Troubleshooting Network Issues – Routing Path Search, Routing Events playback and Global search


Thank you for your interest in Packet
Design. In this video, we will show how the search and path playback feature in Route Explorer can help operations teams triage service reachability issues much
faster. Route Explorer is the core component in Packet Design’s Explorer
Network Service Assurance Suite. Service providers and large enterprises across
the world use the Explorer products to analyze IGP and BGP routing, Layer 3
and Layer 2 VPNs and traffic engineering tunnels in their IP/MPLS networks. When
managing and monitoring a large network it can be difficult to quickly find the
source of service delivery problems. It can be host of things including a failing
router, a misconfigured tunnel or even a VRF issue. When you are monitoring a
network like this and a service availability or performance issue is
reported from a location, isolating the problem can be fairly difficult. In this
case users in Seattle report that they have intermittent connectivity issues to
an application hosted at a data center in New York. At first this is surprising
because connectivity from Los Angeles, which supposedly using the same Seattle to
New York path, is having no issues. Without route analytics, troubleshooting
would involve first identifying the actual path taken by traffic from
Seattle to New York, and then getting to the root cause. Now if you have to do
this in a large network with thousands of devices and paths, this could take
hours. With Route Explorer, all we have to do is enter the source and
destination in the “Path Search” option here, or right click on the source device
and select start route and do the same thing on the destination device and
click on end route. This will show you the path taken by traffic between
Seattle and New York. The path search also allows you to add multiple source
and destination pairs in order to compare how each route behaves. Using this
we can also look at the Los Angeles to New York path. We can see that traffic
between both the locations took two different paths which partially explains
why Seattle alone had connectivity issues. To further analyze traffic from
Seattle to New York, we can use the DVR playback feature to go back in time, and
see how the route behaved. So from the drop-down select the time
period you want to go back in, select the granularity of the playback, and click on
“Play”. From watching the traffic we can see that this link here and this one
here has been having some connectivity issues, which actually explains the cause
for intermittent connectivity between Seattle and New York. Another feature is
the “Global Search” here in the top right corner. The “Global Search” enables you to
search for any element you’re monitoring with the Explorer Suite. It can be a
device, an interface, a tunnel or any VPN inventory. Say you’re a service
provider and have hundreds of VRFs for different customers. All you have to do
is, start typing in the name and you are presented with all the possible matches.
So this makes it easier for the network engineer to quickly find out what he
needs from his global network with thousands of devices and hundreds of
links and VRFs, all catering to different customers or enterprises. As
you can see, these powerful search features and the DVR playback that lets
you go back in time, can help you quickly find out what you need for faster
troubleshooting and analyzing your network issues. Thank you for watching
and do check out our other videos and resources on our website packetdesign.com to learn more about Packet Design Explorer suite.

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