H3C Technologies H3C S12500 Series Switches - Manual (Page 26)

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Configuring proxy ARP
Proxy ARP enables a device on one network to answer ARP requests for an IP address on another
network. With proxy ARP, hosts on different broadcast domains can communicate with each other as
they would on the same broadcast domain.
Proxy ARP includes common proxy ARP and local proxy ARP.
• Common proxy ARP—Allows communication between hosts that connect to different Layer 3
interfaces and reside in different broadcast domains.
• Local proxy ARP—Allows communication between hosts that connect to the same Layer 3 interface
and reside in different broadcast domains.
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Enabling common proxy ARP
You can enable common proxy ARP in VLAN interface view, Layer 3 Ethernet interface view, Layer 3
Ethernet subinterface view, Layer 3 aggregate interface view, and Layer 3 aggregate subinterface view.
To enable common proxy ARP:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable common proxy ARP. proxy-arp enable
By default, common proxy ARP is
disabled.
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Enabling local proxy ARP
You can enable local proxy ARP in VLAN interface view, Layer 3 Ethernet interface view, Layer 3 Ethernet
subinterface view, Layer 3 aggregate interface view, and Layer 3 aggregate subinterface view.
To enable local proxy ARP:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable local proxy ARP.
local-proxy-arp enable [ ip-range
startIP to endIP ] By default, local proxy ARP is
disabled.
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Displaying proxy ARP
Execute display commands in any view.