H3c-technologies H3C S3100V2 Series Switches Manuel d'utilisateur télécharger pdf (Page 15)

Address Description

224.0.0.6 OSPF designated routers/backup designated routers

224.0.0.7 Shared Tree (ST) routers

224.0.0.8 ST hosts

224.0.0.9 Routing Information Protocol version 2 (RIPv2) routers

224.0.0.11 Mobile agents

224.0.0.12 Dynamic Host Configuration Protocol (DHCP) server/relay agent

224.0.0.13 All Protocol Independent Multicast (PIM) routers

224.0.0.14 Resource Reservation Protocol (RSVP) encapsulation

224.0.0.15 All Core-Based Tree (CBT) routers

224.0.0.16 Designated Subnetwork Bandwidth Management (SBM)

224.0.0.17 All SBMs

224.0.0.18 Virtual Router Redundancy Protocol (VRRP)

2. IPv6 multicast addresses

Figure 4 IPv6 multicast format

Group ID (112 bits)

0xFF Flags Scope

0 7 11 15 31

The following describes the meanings of the fields of an IPv6 multicast address:

• 0xFF—The most significant eight bits are 11111111, which indicates that this address is an IPv6

multicast address.

• Flags—The Flags field contains four bits.

Figure 5 Format of the Flags field

Table 4 Description on the bits of the Flags field

Bit Description

0 Reserved, set to 0

• When set to 0, it indicates that this address is an IPv6 multicast address without an

embedded RP address.

• When set to 1, it indicates that this address is an IPv6 multicast address with an embedded

RP address—the P and T bits must also be set to 1.

• When set to 0, it indicates that this address is an IPv6 multicast address not based on a

unicast prefix.

• When set to 1, it indicates that this address is an IPv6 multicast address based on a unicast

prefix—the T bit must also be set to 1.

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 110 111

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H3c-technologies H3C S3100V2 Series Switches Manuel d'utilisateur Page 15