Unresponsive Routers

Overview

• Similar to unresponsive devices, but the router that is responsible for a network doesn’t reply with I-Am router to network (with network specified).
• Does not take into account Global Who-Is Router to Network (there is no network specified, so can’t tell if one is missing).

Why it fails

• The network doesn’t exist.
• The router’s offline (power or network connection).
• The router’s busy (hammered with packets).
• The network number was changed (but the source doesn’t know that).

How to fix it

• Reset the source device.
• Get the network number, which you can cross-reference with your site map to figure out which router is responsible for that network.
• See if it’s online and stable.
• Check to see if the network number changed.
• Look at how much traffic is going through it (traffic where it’s the source and the destination).

Watch us troubleshoot unresponsive routers in these live webinars troubleshooting a corporate campus and a hospital site! Skip ahead to 5:20 on the corporate campus, and 8:22 on the hospital site.