H3C core searches for the switch corresponding to the IP address

Use display ip interface or display fib ip-address commands to locate the switch interface corresponding to a specific IP address on H3C devices.

Step 1: Access the Switch CLI

Connect to the H3C switch via SSH, Telnet, or console. Enter system view to configure or view device-wide settings:

system-view

This places you in the configuration mode where you can execute interface and IP-related commands .

Step 2: Display IP Interface Information

To check which interface has a specific IP address, use:

display ip interface

This command shows detailed information for all Layer 3 interfaces, including VLAN interfaces, Ethernet interfaces, and Loopback interfaces. Look for the IP address in the output to identify the corresponding interface . For a more concise view:

display ip interface brief

This displays a summary of all interfaces, their IP addresses, administrative and protocol states, and whether the IP is primary or secondary .

Step 3: Verify Routing Information

If the IP address is part of a routed network, you can use the Forwarding Information Base (FIB) to locate the interface:

display fib ip-address

This command shows the next-hop and outgoing interface for the specified IP, helping you trace which switch interface handles traffic to that IP .

Step 4: Check ARP Cache (Optional)

For Layer 2 verification, you can check the ARP table to see which MAC address corresponds to the IP:

display arp

Then match the MAC address to the interface using:

display mac-address

This is useful if the IP is dynamically assigned or if you need to trace the physical port .

Summary

• Use display ip interface for detailed interface info.
• Use display ip interface brief for a quick overview.
• Use display fib ip-address to find the routing interface.
• Optionally, check ARP and MAC tables for Layer 2 mapping. These commands together allow you to identify the exact switch interface corresponding to any IP address on H3C switches.