Vrrp With Load Sharing - Hirschmann MACH 4000 User Manual

VRRP/HiVRRP

5.3 VRRP with load sharing

With the simple configuration, a router performs the gateway function for all
terminal devices. The capacity of the redundant router lies idle. VRRP allows
you to also use the capacity of the redundant router. By setting up a number
of virtual routers, you can enter different default gateways on the connected
terminal devices and thus steer the data flow.
When both routers are active, the data flows via the router on which the IP
address of the default gateway has the higher VRRP priority. If a router fails,
then all the data flows via the remaining routers.
10.0.1.13
Default Gateway
10.0.1.12
10.0.1.100
10.0.1.11
Default Gateway
10.0.1.10
10.0.1.200
Figure 20: Virtual router with load sharing
To use load sharing, you perform the following configuration steps:
Define a second VRID for the same router interface.
Assign the router interface its own IP address for the second VRID.
Assign the second virtual router a lower priority than the first virtual router.
When configuring the redundant router, make sure that you assign the
second virtual router a higher priority than the first.
Give the terminal devices one of the virtual router IP addresses as a de-
fault gateway.
Routing L3P
Release 4.0 11/07
5.3 VRRP with load sharing
IP=10.0.1.1:
VRID=1, VR-IP=10.0.1.100, Priority= 200
VRID=2, VR-IP=10.0.1.200, Priority=100
A
10.0.1.100
VR
10.0.1.200
B
IP=10.0.1.1:
VRID=1, VR-IP=10.0.1.100, Priority=100
VRID=2, VR-IP=10.0.1.200, Priority=200
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