3Com Switch 4800G 24-Port Configuration Manual page 1082

1082 C 87: VRRP C
HAPTER
c
Creating Standby Group
and Configuring Virtual
IP Address
c
ONFIGURATION
IP address. In this case, you can associate the virtual IP address of the standby
group with the real MAC address, so that the packets from a host are forwarded
to the IP address owner according the real MAC address.
Follow these steps to configure the association between MAC address and virtual
IP address:
To do...
Enter system view
Configure the association
between virtual IP address and
MAC address
CAUTION: You should configure this function before creating a standby group.
Otherwise, you cannot modify the mapping between the virtual IP address and the
MAC address.
You need to configure a virtual IP address for a standby group when creating the
standby group. A VRRP standby group is created automatically when you specify
the first virtual IP address for the standby group. If you specify a virtual IP address
for the standby group later, the virtual IP address is only added to the virtual IP
address list of the VRRP standby group.
Configuration prerequisites
Before creating standby group and configuring virtual IP address, you should first
configure the IP address of the interface and ensure that the virtual IP address to
be configured is in the same network segment as the IP address of the interface.
Configuration procedure
Follow these steps to create standby group and configure virtual IP address:
To do...
Enter system view
Enter the specified interface
view
Create standby group and
configure virtual IP address of
the standby group
CAUTION:
The maximum number of standby groups on an interface and the maximum
■
number of virtual IP addresses in a standby group vary by device.
A standby group is removed after you remove all the virtual IP addresses in it. In
■
addition, configurations on that standby group no longer take effect.
The virtual IP address of the virtual router can be either an unused IP address
■
on the segment where the standby group resides or the IP address of an
interface on a switch in the standby group. In the latter case, the switch is
called the IP address owner.
Use the command...
system-view
vrrp method { real-mac |
virtual-mac }
Use the command...
system-view
interface interface-type
interface-number
vrrp vrid virtual-router-id
virtual-ip virtual-address
Remarks
-
Optional
The virtual MAC address is
associated with the virtual IP
address by default.
Remarks
-
-
Required
Standup group is not created
by default.