3com S7906E Manuel De Montage

 

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Follow these steps to configure an IPv6 unicast address: 

Enter system view 

— 

Enter interface view 

interface interface-type 
interface-number 

— 

Manually assign an 
IPv6 address 

ipv6 address { ipv6-address 
prefix-length | 
ipv6-address/prefix-length } 

Adopt the EUI-64 
format to form an 
IPv6 address 

ipv6 address 
ipv6-address/prefix-length 
eui-64 

Configure an 
IPv6 
aggregatable 
global unicast 
address or 
site-local 
address 

Adopt stateless 
address 
autoconfiguration 

One of the three 
commands is required. 

By default, no site-local 
address or aggregatable 
global unicast address is 
configured for an interface.

Automatically 
generate a 
link-local address 
for the interface 

Configure an 
IPv6 link-local 
address 

Manually assign a 
link-local address 
for the interface 

ipv6 address ipv6-address 
link-local 

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. 

 

z 

An interface can have only one link-local address, but can have multiple global unicast addresses 

with different prefixes and site-local addresses.  

z 

After an IPv6 site-local address or aggregatable global unicast address is configured for an 

interface, a link-local address is 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 manual link-local address takes effect. 

If the manually assigned link-local address is removed, the automatically generated link-local 

address takes effect. 

z 

Manual assignment takes precedence over automatic generation. That is, if you first adopt 

automatic generation and then manual assignment, the manually assigned link-local address will 

overwrite the automatically generated one. If you first adopt manual assignment and then 

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. 

z 

The  undo ipv6 address auto link-local command can only remove the link-local addresses 

generated through the ipv6 address auto link-local command. 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.