Configuring Ipv6 Ndp; Configuring A Static Neighbor Entry - 3Com MSR 50 Series Configuration Manual

666 C 46: IP 6 B
HAPTER V

Configuring IPv6 NDP

Configuring a Static
Neighbor Entry
C
ASICS ONFIGURATION
To do...
Configure an
IPv6 link-local
address
n
After an IPv6 site-local address or aggregatable global unicast address is
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configured for an interface, a link-local address will be generated automatically.
The automatically generated link-local address is the same as the one
generated by using the ipv6 address auto link-local command. If a link-local
address is manually assigned to an interface, this link-local address takes effect.
If the manually assigned link-local address is removed, the automatically
generated link-local address takes effect.
The manual assignment takes precedence over the automatic generation. That
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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 you delete the manually assigned address, the automatically
generated link-local address is validated.
The undo ipv6 address auto link-local command can be used only after the
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ipv6 address auto link-local command is executed. However, if an IPv6
site-local address or aggregatable 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
aggregatable global unicast address is configured, the interface has no
link-local address.
The manually configured global unicast address takes precedence over the one
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automatically generated. If a global unicast address has been generated on an
interface when you configure another one with the same address prefix, the
latter overwrites the previous one. After that, the overwritten global unicast
address will not be restored even if the manually configured one is removed. A
new global unicast address will be generated based on the address prefix
information in the RA message that the device receives for the next time.
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 IPv6 address
and the Layer 3 interface ID. Currently, there are two configuration methods:
Configure an IPv6 address and link-layer address for a Layer 3 interface.
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Use the command...
Automatically ipv6 address auto
generate a link-local
link-local address
Manually assign a ipv6 address
link-local address ipv6-address link-local
for an interface
Remarks
Optional
By default, after an IPv6
site-local address or
aggregatable global
unicast address is
configured for an
interface, a link-local
address will be generated
automatically.