Operation Manual – IPv6
H3C S3610&S5510 Series Ethernet Switches
Chapter 1 IPv6 Basics Configuration
1-21
1.7 Configuring IPv6 FIB-Based Forwarding
With the caching function of IPv6 FIB enabled, the device searches the FIB cache
when forwarding packets, thus reducing the time in searching IP packets and improving
the forwarding efficiency.
In the load sharing mode of IPv6 FIB, the device can decide how to select an equal cost
multi-path (ECMP) route to forward packets. Currently, two load sharing modes are
supported:
z
Load sharing based on the HASH algorithm: A certain algorithm based on the
source IPv6 address and destination IPv6 address is adopted to select an ECMP
route to forward packets.
z
Load sharing based on polling: Each ECMP route is used in turn to forward
packets.
Follow these steps to configure the IPv6 FIB-based forwarding:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enable the IPv6 FIB caching
function
ipv6 fibcache
Required
Disabled by default
Configure the
load sharing
based on the
HASH algorithm
ipv6
fib-loadbalance-type
hash-based
Configure
the IPv6
FIB load
sharing
mode
Configure the
load sharing
based on polling
undo ipv6
fib-loadbalance-type
hash-based
Optional
By default, the load
sharing based on
polling is adopted, that
is, each equivalent
route is used in turn to
forward packets.
1.8 Configuring ICMPv6 Packet Sending
1.8.1 Configuring the Maximum ICMPv6 Error Packets Sent in an Interval
If too many ICMPv6 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 ICMPv6 error packets sent within a specified time, currently by adopting the
token bucket algorithm.
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 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