3Com 4210 PWR Configuration Manual page 536

534 C 46: IP 6 M
HAPTER V
Configuring IPv6 NDP
C
ANGEMENT ONFIGURATION
manually assigned link-local address is deleted, the automatically generated
link-local address takes effect.
The manual assignment takes precedence over the automatic generation. That
■
is, if you first adopt the automatic generation and then the manual
assignment, the manually assigned link-local address will overwrite the
automatically generated one. If you first adopt the manual assignment and
then the automatic generation, the automatically generated link-local address
will not take effect and the link-local address of an interface is still the manually
assigned one. If the manually assigned link-local address is deleted, the
automatically generated link-local address takes effect.
You must have carried out the ipv6 address auto link-local command before
■
you carry out the undo ipv6 address auto link-local command. However, if
an IPv6 site-local address or global unicast address is already configured for an
interface, the interface still has a link-local address because the system
automatically generates one for the interface. If no IPv6 site-local address or
global unicast address is configured, the interface has no link-local address.
Configure a static neighbor entry
The IPv6 address of a neighbor node can be resolved into a link-layer address
dynamically through NS and NA messages or statically through manual
configuration.
You can configure a static neighbor entry in two ways:
Mapping a VLAN interface to an IPv6 address and a link-layer address
■
Mapping a port in a VLAN to an IPv6 address and a link-layer address
■
If you configure a static neighbor entry in the second way, make sure the
corresponding VLAN interface exists. In this case, the device associates the VLAN
interface to the IPv6 address to uniquely identify a static neighbor entry.
Table 388 Configure a static neighbor entry
To do...
Enter system view
Configure a static
neighbor entry
Configure the maximum number of neighbors dynamically learned
The device can dynamically acquire the link-layer address of a neighbor node
through NS and NA messages and add it to the neighbor table. Too large a
neighbor table may lead to the forwarding performance degradation of the
device. Therefore, you can restrict the size of the neighbor table by setting the
maximum number of neighbors that an interface can dynamically learn. When the
number of dynamically learned neighbors reaches the threshold, the interface will
stop learning neighbor information.
Table 389 Configure the maximum number of neighbors dynamically learned:
To do...
Enter system view
Use the command...
system-view
ipv6 neighbor ipv6-address mac-address { vlan-id
port-type port-number | interface interface-type
interface-number }
Use the command...
system-view
Remarks
-
Required
Remarks
-