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Virtual Router
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The index number of the VRRP virtual router: 1 to 256.
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VRID
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Defines the virtual router ID. This is used in conjunction with the IP Address (below) to define a virtual router on this WSM.
To create a pool of VRRP-enabled routing devices which can provide redundancy to each other, each participating VRRP device must be configured with the same virtual router: one that shares the same VRID and IP Address combination.
The VRID for standard virtual routers (where the virtual router IP address is not the same as any virtual server) can be any integer between 1 and 255. The default value is 1. All VRID values must be unique within the VLAN to which the virtual router's IP interface belongs.
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IP Address
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Defines the IP address for this virtual router using dotted decimal notation. IP Address is used in conjunction with the VRID (above) to configure the same virtual router on each participating VRRP device. The default address is 0.0.0.0.
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IP Interface
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Selects a WSM IP interface (between 1 and 256). If the IP interface has the same IP address as the IP Address option above, this WSM is considered the "owner" of the defined virtual router. An owner has a special priority of 255 (highest) and will always assume the role of master router, even if it must preempt another virtual router which has assumed master routing authority. This preemption occurs even if the Preemption option below is disabled. The default value is 1.
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State
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Enables or disables the VRRP virtual router. The default is disabled.
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Priority
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Defines the election priority bias for this virtual router. This can be any integer between 1 and 254. The default value is 100. During the master router election process, the routing device with the highest virtual router priority number wins. If there is a tie, the device with the highest IP interface address wins. If this virtual router's IP Address is the same as the one used by the IP interface, the priority for this virtual router will automatically be set to 255 (highest). When priority tracking is used (below), this base priority value can be modified according to a number of performance and operational criteria.
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Advertisement Interval
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Defines the time interval between VRRP master advertisements. This can be any integer between 1 and 255 seconds. The default value is 1.
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Preemption
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Enables or disables a higher priority Backup VRRP virtual router to preempt a low-priority Master. The default is enabled.
Enables or disables master preemption. When enabled, if this virtual router is in backup mode but has a higher priority than the current master, this virtual router will preempt the lower priority master and assume control. Note that even when Preemption is disabled, this virtual router will always preempt any other master if this WSM is the owner (the IP interface address and virtual router IP Address are the same). By default, this option is enabled.
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Load Sharing
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Enables or disables virtual router sharing.
When enabled, this WSM will process any traffic addressed to this virtual router, even when in backup mode. By default, this option is enabled.
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Track VRs
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Enables or disables tracking other virtual routers for priority adjustment. The default is disabled.
When enabled, the priority for this virtual router will be increased for each virtual router in master mode on this WSM. This is useful for making sure that traffic for any particular client/server pairing are handled by the same WSM, increasing routing and load balancing efficiency.
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Track IP Interfaces
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Enables or disables tracking the state of IP interfaces active on the WSM. The default is disabled.
When enabled, the priority for this virtual router will be increased for each other IP interface active on this WSM. An IP interface is considered active when there is at least one active port on the same VLAN. This helps elect the virtual routers with the most available routes as the master.
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Track VLAN Ports
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Enables or disables tracking the states of VLAN ports for priority adjustment. The default is disabled.
When enabled, the priority for this virtual router will be increased for each active port on the same VLAN. A port is considered "active" if it has a link and is forwarding traffic. This helps elect the virtual routers with the most available ports as the master.
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Track L4 Ports
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Enables or disables tracking the state of Layer 4 ports for priority adjustment. This is applied when the virtual server is configured as a VRRP virtual router. The default is disabled.
When enabled for virtual server routers, the priority for this virtual router will be increased for each physical WSM port which has active Layer 4 processing on this WSM. This helps elect the main Layer 4 switch as the master.
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Track Real Servers
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Enables or disables tracking the states of real servers for priority adjustment. This is applied when the virtual server is configured as a VRRP virtual router. The default is disabled.
When enabled for virtual server routers, the priority for this virtual router will be increased for each healthy real server behind the virtual server IP address of the same IP address as the virtual router on this WSM. This helps elect the switch with the largest server pool as the master, increasing Layer 4 efficiency.
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Track HSRP Advertisements
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Enables or disables tracking HSRP advertisements for priority adjustment. The default is disabled.
Hot Standby Router Protocol (HSRP) is used with some types of routers for establishing router failover. In networks where HSRP is used, enable this option to increase the priority of this virtual router for each Layer 4 client-only port that receives HSRP advertisements. Enabling HSRP helps elect the switch closest to the master HSRP router as the master, optimizing routing efficiency.
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Track HSRP by VLAN
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Enables or disables tracking VLANs for priority adjustment. The default is disabled.
Hot Standby Router on VLAN works in VLAN-tagged environments. If enabled, increments only that VRRP instance that is on the same VLAN as the tagged HSRP master flagged packet.
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