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Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
OL-8915-03
Chapter 35 Configuring IPv6 Host Functions
Configuring IPv6
To remove an IPv6 address from an interface, use the
no
ipv6 address
ipv6-prefix/prefix
length
eui-64
or
no ipv6 address
ipv6-address
link-local
interface configuration command. To remove all manually
configured IPv6 addresses from an interface, use the
no ipv6 address
interface configuration command
without arguments. To disable IPv6 processing on an interface that has not been explicitly configured
with an IPv6 address, use the
no ipv6 enable
interface configuration command. This example shows how
to enable IPv6 host on an interface:
Switch #
config t
Switch(config)#
interface gigabitethernet0/11
Switch(config-if)#
no switchport
Switch(config-if)#
ipv6 enable
Switch(config-if)#
exit
Configuring IPv6 ICMP Rate Limiting
IPv6 ICMP rate limiting uses a token-bucket algorithm for limiting the rate at which IPv6 ICMP error
messages are sent to the network. The interval between error messages is specified in a time interval and
a bucket size. Because some applications, such as traceroute, sometimes require replies to a group of
requests to be sent out in rapid succession, specifying only the interval between error messages can cause
the application to fail. The token bucket allows a number of tokens, each representing the ability to send
one error message, to be stored in virtual buckets. For every message to be sent, one token is removed
from the bucket. If a series of error messages is generated, error messages can be sent until the bucket is
empty. When the bucket is empty, IPv6 ICMP error messages are not sent until a new token is placed in
the bucket. This method does not increase the average rate-limiting time interval, but it provides more
flexibility than fixed-time intervals.
ICMP rate limiting is enabled by default with a default interval between error messages of 100
milliseconds and a bucket size (maximum number of tokens to be stored in a bucket) of 10.
Step 7
no switchport
Remove the interface from Layer 2 configuration mode (if it is a
physical interface).
Step 8
ipv6 address
ipv6-prefix/prefix
length
eui-64
or
ipv6 address
ipv6-address
link-local
or
ipv6 enable
Specify a global IPv6 address with an extended universal
identifier (EUI) in the low-order 64 bits of the IPv6 address.
Specify only the network prefix; the last 64 bits are
automatically computed from the switch MAC address. This
enables IPv6 processing on the interface.
Specify a link-local address on the interface to be used instead
of the link-local address that is automatically configured when
IPv6 is enabled on the interface. This command enables IPv6
processing on the interface.
Automatically configure an IPv6 link-local address on the
interface, and enable the interface for IPv6 processing. The
link-local address can only be used to communicate with nodes
on the same link.
Step 9
exit
Return to global configuration mode.
Step 10
end
Return to privileged EXEC mode.
Step 11
show ip v6 interface
interface-id
Verify your entries.
Step 12
copy running-config startup-config
(Optional) Save your entries in the configuration file.
Command
Purpose
