Displays the configuration and run time status for the DAD feature on the specified IP interface.
| vr_name | Specifies a VR for which to display the DAD information. |
| ip_address | Specifies an IP address for which to display the DAD information. |
| vlan_name | Specifies a VLAN (Virtual LAN) name for which to display the DAD information. |
| vlan_name | Specifies a VLAN list for which to display the DAD information. |
| tentative | Displays information for IP interfaces for which the status is up and the DAD check is incomplete. |
| valid | Displays information for IP interfaces that the DAD check has declared valid. |
| duplicate | Displays information for IP interfaces for which a duplicate IP address was detected. |
If you do not specify a VR or VRF, the command applies to the current VR context.
The vr all option displays DAD information for all IP interfaces on the switch.
The DAD check takes very little time, so you might not see the T flag (tentative address) during normal operation.
A valid IP address displays the E (interface enabled) and U (interface up) flags, and switch processes can use the IP address. If a duplicate IP address is detected after an IP address is declared valid, the D flag (duplicate address detected) also appears.
An invalid IP address does not show the U flag and might not show the E flag. If a duplicate address was detected for the invalid address, the D flag appears.
The L flag indicates an IP address for a loopback VLAN. The DAD check does not run on loopback VLANs and always marks a loopback VLAN as valid.
The following example output displays the DAD feature status for all IP interfaces in the current VR context:
IPv4 Duplicate Address Detection DAD Status : On Max Solicitation Attempts : 1 Virtual Router Interface Flags IP Address Conflict MAC Failures -------------------------------------------------------------------------------- VR-Default loop158 -ELU 81.70.100.35 00:00:00:00:00:00 0 VR-Default exL-v188 -E-U 13.224.90.90 00:04:96:12:ae:60 1 Flags : (D) Duplicate address detected, (T) Tentative address, (E) Interface enabled, (L) Loopback enabled, (U) Interface up
This command was first available in ExtremeXOS 12.6.
The vlan_list variable was added in ExtremeXOS 16.1.
This command is available on the Summit X450-G2, X460-G2, X670-G2, X770, and ExtremeSwitching X440-G2, X620, X690, X870 series switches.
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