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-STATECHANGF. Standby: 49:
Vlan149 state Standby -> Active
Jan 9 08:00:56.011: %STANDBY-6-STATECHANGF. Standby: 49:
Vlan149 state Active -> Speak
Jan 9 08:01:03.011: %STANDBY-6-STATECHANGF. Standby: 49:
Vlan149 state Speak -> Standby
Jan 9 08:01:29.427: %STANDBY-6-STATECHANGF. Standby: 49:
Vlan149 state Standby -> Active
Jan 9 08:01:36.808: %STANDBY-6-STATECHANGF. Standby: 49:
Vlan149 state Active -> Speak
Jan 9 08:01:43.808: %STANDBY-6-STATECHANGF. 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 exchanging three hello messages properly.
E.
HSRP is not exchanging three hello messages properly.
F.
GLBP is not exchanging three hello messages properly.
Explanation:
These error messages describe a situation in which a standby HSRP router did not receive
three successive HSRP hello packets from its HSRP peer. The output shows that the
standby router moves from the standby state to the active state. Shortly thereafter, the router
returns to the standby state. Unless this error message occurs during the initial installation,
an HSRP issue probably does not cause the error message. The error messages signify the
loss of HSRP hellos between the peers. When you troubleshoot this issue, you must verify
the communication between the HSRP peers. A random, momentary loss of data
communication between the peers is the most common problem that results in these
messages. HSRP state changes are often due to High CPU Utilization. If the error message
is due to high CPU utilization, put a sniffer on the network and the trace the system that
causes the high CPU utilization. There are several possible causes for the loss of HSRP
packets between the peers. The most common problems are physical layer problems,
excessive network traffic caused by spanning tree issues or excessive traffic caused by each
Vlan.
Reference:
http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094afd.sh
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