H3C Technologies H3C S5560 Series Switches - Manual (Page 171)

156
To solve this problem, enable local ND proxy on VLAN-interface 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 super VLAN is used, the two hosts must belong to different sub VLANs.
{
If Private VLAN is used, the two hosts must belong to different secondary VLANs.
Configuration procedure
You can enable common ND proxy and local ND proxy in VLAN interface view, Layer 3 Ethernet
interface 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
By default, common ND proxy is
disabled.
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
By default, local ND proxy is
disabled.
Configuring path MTU discovery
Configuring the interface MTU
IPv6 routers do not support packet fragmentation. If the size of a packet exceeds the MTU of the output
interface, the router discards the packet and sends a Packet Too Big message to the source host. The
source host fragments the packet according to the MTU. To avoid this situation, configure a proper
interface MTU.
To configure the interface MTU:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A