H3C Technologies H3C S12500 Series Switches - Manual (Page 165)

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Figure 63 Application environment of local ND proxy
Because Host A's IPv6 address is on the same subnet as Host B's, Host A directly sends an NS
message to obtain Host B's MAC address. However, Host B cannot receive the NS message
because they belong to different VLANs.
To solve this problem, enable local ND proxy on GigabitEthernet 3/0/2 of Switch A so that Switch
A can forward messages between Host A and Host B.
Local ND proxy implements Layer 3 communication for two hosts in the following cases:
{
The two hosts must connect to different isolated Layer 2 ports of a VLAN.
{
If a super VLAN is used, the two hosts must belong to different sub VLANs.
Configuration procedure
You can enable common ND proxy and local ND proxy in VLAN interface view, Layer 3 Ethernet
interface view, or Layer 3 Ethernet subinterface view.
To enable common ND proxy:
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 ND proxy. proxy-nd enable Disabled by default.
To enable local ND proxy:
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 ND proxy. local-proxy-nd enable Disabled by default.