Configuring IPv6 DNS 515
configured capacity. One token allows one ICMPv6 error packet to be sent. Each
time an ICMPv6 error packet is sent, the number of tokens in a token bucket
decreases by 1. If the number of ICMPv6 error packets successively sent exceeds
the capacity of the token bucket, subsequent ICMPv6 error packets cannot be sent
out until the number of tokens in the token bucket is updated and new tokens are
added to the bucket.
Follow these steps to configure the capacity and update period of the token
bucket:
Enable Sending of
Multicast Echo Replies
If hosts are capable of relying multicast echo requests, Host A can attack Host B by
sending an echo request with the source being Host B to a multicast address, then
all the hosts in the multicast group will send echo replies to Host B. Therefore, a
device is disabled from replying multicast echo requests by default.
Follow these steps to enable sending of multicast echo replies:
Configuring IPv6 DNS
Configuring Static IPv6
Domain Name
Resolution
Configuring static IPv6 domain name resolution is to establish the mapping
between host name and IPv6 address. When applying such applications as Telnet,
you can directly use a host name and the system will resolve the host name into an
IPv6 address. Each host name can correspond to only one IPv6 address.
Follow these steps to configure static IPv6 domain name resolution:
To do… Use the command… Remarks
Enter system view system-view -
Configure the capacity
and update period of
the token bucket
ipv6 icmp-error { bucket
bucket-size | ratelimit
interval } *
Optional
By default, the capacity of a token
bucket is 10 and the update period is
100 milliseconds. That is, at most 10
IPv6 ICMP error packets can be sent
within these 100 milliseconds.
The update period “0” indicates that
the number of ICMPv6 error packets
sent is not restricted.
To do… Use the command… Remarks
Enter system view system-view -
Enable sending of multicast
echo replies
ipv6 icmpv6 multicast-echo-reply
enable
Not enabled by
default.
To do… Use the command… Remarks
Enter system view system-view -
Configure a host name and the
corresponding IPv6 address
ipv6 host hostname
ipv6-address
Required
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