and (b) all uplink ports.
recognized as a GBPT protocol packet (i.e., having the destination
address 01-00-0C-CD-CD-D0), and
L2PT is enabled on this port, it is forwarded to other access
ports in the same S-VLAN for which L2PT is enabled
L2PT is disabled on this port, it is forwarded to the following
ports in the same S-VLAN: (a) other access ports for which L2PT
is disabled, and (b) all uplink ports.
For L2PT to function properly, QinQ must be enabled on the switch (see
"Enabling QinQ Tunneling on the Switch" on page 334 ), and the
interface configured to 802.1Q tunnel mode (see "Adding an Interface
to a QinQ Tunnel" on page 335 ).
P
ARAMETERS
These parameters are displayed:
Spanning Tree - Spanning Tree (STP, RSTP and MSTP)
LLDP - Link Layer Discovery Protocol