Switch Features 69
Static and Dynamic MAC Address Tables
You can add static entries to the switch’s MAC address table and configure
the aging time for entries in the dynamic MAC address table. You can also
search for entries in the dynamic table based on several different criteria.
For information about viewing and managing the MAC address table, see
"Managing the MAC Address Table" on page 849.
Link Layer Discovery Protocol (LLDP)
The IEEE 802.1AB defined standard, Link Layer Discovery Protocol (LLDP),
allows the switch to advertise major capabilities and physical descriptions.
This information can help you identify system topology and detect bad
configurations on the LAN.
For information about configuring LLDP, settings see "Discovering Network
Devices" on page 651.
Link Layer Discovery Protocol (LLDP) for Media Endpoint Devices
The Link Layer Discovery Protocol for Media Endpoint Devices (LLDP-
MED) provides an extension to the LLDP standard for network configuration
and policy, device location, Power over Ethernet management, and inventory
management.
For information about configuring LLDP-MED, settings see "Discovering
Network Devices" on page 651.
Priority-based Flow Control (PFC)
The Priority-based Flow Control feature allows the switch to pause or inhibit
transmission of individual priorities within a single physical link. By
configuring PFC to pause a congested priority (priorities) independently,
protocols that are highly loss sensitive can share the same link with traffic that
has different loss tolerances. Priorities are differentiated by the priority field
of the 802.1Q VLAN header. The PowerConnect 8000-series and 8100-series
switches support lossless transport of frames on up to two priority classes.
NOTE: An interface that is configured for PFC is automatically disabled for 802.3x
flow control.
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