H3C Technologies H3C SecPath F1000-E - Manual (Page 13)

12
Task Remarks
Mapping a Virtual IP Address to a MAC Address
Optional
When VRRP works in load
balancing mode, the mapping
between a virtual IP address and
a MAC address can be
configured but is not effective.
Configuring VRRP Working Mode Optional
Specifying the VRRP Control VLAN Optional
Creating a VRRP Group and Configuring Virtual IP Address Required
Configuring Router Priority, Preemptive Mode and Tracking Function Optional
Configuring VF Tracking
Optional
The VF tracking function is
effective only when VRRP works
in load balancing mode.
Configuring VRRP Packet Attributes Optional
Enabling the Trap Function for VRRP Optional
Mapping a Virtual IP Address to a MAC Address
When the virtual IP address of a VRRP group is mapped to a MAC address, the master uses the
configured MAC address as the source MAC address for sending packets so that the hosts in the internal
network can learn the mapping between the IP address and the MAC address and thus forward the
packets destined to the other network segments to the master.
Two types of mappings between the virtual IP address and MAC address are available:
• Mapping the virtual IP address to a virtual MAC address
By default, a virtual MAC address is automatically created for a VRRP group when the VRRP group is
created, and the virtual IP address of the VRRP group is mapped to the virtual MAC address. When such
a mapping is adopted, the hosts in the internal network do not need to update the mapping between the
IP address and MAC address when the master changes.
• Mapping the virtual IP address to the real MAC address of an interface
In case that an IP address owner exists in a VRRP group, if the virtual IP address is mapped to the virtual
MAC address, two MAC addresses are mapped to one IP address. To avoid such as problem, map the
virtual IP address of the VRRP group to the real MAC address to forward the packets from a host to the
IP address owner.
Follow these steps to map a virtual IP address to a MAC address:
To do… Use the command… Remarks
Enter system view system-view —
Map a virtual IP address to a MAC
address vrrp method { real-mac |
virtual-mac }
Optional
By default, a virtual MAC address
is mapped to a virtual IP address.