Configuring Ipv6 Icmp; Configuring Icmp Rate Limiting - Dell PowerConnect B-RX Configuration Manual

Syntax: show ipv6
You can display the entries in the IPv6 forwarding cache; for example:
BigIron RX# show ipv6 cache
Total number of cache entries: 10
1
2
3
4
5
6
7
8
9
10
Syntax: show ipv6 cache [<index-number> | <ipv6-prefix>/<prefix-length> | <ipv6-address> |

Configuring IPv6 ICMP

As with the Internet Control Message Protocol (ICMP) for IPv4, ICMP for IPv6 provides error and
informational messages. Brocade's implementation of the stateless autoconfiguration, neighbor
discovery, and path MTU discovery features use ICMP messages.
This section explains how to configure the following IPv6 ICMP features:
•
•

Configuring ICMP rate limiting

You can limit the rate at which IPv6 ICMP error messages are sent out on a network. IPv6 ICMP
implements a token bucket algorithm.
To illustrate how this algorithm works, imagine a virtual bucket that contains a number of tokens.
Each token represents the ability to send one ICMP error message. Tokens are placed in the bucket
at a specified interval until the maximum number of tokens allowed in the bucket is reached. For
each error message that ICMP sends, a token is removed from the bucket. If ICMP generates a
series of error messages, messages can be sent until the bucket is empty. If the bucket is empty of
tokens, error messages cannot be sent until a new token is placed in the bucket.
You can adjust the following elements related to the token bucket algorithm:
•
•
For example, to adjust the interval to 1000 milliseconds and the number of tokens to 100 tokens,
enter the following command.
BigIron RX(config)# ipv6 icmp error-interval 1000 100
Syntax: ipv6 icmp error-interval <interval> [<number-of-tokens>]
BigIron RX Series Configuration Guide
53-1001810-01
IPv6 Address
5000:2::2
2000:4::106
2000:4::110
2002:c0a8:46a::1
fe80::2e0:52ff:fe99:9737
fe80::ffff:ffff:feff:ffff
fe80::c0a8:46a
fe80::c0a8:46a
2999::1
fe80::2e0:52ff:fe99:9700
ethernet <port> | ve <number> | tunnel <number>]
ICMP rate limiting.
ICMP redirects.
The interval at which tokens are added to the bucket. The default is 100 milliseconds.
The maximum number of tokens in the bucket. The default is 10 tokens.
Configuring IPv6 ICMP
Next Hop
LOCAL
LOCAL
DIRECT
LOCAL
LOCAL
LOCAL
LOCAL
LOCAL
LOCAL
LOCAL
43
Port
tunnel 2
ethe 2
ethe 2
ethe 2
ethe 2
loopback 2
tunnel 2
tunnel 6
loopback 2
ethe 1
1083