Layer 3 Forward and ARP Configuration
Chapter 1 Layer 3 Management Configuration
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1-8
Switch#config
Switch (config) #ip route 10.1.5.0 255.255.255.0 10.1.2.2
Configuration of layer3 SwitchC
Switch#config
Next hop use the partner IP address
Switch(config)#ip route 10.1.1.0 255.255.255.0 10.1.2.1
Next hop use the partner IP address
Switch(config)#ip route 10.1.4.0 255.255.255.0 10.1.3.1
Configuration of layer3 SwitchB
Switch#config
Switch(config)#ip route 0.0.0.0 0.0.0.0 10.1.3.2
In this way, ping connectivity can be established between PC-A and PC-C, and PC-B and
PC-C.
1.4 ARP
1.4.1 Introduction to ARP
ARP (Address Resolution Protocol) is mainly used to resolve IP address to Ethernet
MAC address. Switch supports static ARP configuration.
1.4.2 ARP Configuration Task List
ARP Configuration Task List:
1. Configure static ARP
1. Configure static ARP
Command
Explanation
Interface Configuration Mode
arp
<ip_address> <mac_address>
no arp <ip_address>
Configures a static ARP entry; the no
command deletes a static ARP entry.
1.4.3 ARP Troubleshooting
If ping from the switch to directly connected network devices fails, the following can
be used to check the possible cause and create a solution.
Check whether the corresponding ARP has been learned by the switch.
