Configuring Ipv6 Icmp Rate Limiting - Cisco Catalyst 2975 Software Configuration Manual

Chapter 35 Configuring IPv6 Host Functions
Switch# show ipv6 interface gigabitethernet1/0/1
GigabitEthernet1/0/1 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::20B:46FF:FE2F:D940
Global unicast address(es):
2001:0DB8:c18:1:20B:46FF:FE2F:D940, subnet is 2001:0DB8:c18:1::/64 [EUI]
Joined group address(es):
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds
ND advertised reachable time is 0 milliseconds
ND advertised retransmit interval is 0 milliseconds
ND router advertisements are sent every 200 seconds
ND router advertisements live for 1800 seconds
Hosts use stateless autoconfig for addresses.
Switch(config-if)# ipv6 nd router-preference high
Switch(config-if)# end
For more information about configuring DRP for IPv6, see the "Implementing IPv6 Addresses and Basic
Connectivity" chapter in the Cisco IOS IPv6 Configuration Library on Cisco.com.

Configuring IPv6 ICMP Rate Limiting

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.
Beginning in privileged EXEC mode, follow these steps to change the ICMP rate-limiting parameters:
Command
Step 1
configure terminal
Step 2
ipv6 icmp error-interval interval [bucketsize]
Step 3 end
Step 4
show ipv6 interface [interface-id]
Step 5 copy running-config startup-config
To return to the default configuration, use the no ipv6 icmp error-interval global configuration
command.
This example shows how to configure an IPv6 ICMP error message interval of 50 milliseconds and a
bucket size of 20 tokens.
Switch(config)#ipv6 icmp error-interval 50 20
OL-19720-02
FF02::1
FF02::2
FF02::1:FF2F:D940
Purpose
Enter global configuration mode.
Configure the interval and bucket size for IPv6 ICMP error
messages:
interval—The interval (in milliseconds) between tokens
•
being added to the bucket. The range is from 0 to
2147483647 milliseconds.
bucketsize—(Optional) The maximum number of tokens
•
stored in the bucket. The range is from 1 to 200.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Catalyst 2975 Switch Software Configuration Guide
Configuring IPv6
35-9