Cisco PIX 525 Specifikace stáhnout pdf (Strana 562)

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Cisco Security Appliance Command Line Configuration Guide

OL-6721-01

Appendix D Addresses, Protocols, and Ports

IPv6 Addresses

The following restrictions apply to anycast addresses:

• An anycast address cannot be used as the source address for an IPv6 packet.

• An anycast address cannot be assigned to an IPv6 host; it can only be assigned to an IPv6 router.

Note Anycast addresses are not supported on the security appliance.

Required Addresses

IPv6 hosts must, at a minimum, be configured with the following addresses (either automatically or

manually):

• A link-local address for each interface.

• The loopback address.

• The All-Nodes multicast addresses

• A Solicited-Node multicast address for each unicast or anycast address.

IPv6 routers must, at a minimum, be configured with the following addresses (either automatically or

manually):

• The required host addresses.

• The Subnet-Router anycast addresses for all interfaces for which it is configured to act as a router.

• The All-Routers multicast addresses.

IPv6 Address Prefixes

An IPv6 address prefix, in the format ipv6-prefix/prefix-length, can be used to represent bit-wise

contiguous blocks of the entire address space. The IPv6-prefix must be in the form documented in RFC

2373 where the address is specified in hexadecimal using 16-bit values between colons. The prefix

length is a decimal value that indicates how many of the high-order contiguous bits of the address

comprise the prefix (the network portion of the address). For example, 2001:0DB8:8086:6502::/32 is a

valid IPv6 prefix.

The IPv6 prefix identifies the type of IPv6 address. Table D-3 shows the prefixes for each IPv6 address

type.

Table D-3 IPv6 Address Type Prefixes

Address Type Binary Prefix IPv6 Notation

Unspecified 000...0 (128 bits) ::/128

Loopback 000...1 (128 bits) ::1/128

Multicast 11111111 FF00::/8

Link-Local (unicast) 1111111010 FE80::/10

Site-Local (unicast) 1111111111 FEC0::/10

Global (unicast) All other addresses.

Anycast Taken from the unicast address space.

1 2 ... 557 558 559 560 561 562 563 564 565 566 567 ... 603 604

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