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ARP Configuration
The Address Resolution Protocol (ARP) maps IP addresses to MAC addresses. ARP sets up IP-to-MAC mappings and transmits Ethernet frames over Layer 2 networks based on the mappings.
- Overview of ARP
ARP provides a mechanism for mapping IP addresses to MAC addresses to implement data forwarding through Ethernet networks. - Limitations for ARP
- Configuring Static ARP
When static ARP is used, mappings between IP addresses and MAC addresses are configured and cannot be changed on hosts or Routers. Static ARP entries are always not aged on Routers that are working properly. - Configuring Dynamic ARP
Hosts and Routers can learn dynamic ARP entries by default. However, you can adjust dynamic ARP aging parameters or optimize the ARP entry update policy. - Configuring Routed Proxy ARP
Routed proxy ARP allows devices that have IP addresses on the same network segment but different physical networks to communicate with each other. - Configuring Proxy ARP Within a VLAN
Proxy ARP within a VLAN allows communication between devices in the same VLAN but configured with interface isolation. - Configuring Proxy ARP Between VLANs
Proxy ARP between VLANs allows communication between devices in different VLANs. - Configuring Local Proxy ARP
To enable users who are isolated in the same bridge domain (BD) to communicate with each other, configure local proxy ARP. - Configuring ARP-Ping
ARP-Ping is classified as ARP-Ping IP or ARP-Ping MAC. - Configuring Unicast ARP Probe
To check whether a peer device is reachable and to enable a device to learn a peer device's MAC address, configure a local interface to send a unicast ARP request that carries the peer device's IP and MAC addresses as the destination addresses. - Configuring the Function to Send ARP Packets at a Constant Speed
This section describes how to enable a device to send ARP packets at a constant rate, so that normal services of the peer device are not affected. - Configuring Association Between ARP and Interface Status
Association between ARP and interface status allows the local device to check whether the peer device is able to properly forward packets. - Configuring the Rate of Sending ARP Broadcast Packets
- (Optional) Disabling ARP-MAC Association
The NE40E by default supports ARP-MAC association. This function allows fast updates of ARP entries and effectively guarantee real-time and stable user traffic. However, the VLANIF interface performs synchronization on the host after learning ARP entries. As a result, there are a large number of ARP entries on all LPUs. To resolve the problem, disable ARP-MAC association in scenarios where ARP entry synchronization is not required on the host. - Maintaining ARP
This section describes how to clear ARP statistics and monitor the operating status. - Configuration Examples for ARP
This section provides ARP configuration examples.
