Chapter 28 Layer 2 Protocol Tunneling
GS2200-24 User’s Guide
248
The following table describes the labels in this screen.
Table 78 Advanced Application > Layer 2 Protocol Tunneling
LABEL DESCRIPTION
Active Select this to enable layer 2 protocol tunneling on the Switch.
Destination
MAC Address
Specify a MAC address with which the Switch uses to encapsulate the
layer 2 protocol packets by replacing the destination MAC address in the
packets.
Note: The MAC address can be either a unicast MAC address or
multicast MAC address. If you use a unicast MAC address,
make sure the MAC address does not exist in the address
table of a switch on the service provider’s network.
Note: All the edge switches in the service provider’s network should
be set to use the same MAC address for encapsulation.
Port This field displays the port number.
* Use this row to make the setting the same for all ports. Use this row first
and then make adjustments on a port-by-port basis.
Note: Changes in this row are copied to all the ports as soon as you
make them.
CDP Select this option to have the Switch tunnel CDP (Cisco Discovery
Protocol) packets so that other Cisco devices can be discovered through
the service provider’s network.
STP Select this option to have the Switch tunnel STP (Spanning Tree Protocol)
packets so that STP can run properly across the service provider’s
network and spanning trees can be set up based on bridge information
from all (local and remote) networks.
VTP Select this option to have the Switch tunnel VTP (VLAN Trunking Protocol)
packets so that all customer switches can use consistent VLAN
configuration through the service provider’s network.
Point to Point The Switch supports PAgP (Port Aggregation Protocol), LACP (Link
Aggregation Control Protocol) and UDLD (UniDirectional Link Detection)
tunneling for a point-to-point topology.
Both PAgP and UDLD are Cisco’s proprietary data link layer protocols.
PAgP is similar to LACP and used to set up a logical aggregation of
Ethernet ports automatically. UDLD is to determine the link’s physical
status and detect a unidirectional link.
PAGP Select this option to have the Switch send PAgP packets to a peer to
automatically negotiate and build a logical port aggregation.
LACP Select this option to have the Switch send LACP packets to a peer to
dynamically creates and manages trunk groups.
UDLD Select this option to have the Switch send UDLD packets to a peer’s port
it connected to monitor the physical status of a link.
