Configuring WAN Monitor
Prerequisites
OpManager primarily relies on Cisco's IP-SLA
for monitoring the WAN and the prerequisite therefore is that the
device should be a Cisco router and must have IPSLA agent enabled on
it. Almost all the routers from Cisco were enabled with IPSLA agent and
we support from IOS version 12.3 or later. OpManager uses SNMP to query
the Cisco routers for the links' performance data. IPSLA familiarity is
not
a prerequisite. You just need to tell OpManager which links you want to
monitor. OpManager provides an intuitive configuration wizard to help
you configure all the IPSLA parameters for monitoring the WAN health.
Steps to set up the WAN Monitor
Using
OpManager, you can now monitor the availability and latency of a WAN
link / path. A WAN link mentioned here is the path between the router
in your main office and the one in the branch office that you wish to
monitor.
Step 1
: Add ( / discover) the router in your LAN to OpManager. And make sure
the snmp read and write community are configured properly, for
that
router.
Step 2: Configuring the Router
to send traps
Configure
the cisco router to send traps to OpManager. Alerts are shown based on
the traps received in OpManager. To configure OpManager server as the
SNMP Server receiving traps for the routers, telnet the router and type
the following command:
snmp-server host <opmanager server
IP> traps <host community
string> rtr
For instance, if the OpManager host IP Address is 192.168.18.128, and
the community string is private, the command would be:
snmp-server host 192.168.18.128 traps private rtr
Step 3: Creating the WAN Monitor
- Go to the Maps tab (on from the list of Infrastructure
views), click on-> WAN Monitors-> Settings
- Select
the source router from the list of routers discovered in OpManager and
then select the relevant interface of the source router
- Specify
the destination Ip Address either by using the 'Search' option to pick
from the discovered routers, or directly enter the IP Address and click
'Add' and submit the details.
- You
will see the summary of the monitor you are about to configure. Now
click 'Apply to device' to submit the details to the device. This will
take few seconds to configure.
Refresh the page after few seconds to see the new monitor. The data is
collected every hour, from the time you have configured.
[or]
You can also create the WAN monitor from the Router snapshot page. To
do so, go to Router snapshot page, click on Action tab and select Add
WAN Monitor. Enter the Monitor Name and Destination IP. Click Submit
to create the monitor or Click Advanced button to go to Create New WAN
Monitor page and follow the steps from b to d given
under Step 3.
To
edit any of the configuration details, go to the respective template,
make the changes and save the details. When you create a new monitor,
the updated values take effect. When the configuration is complete, the
router starts collecting the data at the specified frequency 60
seconds
( default value). OpManager updates this statistics (collected data)
every hour and the reports are generated after one hour of
configuration.
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