A10E/A28E/A28F Configuration Guide
Checking results
Check whether there is event group information on the device by the command of show rmon
alarms.
Alpha-A28E#show rmon alarms
Alarm 10 is active, owned by system
Monitors 1.3.6.1.2.1.2.2.1.20.1 every 20 seconds
Taking delta samples, last value was 0
Rising threshold is 15, assigned to event 1
Falling threshold is 0, assigned to event 0
On startup enable rising and falling alarm
Check whether there is alarm group information on the device by the command of show
rmon events.
Alpha-A28E#show rmon events
Event 1 is active, owned by system
Description is: High-ifOuterErrors.
Event generated at 0:0:0
Send TRAP when event is fired.
When an alarm event is triggered, you can view related records at the alarm management
dialog box of the NView NNM system.
9.4 LLDP
9.4.1 Introduction
With the enlargement of network scale and increase of network devices, the network topology
becomes more and more complex and network management becomes very important. A lot of
network management software adopts "auto-detection" function to trace changes of network
topology, but most of the software can only analyze to the 3
rd
layer and cannot make sure the
interfaces connect to other devices.
Link Layer Discovery Protocol (LLDP) is based on IEEE 802.1ab standard. Network
management system can fast grip the Layer 2 network topology and changes.
LLDP organizes the local device information in different Type Length Value (TLV) and
encapsulates in Link Layer Discovery Protocol Data Unit (LLDPDU) to transmit to straight-
connected neighbour. It also saves the information from neighbour as standard Management
Information Base (MIB) for network management system querying and judging link
communication.
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