Figure 11-7 Active-Active High Availability; Table 11-2 Sharing Active-Active Failover - Nortel Web OS Switch Software Application Manual

Web OS 10.0 Application Guide
Sharing/Active-Active Failover
Web OS supports sharing of interfaces at both Layer 3 and Layer 4, as shown in
With sharing, an IP interface or a VIP address can be active simultaneously on multiple
switches, enabling active-active operation as shown in

Figure 11-7 Active-Active High Availability

Table 11-2 Sharing Active-Active Failover

Web Switch 1 Master-Active VR 1
VRID 2
VIP: 205.178.13.226
MAC address 00-00-5E-OO-01-02
Web Switch 2 Backup-Active VR 1
VRID 2
VIP: 205.178.13.226
MAC address 00-00-5E-OO-01-02
When sharing is used, incoming packets are processed by the switch on which they enter the
virtual router. The ingress switch is determined by external factors, such as routing and Span-
ning Tree configuration.
N
OTE
entry point into the virtual router—for example, where a hub is used to connect the switches.
n
260 Chapter 11: High Availability
Router
Internet
Router
Backup-Active VR 2
VRID 4
VIP: 205.178.13.240
MAC address 00-00-5E-OO-01-04
Master-Active VR 2
VRID 4
VIP: 205.178.13.240
MAC address 00-00-5E-OO-01-04
–
Sharing cannot be used in configurations where incoming packets have more than one
Table
Master-Active VR 1
Backup-Active VR 2
Master-Active VR 3
Web Switch 1
Web Switch 2
Backup-Active VR 1
Master-Active VR 2
Backup-Active VR 3
Figure
11-2.
Master-Active VR 3
VRID 6
VIP: 205.178.13.110
MAC address 00-00-5E-OO-01-06
Backup-Active VR 3
VRID 6
VIP: 205.178.13.110
MAC address 00-00-5E-OO-01-06
212777-A, February 2002
11-7.