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HP A5830 series Configuration Manual: Specifying The Type Of Mac Addresses Mapped To Virtual Ip Addresses

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Task
Enabling the trap function for VRRP
Specifying the type of MAC addresses mapped to virtual IP
addresses
After you specify the type of MAC addresses mapped to the virtual IP addresses of VRRP groups and
create a VRRP group, the master in the VRRP group uses the specified type of MAC address as the
source MAC address for sending packets and uses the specified type of MAC address to answer ARP
requests from hosts so that the hosts in the internal network can learn the mapping between the IP
address and the MAC address.
The following types of MAC addresses are available to be mapped to the virtual IP address of a VRRP
group:
Virtual MAC address—By default, a virtual MAC address is created automatically 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.
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 of an interface to forward the packets from a host to the IP address owner.
To specify the type of MAC addresses mapped to virtual IP addresses:
To do...
Enter system view
Specify the type of MAC
addresses mapped to virtual IP
addresses
Specify the type of the MAC addresses mapped to the virtual IP addresses before creating a VRRP
group. Otherwise, you cannot change the type of the MAC addresses mapped to virtual IP addresses.
If VRRP groups with the same ID are created on multiple interfaces of a device, and the VRRP
advertisements of these VRRP groups are to be sent through QinQ networks, HP recommends you to map
the real MAC addresses of the interfaces to the virtual IP addresses of these VRRP groups. Otherwise, the
VRRP advertisements of these VRRP groups cannot be sent successfully.
Creating a VRRP group and configuring virtual IP address
When creating a VRRP group on an interface, configure a virtual IP address for the VRRP group. If the
interface connects to multiple sub-networks, you can configure multiple virtual IP addresses for the VRRP
group to realize router backup on different sub-networks.
A VRRP group is created automatically when you specify the first virtual IP address for the VRRP group. If
you specify another virtual IP address for the VRRP group later, the virtual IP address is added to the
virtual IP address list of the VRRP group.
Use the command...
system-view
vrrp method { real-mac | virtual-
mac }
124
Remarks
Optional
Remarks
Optional
Virtual MAC address by default

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