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High Availability Configurations
Alteon Web switches offer flexibility in implementing redundant configurations. This section
discusses a few of the more useful and easily deployed configurations:
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"Active-Standby Virtual Server Router Configuration" on page 263
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"Active-Active VIR and VSR Configuration" on page 265
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"Active/Active Server Load Balancing Configuration" on page 267
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"VRRP-Based Hot-Standby Configuration" on page 275
Active-Standby Virtual Server Router Configuration
Figure 11-8
VRRP routers in an active-standby configuration, implementing a virtual server router. Active-
standby redundancy should be used in configurations that cannot support sharing, that is, con-
figurations where incoming packets will be seen by more than one switch, such as instances
where a hub is used to connect the switches. In this configuration, when both switches are
healthy, only the master responds to packets sent to the virtual server IP address.
Router
Internet
Router
Figure 11-8 Active-Standby High-Availability Configuration
Although this example shows only two switches, there is no limit on the number of switches
used in a redundant configuration. It is possible to implement an active-standby configuration
across all the VRRP-capable switches in a LAN.
Each VRRP-capable switch in an active-standby configuration is autonomous. Switches in a
virtual router need not be identically configured.
212777-A, February 2002
shows an example configuration where two Alteon Web switches are used as
Master-Active
VRID 2
VIP: 205.178.13.226
MAC address 00-00-5E-00-01-02
Web Switch 1
Web Switch 2
Backup-Standby
VRID 2
VIP: 205.178.13.226
MAC address 00-00-5E-00-01-02
Web OS 10.0 Application Guide
Server 1
RIP 1: 205.178.13.101
RIP 2: 205.178.13.105
Server 2
RIP 1: 205.178.13.102
RIP 2: 205.178.13.106
Server 3
RIP 1: 205.178.13.103
RIP 2: 205.178.13.107
Server 4
RIP 1: 205.178.13.104
RIP 2: 205.178.13.108
Chapter 11: High Availability
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