H3C Technologies H3C SecBlade NetStream Cards - Manual (Page 139)

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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 an isolate-user-VLAN is configured, hosts in different secondary VLANs of the isolate-user-VLAN
need to communicate at Layer 3.
Enabling proxy ARP
Follow these steps to enable proxy ARP in VLAN interface view/Layer 3 Ethernet interface view/Layer 3
aggregate interface view:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Enable proxy ARP proxy-arp enable
Required
Disabled by default.
Follow these steps to enable local proxy ARP in VLAN interface view/Layer 3 Ethernet interface
view/Layer 3 aggregate interface view:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Enable local proxy ARP
local-proxy-arp enable [ ip-range
startIP to endIP ]
Required
Disabled by default.
Displaying and maintaining proxy ARP
To do… Use the command… Remarks
Display whether proxy ARP is
enabled display proxy-arp [ interface interface-type
interface-number ]
Available in any view
Display whether local proxy ARP is
enabled display local-proxy-arp [ interface
interface-type interface-number ]
Available in any view
Proxy ARP configuration examples
Proxy ARP configuration example
Network requirements
As shown in Figure 42 , Host A and Host D have the same prefix and mask (the IP addresses of Host A and
Host D are 192.168.10.100/16 and 192.168.20.200/16 respectively, and the two IP addresses belong