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Cisco ASR Monitoring Question

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  • dratcliff
    Junior Member
    • Sep 2025
    • 3

    #1

    Cisco ASR Monitoring Question

    Hello,

    For background, we are a very small ISP using a Cisco ASR 1006 as a BRAS. I've inherited a Zabbix deployment that included bandwidth monitors set up for our business customers. These monitors had been set up by doing an SNMP walk via CLI to get their OID from the corresponding port channel number.

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    We recently learned that these interface values do not persist through reboots. The port channel number will remain the same, but the interface description number changes. Not that the ASR is rebooted often, but we had a situation that required us to do so, rendering all of our bandwidth monitors we had set up to now be incorrect.

    I am not very experienced with Zabbix and I was wondering if there is a better way to do this. We could just use discovery on the ASR, but way too many interfaces and other un-needed metrics get collected. We also like breaking down our customers to individual hosts within Zabbix and just have the SNMP IP point to the ASR for each of them. Is there any sort of way to have Zabbix essentially do an SNMP walk based on the port channel number to determine the OID? It wouldn't need to do an SNMP walk each time in collects data but say like once a day.

    Thoughts?

    Thank you in advanced.​
  • troffasky
    Senior Member
    • Jul 2008
    • 565

    #2
    A) I have not used Cisco in anger for 10y+ but ISTR 'snmp ifindex persist' command or similar to keep indices the same across reboots
    B) Zabbix can work around unstable interface indices anyway https://www.zabbix.com/documentation...p/dynamicindex . I am using this feature successfully for collecting Sonicwall IPsec tunnel stats with constantly changing ifIndices.

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