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Chapter 6 Advanced Application Configurations
MGS3750-28F User’s Guide
38
Figure 29
Layer 2 Protocol Tunnel Screen
The following table describes the fields in this screen.
6.7 Bandwidth Control
This section shows you how you can cap the maximum bandwidth using the
Bandwidth
Control
screen.
Bandwidth control means defining a maximum allowable bandwidth for incoming and/or out-going
traffic flows on a port.
Table 22
Layer 2 Protocol Tunnel Screen
LABEL
DESCRIPTION
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.