H3C Technologies H3C SecPath F1000-E - Manual (Page 282)

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Local proxy ARP
As shown in Figure 164 , Host A and Host B belong to VLAN 2, but are isolated at Layer 2. Host A
connects to Ethernet 1/3 while Host B connects to Ethernet 1/1. Enable local proxy ARP on Router to
allow Layer 3 communication between the two hosts.
Figure 164 Application environment of local proxy ARP
Enable local proxy ARP in one of the following cases:
• Hosts connecting to different isolated Layer 2 ports in the same VLAN need to communicate at Layer
3.
• If a super VLAN is configured, hosts in different sub VLANs of the super VLAN need to communicate
at Layer 3.
• If an isolate-user-VLAN is configured, hosts in different secondary VLANs of the isolate-user-VLAN
need to communicate at Layer 3.
Enabling common proxy ARP
To enable common proxy ARP in VLAN interface view/Layer 3 Ethernet interface view/Layer 3
aggregate interface view:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable proxy ARP. proxy-arp enable Disabled by default
Enabling local proxy ARP
To enable local proxy ARP in VLAN interface view/Layer 3 Ethernet interface view/Layer 3 aggregate
interface view: