Three Cisco Catalyst switches have been configured with a first-hop redundancy protocol. While reviewing some show commands, debug output, and the syslog, you discover the following information:
Jan 9 08:00:42.623: %STANDBY-6-STATECHANGE: Standby: 49:
Vlan149 state Standby -> Active
Jan 9 08:00:56.011: %STANDBY-6-STATECHANGE: Standby: 49:
Vlan149 state Active -> Speak
Jan 9 08:01:03.011: %STANDBY-6-STATECHANGE: Standby: 49:
Vlan149 state Speak -> Standby
Jan 9 08:01:29.427: %STANDBY-6-STATECHANGE: Standby: 49:
Vlan149 state Standby -> Active
Jan 9 08:01:36.808: %STANDBY-6-STATECHANGE: Standby: 49:
Vlan149 state Active -> Speak
Jan 9 08:01:43.808: %STANDBY-6-STATECHANGE: Standby: 49:
Vlan149 state Speak -> Standby
What conclusion can you infer from this information?
A.
VRRP is initializing and operating correctly.
B.
HSRP is initializing and operating correctly.
C.
GLBP is initializing and operating correctly.
D.
VRRP is not properly exchanging three hello messages.
E.
HSRP is not properly exchanging three hello messages.
F.
GLBP is not properly exchanging three hello messages.
Explanation:
Devices that are running HSRP send and receive multicast UDP based hello messages to detect router failure and to designate active and standby routers. Active, Standby, Speak, Listen and init or disabled etc are the states of HSRP.
Each HSRP router maintains three timers that are used for timing hello messages: an active timer, a standby timer, and a hello timer. When a timer expires, the router changes to a new HSRP state. The error shown in exhibit is due to some mismatch configuration so not properly exchanging the HSRP hello messages to select the active and standby router.