One-IP table records the physical connectivity of an L2 network. One-IP table is generated based on ARP and MAC tables when the system builds Layer 2 topology. You can use One-IP table to troubleshoot L2 connectivity issues and locate abnormal IP traffics.

Resolving DNS Name for Unknown End System

Generally speaking, unknown end system refers to the end systems whose DNS names are absent during the process of Layer 2 topology building. The system can resolve their DNS names by performing DNS queries through a specified DNS server.

To find out DNS names for unknown end systems, do the following:

1.Click the start menu , and select One IP table.

2.Click the icon (DNS Server Settings), speicify the IP address of the DNS server.

3.Click Resolve All DNS.

Tip: To resolve DNS name for multiple end systems, select them by pressing the Ctrl or Shift key, and then right-click to select Resolve DNS.

One-IP Table Properties

The following table introduces the table headers of the One-IP table.

Table Header


IP Address

The IP address of an end system or device interface.

LAN Segment

The LAN Segment of the IP address.

MAC Address

The MAC address related to the IP address.


The vendor of the device with the IP address. It is collected from the OUI table.

Switch Port

The switch port connected to the end system or the device interface configured with this IP address.

DNS Name

The resolved DNS name of the end system, or the combination of the device name and interface name. If the DNS name is not resolved, it is null.


The description of the switch port or device interface.

Data Source

The method to retrieve the IP address, such as device interface and ARP table.

Date Retrieved

The latest time to retrieve the data in this entry.

Tip: You can use the search function to filter out the interested data and export the search results by clicking .

Further operations:

Resolving MAC Address with Multiple IP Addresses
Only Saving Entries with Switchport Values


See also:

Cleaning Domain Data