Network Health Checklist

by David Sudjiman ~ February 16th, 2006. Filed under: Cisco.
  • No shared Ethernet segments are saturated (no more than 40 percent network utilization).
  • No shared Token Ring segments are saturated (no more than 70 percent network utilization).
  • No WAN links are saturated (no more than 70 percent network utilization).
  • The response time is generally less than 100 milliseconds.
  • No segments have more than 20 percent broadcast/multicast.
  • No segments have more than one cyclic redundancy check (CRC) error per million bytes of data.
  • On the Ethernet segments, less than 0.1 percent of the packets result in collisions.
  • On the Token Ring segments, less than 0.1 percent of the packets are soft errors that are unrelated to ring insertion.
  • On the Fiber Distributed Data Interface (FDDI) segments, there has been no more than one ring operation per hour that is not related to ring insertion.
  • The Cisco routers are not over-utilized (5-minute CPU utilization is no more than 75 percent).
  • The number of output queue drops has not exceeded 100 in an hour on any Cisco router.
  • The number of input queue drops has not exceeded 50 in an hour on any Cisco router.
  • The number of buffer misses has not exceeded 25 in an hour on any Cisco router.
  • The number of ignored packets has not exceeded 10 in an hour on any interface on a Cisco router.

Source: CCDA Self-Study: Designing for Cisco Internetwork Solutions (DESGN), ISBN:1-58705-141-9

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2 Responses to Network Health Checklist

  1. moshe
    March 15th, 2006 at 2:18 am

    thanks for the info :)

    this is just what i was looking for ….

    regards

    moshe

  2. Bielo Wilkes
    April 14th, 2007 at 11:50 pm

    Thanks, I needed this to add in my project paper for my degree.

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