H3C S9500 Series Operation Manual page 8

Operation Manual – VRRP
H3C S9500 Series Routing Switches
II. IPv6-based VRRP packet format
0
Version
Auth Type
Figure 1-4 IPv6-based VRRP packet format
As shown in
Version: Version number of the protocol, 3 for VRRPv3.
Type: Type of the VRRP packet. Only one VRRP packet type is present, that is,
VRRP advertisement, which is represented by 1.
Virtual Rtr ID (VRID): Serial number of the virtual router, that is, serial number of
the VRRP group. It ranges from 1 to 255.
Priority: Priority of the router in the VRRP group, in the range 0 to 255. A greater
value represents a higher priority.
Count IPv6 Addrs: Number of virtual IPv6 addresses for the VRRP group. A VRRP
group can have multiple virtual IPv6 addresses.
Auth Type: Authentication type. 0 means no authentication, 1 means simple
authentication. VRRPv3 does not support MD5 authentication.
Adver Int: Interval for sending advertisement packets, in centiseconds. The default
is 100.
Checksum: 16-bit checksum for validating the data in VRRPv3 packets.
IPv6 Address: Virtual IPv6 address entry of the VRRP group. The allowed number
is given by the Count IPv6 Addrs field.
Authentication Data: Authentication key. Currently, this field is used only for simple
authentication and is 0 for any other authentication modes.
3 7
Type Virtual Rtr ID
Adver Int
Figure 1-4, an IPv6-based VRRP packet consists of the following fields:
15
Priority
IPv6 address 1
IPv6 address n
Authentication data 1
Authentication data 2
1-7
Chapter 1 VRRP Configuration
23
Count IPv6 Addrs
Checksum
31