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 | vlan-id {mismatch {untagged}} {neighbor nbr}}}).

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