Troubleshoot Network Problems with Routing Rules

1,388 views

Published on

Learn how to troubleshoot network problems with routing tools using SolarWinds® Network Performance Monitor (NPM).

Published in: Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,388
On SlideShare
0
From Embeds
0
Number of Embeds
131
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Troubleshoot Network Problems with Routing Rules

  1. 1. Troubleshoot Network Problems with Routing Tools © 2014 SolarWinds Worldwide, LLC. All rights reserved. 1
  2. 2. Agenda Learn how to troubleshoot network problems with routing tools using SolarWinds® Network Performance Monitor (NPM). • • • • • Overview of NPM and How It Helps Network Troubleshooting Resources How to Troubleshoot with NPM Routing Tools Troubleshooting Walk-Through – Important Tips! Monitoring Network Using SolarWinds NPM © 2014 SolarWinds Worldwide, LLC. All rights reserved. 2
  3. 3. Overview of NPM and How It Helps Network administrators should spend their time monitoring the network rather than supporting their network monitoring software What is NPM? SolarWinds NPM helps you quickly detect, diagnose, and resolve performance issues, including route and multicast issues, by delivering real-time views, reports, charts, and dashboards to easily manage enterprise networks. NPM helps you troubleshoot routing issues to get your network back on track and optimized for maximum performance. © 2014 SolarWinds Worldwide, LLC. All rights reserved. 3
  4. 4. Network Troubleshooting Resources in NPM © 2014 SolarWinds Worldwide, LLC. All rights reserved. 4
  5. 5. Network Troubleshooting Resources 5 Important Resources in NPM that Help Troubleshoot Routing Problems: 2 1. Routing Table 2. Top 10 Flapping Routes 4 3. Routing 3 Neighbors 4. Default Route 1 Changes 5. Routing Details 5 © 2014 SolarWinds Worldwide, LLC. All rights reserved. 5
  6. 6. Routing Table Each router has its own Routing Table and each Routing Table is potentially different for any given router in your network. As you can see, the Routing Table information is displayed across 6 columns: Destination Network, CIDR, Next Hop, Interface, Metric, and Source © 2014 SolarWinds Worldwide, LLC. All rights reserved. 6
  7. 7. Top 10 Flapping Routes The Top 10 Flapping Routes resource shares some columns in common with the Routing Table. Flaps – Shows you the number of Flaps that have occurred in the last selected time period. Protocol – Shows the routing protocol used. Last Change – This gives you an indication of when a change was made. © 2014 SolarWinds Worldwide, LLC. All rights reserved. 7
  8. 8. Routing Neighbors The Routing Neighbors resource shows you which routers are directly connected to the router you are currently viewing and provides status on this relationship. Node Name – This is a clickable link that will take you directly to the Node shown, giving you further information about a specific node. Status – Gives you information about a given router's status, helping with communication issues. © 2014 SolarWinds Worldwide, LLC. All rights reserved. 8
  9. 9. Default Route Changes & Routing Details Default Route Changes resource provides a quick view of any changes made to default routes and helps you narrow down when changes have occurred. Routing Details resource provides you a quick glance at when Protocols were last polled so you will know how fresh your routing data is. © 2014 SolarWinds Worldwide, LLC. All rights reserved. 9
  10. 10. Step-by-Step Troubleshooting with Routing Tools in NPM © 2014 SolarWinds Worldwide, LLC. All rights reserved. 10
  11. 11. Troubleshooting with Routing Tools In this module, we’ll explain troubleshooting with a scenario using the Interactive Online Demo to help illustrate how you can use these tools to troubleshoot real world issues in your own environment. Routing is one of the keys to a properly functioning network. IP packets on your network must be routed, not only to their given destinations, and should arrive in the fastest way possible. In 7-Steps, find the root cause of the routing issue and troubleshoot the network. © 2014 SolarWinds Worldwide, LLC. All rights reserved. 11
  12. 12. Step 1 – High Errors and Discards Take a look at the High Errors and Discards in NPM. » Notice the node labeled “Router5.lab.local” has a significant amount of discards. » Click on “Router5.lab.local” (hereafter referred to as “Router 5”) to drill down and see the Node Details Page for that router. © 2014 SolarWinds Worldwide, LLC. All rights reserved. 12
  13. 13. Step 2 – Network Sub View In Router5.lab.local, once on the Node Details page, click on the Network Tab. Network Sub View is where all of the Routing Resources are located. © 2014 SolarWinds Worldwide, LLC. All rights reserved. 13
  14. 14. Step 3 – Current Percent Utilization In Network Sub View, the “Current Percent Utilization” of “Router 5” has some issues transmitting packets. Check the "STATUS" column of the Current Percent Utilization of Each Interface resource (middle of the page) shows two “Down” interfaces. © 2014 SolarWinds Worldwide, LLC. All rights reserved. 14
  15. 15. Step 4 – Check Routing Table While comparing Step 3 & Step 4, we can see that the Down Interfaces do not actually appear in the routing table. If Routing Table shows all GREEN, the subnets are properly routed to the other interfaces on this device. (cont…) © 2014 SolarWinds Worldwide, LLC. All rights reserved. 15
  16. 16. Step 4 – Check Routing Table (cont.) NPM combines node information allowing visibility into the real availability of nodes and interfaces. Hovering over elements, such as interfaces, activates a pop up (image on the right) that provides more details and a performance overview. © 2014 SolarWinds Worldwide, LLC. All rights reserved. 16
  17. 17. Step 6 – Check Routing Neighbors In this instance we have Router 2 as one of our neighbors using the OSPF protocol. And the second neighbor 74.115.12.1 which is using the BGP Protocol. The second neighbor, running BGP, shows up as IP Address 74.115.12.1 and actually tells us that Orion is not monitoring this device as a node. If it were being monitored in NPM, we could drill down and view its Node Details Page as we can with Router2.lab.local. © 2014 SolarWinds Worldwide, LLC. All rights reserved. 17
  18. 18. Step 7– Check Flapping Routes By providing the number of “Flaps,” how many times the path was announced for this particular router, insight can be gained into serious issues that need attention right now or emerging issues which might become more serious down the road. Notice that for Destination Network 10.0.0.0 we can see 8 Flaps to Router2.lab.local. © 2014 SolarWinds Worldwide, LLC. All rights reserved. 18
  19. 19. Step 8 – Check Flapping Routes Finally, check the Default Route Change resource to learn if the default route has been added/removed/changed, and if so, when. Need More info? Click Here © 2014 SolarWinds Worldwide, LLC. All rights reserved. 19
  20. 20. Test Drive NPM! Learn more about SolarWinds Network Performance Monitor © 2014 SolarWinds Worldwide, LLC. All rights reserved. 20
  21. 21. Thank You! © 2014 SolarWinds Worldwide, LLC. All rights reserved. 21

×