Siemens SCALANCE XR-500 Instructions

6 Useful information
VRRP
Entry-ID: 109798556, V1.0, 09/2021
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2021 All rights reserved
6 Useful information
6.1 Normal operation
The master router is responsible for the routing and cyclically sends VRRP
advertisements to all its IP interfaces for which VRRP is enabled. In concrete
terms, this means that sends an advertisement cyclically in both subnets. The
backup router is not active here and listens to the VRRP advertisements of the
master. As long as these are received, the backup remains in its role. The master
router also responds to ARP requests.
Figure 6-1
Subnet A
Router 1
Master
PC 1 PC 2
Router 2
Backup
Subnet B
VRRP advertisements
6.2 Failure of a device or a connection
A distinction should be drawn between a device failing and a connection failing.
6.2.1 Router failure
If the VRRP advertisements do not come, the backup devices interpret this as a
failure of the master router or of the connection. The backup device now actively
takes over the routing in this subnet until the VRRP advertisements can be
received from the master router again.
Figure 6-2
Subnet A
Router 1
Master → Backup
PC 1 PC 2
Router 2
Backup→ Master
Subnet B
VRRP advertisements
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Siemens SCALANCE XR-500 Specifications

General

Brand	Siemens
Model	SCALANCE XR-500
Category	Switch
Language	English