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Monitoring WAN bandwidth - port speed vs bandwidth

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  • astol
    Junior Member
    • Jul 2020
    • 9

    #1

    Monitoring WAN bandwidth - port speed vs bandwidth

    I want to monitor our WAN bandwidth %

    Our ASA is reporting the "cisco.asav.net.if.highspeed" is the value of the SFP/GBIC (1Gbps), whereas our WAN speed is 250Mbps.

    How do I correct this, so that the triggers respond appropriately? Or even adjust the triggers/items?
    Last edited by astol; 11-10-2021, 03:36. Reason: bandwidth
  • astol
    Junior Member
    • Jul 2020
    • 9

    #2
    my solution at this point is I cloned the trigger I wanted, which had a problem expression of

    Code:
    (avg(/router/net.if.in[ifInOctets.4],15m)>({$IF.UTIL.WARN:"GigabitEthernet0/0/3"}/100)*last(/router/net.if.speed[ifSpeed.4]) or
    avg(/router/net.if.out[ifOutOctets.4],15m)>({$IF.UTIL.WARN:"GigabitEthernet0/0/3"}/100)*last(/router/net.if.speed[ifSpeed.4])) and
    last(/router/net.if.speed[ifSpeed.4])>0
    to 2 new triggers, the warning has a problem expression of:

    Code:
    last(/router/cisco.asav.net.if.in.traffic[4])>=187500000 and last(/router/cisco.asav.net.if.in.traffic[4])<=220000000
    or last(/router/cisco.asav.net.if.out.traffic[4])>=187500000 and last(/router/cisco.asav.net.if.out.traffic[4])<=220000000
    and the high:

    Code:
    last(/router/cisco.asav.net.if.in.traffic[4])>220000000
    or last(/router/cisco.asav.net.if.out.traffic[4])>220000000

    so we have 2 new triggers that will report according to the internet link rather than the gbic port speed. the large numbers are the bps notation for the link speed. I was also able to use these triggers in my network map and have the link colour change depending on the trigger.

    Its more of a workaround than a solution, but works for now. I'd like to see an ability to set this somehow in the triggers as a feature

    Comment

    • johndoe2374
      Member
      • Aug 2021
      • 80

      #3
      There's no such thing as WAN speed on physical level, it's only your ISP's upstream limitation. So SNMP only returns physical adapter's speed (which is set manually or auto-negotiated). I've also wanted to get bandwidth utilization in % and I've had to create new items for "Interfaces SNMP" template, so it takes actual ISP limitation from interface comment, like "WAN - Speed: 200" by using regular expressions:

      Comment

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