BigIron RX Series Configuration Guide 1095
53-1002253-01
Configuring IPv6 ICMP
43
BigIron RX# show ipv6
Global Settings
unicast-routing enabled, hop-limit 64
No Inbound Access List Set
No Outbound Access List Set
Prefix-based IPv6 Load-sharing is Enabled, Number of load share paths: 4
Syntax: show ipv6
You can display the entries in the IPv6 forwarding cache; for example
:
Syntax: show ipv6 cache [<index-number> | <ipv6-prefix>/<prefix-length> | <ipv6-address> |
ethernet <port> | ve <number> | tunnel <number>]
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:
• ICMP rate limiting.
• ICMP redirects.
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:
• 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.
BigIron RX# show ipv6 cache
Total number of cache entries: 10
IPv6 Address Next Hop Port
1 5000:2::2 LOCAL tunnel 2
2 2000:4::106 LOCAL ethe 2
3 2000:4::110 DIRECT ethe 2
4 2002:c0a8:46a::1 LOCAL ethe 2
5 fe80::2e0:52ff:fe99:9737 LOCAL ethe 2
6 fe80::ffff:ffff:feff:ffff LOCAL loopback 2
7 fe80::c0a8:46a LOCAL tunnel 2
8 fe80::c0a8:46a LOCAL tunnel 6
9 2999::1 LOCAL loopback 2
10 fe80::2e0:52ff:fe99:9700 LOCAL ethe 1
To Next Page
Loading...
