4000 Router Series Layer 3 - IP Services Command Reference

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• 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 packets.

Use undo ipv6 unreachables to disable sending ICMPv6 destination unreachable packets.

Syntax

ipv6 unreachables enable

undo ipv6 unreachables enable

Default

Sending ICMPv6 destination unreachable packets is disabled.

Views

System view

Predefined user roles

network-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 packets to prevent attack risks.

Examples

# Enable sending ICMPv6 destination unreachable packets.

<Sysname> system-view

[Sysname] ipv6 unreachables enable

reset ipv6 neighbors

Use reset ipv6 neighbors to clear IPv6 neighbor information.

Syntax

MSR2000/MSR3000: