12-25 
Use the undo ipv6 mtu command to restore the default MTU. 
By default, the MTU value is 1500 bytes. 
Examples 
# Set the MTU of IPv6 packets sent over VLAN-interface 100 to 1280 bytes. 
<Sysname> system-view 
[Sysname] interface vlan-interface 100 
[Sysname-Vlan-interface100] ipv6 mtu 1280 
ipv6 nd autoconfig managed-address-flag 
Syntax 
ipv6 nd autoconfig managed-address-flag 
undo ipv6 nd autoconfig managed-address-flag 
View 
Interface view 
Default Level 
2: System level 
Parameters 
None 
Description 
Use the ipv6 nd autoconfig managed-address-flag command to set the managed address 
configuration (M) flag to 1 so that the host can acquire an IPv6 address through stateful 
autoconfiguration (for example, DHCP server). 
Use the undo ipv6 nd autoconfig managed-address-flag command to restore the default. 
By default, the M flag is set to 0 so that the host can acquire an IPv6 address through stateless 
autoconfiguration. 
Examples 
# Configure the host to acquire an IPv6 address through stateful autoconfiguration. 
<Sysname> system-view 
[Sysname] interface vlan-interface 100 
[Sysname-Vlan-interface100] ipv6 nd autoconfig managed-address-flag 
ipv6 nd autoconfig other-flag 
Syntax 
ipv6 nd autoconfig other-flag 
undo ipv6 nd autoconfig other-flag 
View 
Interface view 
Default Level 
2: System level