H3C Technologies H3C S3100 Series Switches - Manual (Page 921)

1-18
Configuring the Maximum Number of IPv6 ICMP Error Packets Sent within a
Specified Time
If too many IPv6 ICMP error packets are sent within a short time in a network, network congestion may
occur. To avoid network congestion, you can control the maximum number of IPv6 ICMP error packets
sent within a specified time. Currently, the token bucket algorithm is adopted.
You can set the capacity of a token bucket, namely, the number of tokens in the bucket. In addition, you
can set the update period of the token bucket, namely, the interval for updating the number of tokens in
the token bucket to the configured capacity. One token allows one IPv6 ICMP error packet to be sent.
Each time an IPv6 ICMP error packet is sent, the number of tokens in a token bucket decreases by 1. If
the number of the IPv6 ICMP error packets that are continuously sent out reaches the capacity of the
token bucket, the subsequent IPv6 ICMP error packets cannot be sent out until new tokens are put into
the token bucket based on the specified update frequency.
Table 1-13 Configure the maximum number of IPv6 ICMP error packets sent within a specified time
To do… Use the command… Remarks
Enter system view system-view —
Configure the maximum
number of IPv6 ICMP error
packets sent within a specified
time
ipv6 icmp-error { bucket
bucket-size | ratelimit
interval }*
Optional
By default, the capacity of a token bucket is
10 and the update period to 100
milliseconds. That is, at most 10 IPv6 ICMP
error packets can be sent within an update
period.
Configuring the Hop Limit of ICMPv6 Reply Packets
When sending an ICMPv6 reply packet, the device will fill a configurable value in the Hop Limit field in
the ICMPv6 reply packet header.
Table 1-14 Configure the hop limit of ICMPv6 reply packets
To do… Use the command… Remarks
Enter system view system-view —
Configure the hop limit of ICMPv6
reply packets
ipv6 nd hop-limit value
Optional
64 by default.
Configuring ND Snooping
Among the S3100 series Ethernet switches, only the S3100-EI series support ND Snooping.