R21xx-HP FlexFabric 11900 Layer 3 IP Services Command Reference

193
Views
System view
Predefined user roles
network-admin
Usage guidelines
If a host is configured to reply to multicast echo requests, an attacker can use this mechanism to attack
the host. For example, if Host A (an attacker) sends an echo request to a multicast address with Host B as
the source, all hosts in the multicast group send echo replies to Host B.
To prevent attacks, do not enable the device to reply to multicast echo requests unless necessary.
Examples
# Enable replying to multicast echo requests.
<Sysname> system-view
[Sysname] ipv6 icmpv6 multicast-echo-reply enable
ipv6 nd autoconfig managed-address-flag
Use ipv6 nd autoconfig managed-address-flag to set the managed address configuration (M) flag to 1
so that the host can obtain an IPv6 address through stateful autoconfiguration (for example, from a
DHCPv6 server).
Use undo ipv6 nd autoconfig managed-address-flag to restore the default.
Syntax
ipv6 nd autoconfig managed-address-flag
undo ipv6 nd autoconfig managed-address-flag
Default
The M flag is set to 0 so that the host can obtain an IPv6 address through stateless autoconfiguration.
Views
Interface view
Predefined user roles
network-admin
Usage guidelines
The M flag determines whether a host uses stateful autoconfiguration to obtain an IPv6 address.
If the M flag is set to 1, the host uses stateful autoconfiguration (for example, from an DHCPv6 server to
obtain an IPv6 address. Otherwise, the host uses stateless autoconfiguration to generate an IPv6 address
according to its link-layer address and the prefix information in the RA message.
Examples
# Configure the host to obtain an IPv6 address through stateful autoconfiguration.
<Sysname> system-view