# Monitoring Duplicate MAC Addresses Use By DHCP Local Server Clients

#### Purpose

Display duplicate MAC addresses that are being used by DHCP local server clients.Optionally, display information for a specific duplicate MAC address.

#### Action

To display information about a specific MAC address being used by multiple clients:

    host1# show ip dhcp-local duplicate-clients 00-0D-61-7F-67-70
    MAC   00-0D-61-7F-67-70
            Interface             Count           Time
            ATM 3/0.1             100             Sat Sept 17, 2005 06:00:51 UTC
            ATM 3/0.2             90              Sun Sept 18, 2005 09:00:00 UTC

#### Meaning

Table 130 lists the show ip dhcp-local duplicate-clients command output fields.

Table 130: show ip dhcp-local duplicate-clients Output Fields

Field Name | Field Description
--- | ---
MAC | Duplicate MAC address
Interface | Interfaces used by the duplicate MAC address
Count | Number of times the duplicate MAC address has been detected
Time | Date and time the first duplication was detected

#### Related Documentation

- show ip dhcp-local duplicate-clients