How much bandwidth for management over <10Mbit WAN?

FrankGuthrieFrankGuthrie Member Posts: 245
Is there a rule of thumb if you want to manage a router at a remote site with a bandwidth of 10Mb or less?

If you want to keep your remote management traffic from being drowned, you'd probably do some QoS/Shaping, but is there a rule that say that if you have 10 Mb, then 1Mb needs to be reserved for management, and what about smaller bandwith 2 Mb etc....?

What I mean with management is using the CLI/Console/VTY access for troubleshooting purposes, configuration and the occasional upgrade of the IOS.

Comments

  • DCDDCD Member Posts: 453 ■■■□□□□□□□
    You should only need about 64kbps.
  • FrankGuthrieFrankGuthrie Member Posts: 245
    Are then any rules or best practices about my question?
  • OctalDumpOctalDump Member Posts: 1,722
    Consider that the serial console is about 10kbps, you wouldn't need much at all. You could get away with a lot less. A typing speed of 30 words per minute works out at about 300bps. And a lot (like 99%+) is idle time. But you will probably want more than that if you need to upgrade the IOS (ie upload an image over that link).

    The point is, that unless you have more specific needs, or are aware of, for example, routing protocol traffic or similar things, it probably isn't worth worrying about.

    Top Down Network Design by Priscilla Oppenheimer gives a rule of thumb that management traffic (including routing protocols, polling, STP frames, CDP, SNMP, pings etc etc) should not exceed 5%. So that gives you a ceiling figure.
    2017 Goals - Something Cisco, Something Linux, Agile PM
  • FrankGuthrieFrankGuthrie Member Posts: 245
    OctalDump wrote: »
    Consider that the serial console is about 10kbps, you wouldn't need much at all. You could get away with a lot less. A typing speed of 30 words per minute works out at about 300bps. And a lot (like 99%+) is idle time. But you will probably want more than that if you need to upgrade the IOS (ie upload an image over that link).

    The point is, that unless you have more specific needs, or are aware of, for example, routing protocol traffic or similar things, it probably isn't worth worrying about.

    Top Down Network Design by Priscilla Oppenheimer gives a rule of thumb that management traffic (including routing protocols, polling, STP frames, CDP, SNMP, pings etc etc) should not exceed 5%. So that gives you a ceiling figure.

    Thanks Octaldump,that is something I can work with.
  • DCDDCD Member Posts: 453 ■■■□□□□□□□
    As OctalDump said SSH traffic is not going to take much bandwidth you want to prioritize it but not over VOIP traffic. You won't be load a IOS if traffic is congested. For standard routers you would have to restart the router.
  • FrankGuthrieFrankGuthrie Member Posts: 245
    DCD wrote: »
    As OctalDump said SSH traffic is not going to take much bandwidth you want to prioritize it but not over VOIP traffic. You won't be load a IOS if traffic is congested. For standard routers you would have to restart the router.

    Well it would be nice that if the offsite location is quite far, that you won;t have to wait for days before IOS has been copied to the device, if you want to do a upgrade.
Sign In or Register to comment.