Runs the DAD check on the specified IP interface for which the DAD feature is enabled.
| vlan_name | Specifies a VLAN (Virtual LAN) on which to run the test. |
| vr_name | Specifies a VR on which to run the test. |
| ip_address | Specifies an IP address for which to run the test. |
If you do not specify a VR or VRF, the command applies to the current VR context.
To run the check, you must specify a VLAN name or a specific IP address. To support the check, the DAD feature must be enabled on the parent VR for the specified VLAN or IP interface.
If a duplicate address is detected during the check, the event is logged and the address remains valid if it was already valid. A valid address is an address that previously passed a DAD check (no duplicate address detected) and displays the U flag (Interface up) when the show ip dad command is entered. In this situation, the show ip dad command displays the D (duplicate address detected), E (Interface enabled), and U flags.
If the address was not already valid, the event is logged, the duplicate address transitions to duplicate address detected state, and the duplicate address displays the D flag when the show ip dad command is entered. If no duplicate IP address is detected, the specified IP interface transitions to or remains in the Interface up (U flag) state.
The following example runs the DAD check on the IP interfaces in VLAN "vlan1":
run ip dad vlan1
This command was first available in ExtremeXOS 12.6.
This command is available on the Summit X450-G2, X460-G2, X670-G2, X770, and ExtremeSwitching X440-G2, X590, X620, X690, X870 series switches.
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