R211x-HP Flexfabric 11900 Layer 3 - IP Services Command Reference

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{ The preferred lifetime configured for temporary IPv6 addresses minus DESYNC_FACTOR (a
random number in the range of 0 to 600 seconds).
• The valid lifetime of a temporary IPv6 address takes the smaller of the following values:
{ The valid lifetime of the address prefix.
{ The valid lifetime configured for temporary IPv6 addresses.
Examples
# Enable the system to generate a temporary IPv6 address.
<Sysname> system-view
[Sysname] ipv6 temporary-address
Related commands
• ipv6 address auto
• ipv6 nd ra prefix
• ipv6 prefer temporary-address
ipv6 unreachables enable
Use ipv6 unreachables enable to enable sending ICMPv6 destination unreachable messages.
Use undo ipv6 unreachables to disable sending ICMPv6 destination unreachable messages.
Syntax
ipv6 unreachables enable
undo ipv6 unreachables enable
Default
Sending ICMPv6 destination unreachable messages is disabled.
Views
System view
Predefined user roles
network-admin
mdc-admin
Usage guidelines
If the device fails to forward a received IPv6 packet because of a destination unreachable error, it drops
the packet and sends a corresponding ICMPv6 Destination Unreachable error message to the source.
If the device is generating ICMPv6 destination unreachable messages incorrectly, disable sending
ICMPv6 destination unreachable messages to prevent attack risks.
Examples
# Enable sending ICMPv6 destination unreachable messages.
<Sysname> system-view
[Sysname] ipv6 unreachables enable