Cisco AP775A - Nexus Converged Network Switch 5010 User Manual

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54-5
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-17256-03, Cisco MDS NX-OS Release 4.x
Chapter 54 Configuring IPv6 for Gigabit Ethernet Interfaces
About IPv6
IPv6 Address Type: Multicast
An IPv6 multicast address is an IPv6 address that has a prefix of FF00::/8 (1111 1111). An IPv6
multicast address is an identifier for a set of interfaces that typically belong to different nodes. A packet
sent to a multicast address is delivered to all interfaces identified by the multicast address. The second
octet following the prefix defines the lifetime and scope of the multicast address. A permanent multicast
address has a lifetime parameter equal to 0; a temporary multicast address has a lifetime parameter equal
to
1. A multicast address has the scope of a node, link, site, or organization, or a global scope has a scope
parameter of 1, 2, 5, 8, or E, respectively. For example, a multicast address with the prefix FF02::/16 is
a permanent multicast address with a link scope.
Figure 54-4 shows the format of the IPv6 multicast
address.
Figure 54-4 IPv6 Multicast Address Format
IPv6 hosts are required to join (receive packets destined for) the following multicast groups:
• All-node multicast group FF02::1.
• Solicited-node multicast group FF02:0:0:0:0:1:FF00:0000/104 concatenated with the low-order 24
bit of the unicast address.
The solicited-node multicast address is a multicast group that corresponds to an IPv6 unicast
address. IPv6 nodes must join the associated solicited-node multicast group for every unicast
address to which it is assigned. The IPv6 solicited-node multicast address has the prefix
FF02:0:0:0:0:1:FF00:0000/104 concatenated with the 24 low-order bits of a corresponding IPv6
unicast address. (See
Figure 54-5.) For example, the solicited-node multicast address corresponding
to the IPv6 address 2037::01:800:200E:8C6C is FF02::1:FF0E:8C6C. Solicited-node addresses are
used in neighbor solicitation messages.
52671
128 bits
4 bits4 bits
0 if permanent
1 if temporary
Interface ID0
1111 1111
8 bits 8 bits
F
F Lifetime Scope
Lifetime =
1 = node
2 = link
5 = site
8 = organization
E = global
Scope =

Cisco AP775A - Nexus Converged Network Switch 5010 Specifications

General

Brand	Cisco
Model	AP775A - Nexus Converged Network Switch 5010
Category	Switch
Language	English