1-12
Configuring IPv6 NDP
Configuring 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 through a manually configured static neighbor entry.
The device uniquely identifies a static neighbor entry according to the neighbor IPv6 address and the
local Layer 3 interface ID. Currently, there are two configuration methods:
z Associate a neighbor IPv6 address and link-layer address with a Layer 3 interface.
z Associate a neighbor IPv6 address and link-layer address with a port in a VLAN.
Follow these steps to configure a static neighbor entry:
To do... Use the command... Remarks
Enter system view
system-view
—
Configure a static
neighbor entry
ipv6 neighbor ipv6-address mac-address { vlan-id
port-type port-number | interface interface-type
interface-number }
Required
You can adopt either of the two methods above to configure a static neighbor entry.
z After a static neighbor entry is configured by using the first method, the device needs to resolve the
corresponding Layer 2 port information of the VLAN interface.
z If you adopt the second method, you should ensure that the corresponding VLAN interface exists
and that the Layer 2 port specified by port-type port-number belongs to the VLAN specified by
vlan-id. After a static neighbor entry is configured, the device relates the VLAN interface to the IPv6
address to uniquely identify a static neighbor entry.
Configuring 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 into the neighbor table. Too large a neighbor table may reduce the forwarding
performance of the device. 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.
Follow these steps to configure the maximum number of neighbors dynamically learned:
To do… Use the command… Remarks
Enter system view
system-view
—
Enter interface view
interface interface-type
interface-number
—
Configure the maximum number of
neighbors dynamically learned by an
interface
ipv6 neighbors
max-learning-num number
Optional
The default value is 128.
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