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Configuring the Switch
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3
Web – Click IP, VRRP, Group Statistics. Select the VLAN and virtual router group.
Figure 3-111 VRRP Group Statistics
CLI
– This example displays VRRP protocol statistics for group 1, VLAN 1.
Hot Standby Router Protocol
Hot Standby Router Protocol (HSRP) allows you to configure a group of routers as a
single virtual router. The virtual router group is configured with a single virtual IP
address that can be used as the default gateway for host devices on the attached
network.
Configuring HSRP Groups
To configure HSRP, assign the same virtual router address to each router in the
group. Set the highest virtual router priority on the router that will serve as the
master. Enable the preempt feature to allow a router to take over as the master
when it comes on line (if it has a higher priority). To configure the backup routers
with an order of precedence for assuming the role of master, set the appropriate
priority on each of these routers.Then configure an authentication string to ensure
that HSRP messages are only be exchanged between authorized routers. You can
also dynamically adjust the virtual router priority by tracking the availability of any IP
interfaces on the router.
Console#show vrrp 1 interface vlan 1 counters 4-319
Total Number of Times Transitioned to MASTER : 6
Total Number of Received Advertisements Packets : 0
Total Number of Received Error Advertisement Interval Packets : 0
Total Number of Received Authentication Failures Packets : 0
Total Number of Received Error IP TTL VRRP Packets : 0
Total Number of Received Priority 0 VRRP Packets : 0
Total Number of Sent Priority 0 VRRP Packets : 5
Total Number of Received Invalid Type VRRP Packets : 0
Total Number of Received Error Address List VRRP Packets : 0
Total Number of Received Invalid Authentication Type VRRP Packets : 0
Total Number of Received Mismatch Authentication Type VRRP Packets : 0
Total Number of Received Error Packet Length VRRP Packets : 0
Console#