Cisco Catalyst 4500 Series, Software Configuration Manual

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63-2
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 63 Support for IPv6
About IPv6
For information about how Cisco Systems implements IPv6, go to this URL:
http://www.cisco.com/en/US/products/ps6553/products_ios_technology_home.html
This section describes the features that are supported for IPv6:
• IPv6 Addressing and Basic Connectivity, page 63-2
•
DHCP, page 63-3
• Security, page 63-3
•
First-Hop Security, page 63-4
• QoS, page 63-4
•
Management, page 63-4
• Multicast, page 63-5
•
Static Routes, page 63-5
• First-Hop Redundancy Protocols, page 63-6
•
Unicast Routing, page 63-6
• Tunneling, page 63-7
IPv6 Addressing and Basic Connectivity
The switch supports only IPv6 unicast addresses. It does not support site-local unicast addresses or
multicast addresses.
The IPv6 128-bit addresses are represented as a series of eight 16-bit hexadecimal fields separated by
colons in the format:
n:n:n:n:n:n:n:n . it is an example of an IPv6 address:
2031:0000:130F:0000:0000:09C0:080F:130B
The leading zeros in each field are optional, implementation is easier without them. it is the same address
without leading zeros:
2031:0:130F:0:0:9C0:80F:130B
You can also use two colons (::) to represent successive hexadecimal fields of zeros, but you can use this
short version only once in each address:
2031:0:130F::09C0:080F:130B
The switch supports the following features:
•
IPv6 address types: Anycast
• IPv6 default router preferences
•
IPv6 MTU path discovery
• Neighbor discovery duplicate address detection
•
Cisco Discovery Protocol — IPv6 address family support for neighbor information
• ICMPv6 redirect
•
ICMP rate limiting
• DNS lookups over an IPv6 transport
•
uRPF
• ICMPv6