Extreme Discovery Protocol

The EDP is used to gather information about neighbor Extreme Networks switches. EDP is used by the switches to exchange topology information. Information communicated using EDP includes:

Switch MAC address (switch ID)
Switch software version information
Switch IP address
Switch VLAN IP information
Switch port number
Switch configuration data: duplex and speed
Local and neighbor VLAN IDs

EDP is enabled on all ports by default, including the management port. EDP enabled ports advertise information about the Extreme Networks switch to other switches on the interface and receives advertisements from other Extreme Networks switches. Information about other Extreme Networks switches is discarded after a timeout interval is reached without receiving another advertisement.

Starting with ExtremeXOS 30.3, EDP detects mismatches when untagged ports are used in configurations where the port endpoints are used in VLANs that have different VLAN IDs. While this is not technically invalid, it nearly always indicates a mis-configuration. If a mismatch ID is detected, a log event is generated. The event is only generated once per boot. There is also a command to display port/VLAN ID endpoints for easy comparison (show edp {ports [all | ports] {detail}}).

To disable EDP on specified ports, use the following command:
disable edp ports [ports | all]
To enable EDP on specified ports, use the following command:
enable edp ports [ports | all]
To clear EDP counters on the switch, use the following command:
clear counters edp
This command clears the following counters for EDP protocol data units (PDUs) sent and received per EDP port:
- Switch PDUs transmitted
- VLAN PDUs transmitted
- Transmit PDUs with errors
- Switch PDUs received
- VLAN PDUs received
- Received PDUs with errors
To view EDP port information on the switch, use the following command:

show edp {ports [all | ports] {detail}}
To configure the advertisement interval and the timeout interval, use the following command:
configure edp advertisment-interval timer holddown-interval timeout

For information about displaying EDP status, see Displaying Port Information.