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  1. XenServer Org
  2. XSO-833

SNMPD reports incorrect interface names after reboot until snmpd is restarted

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    Details

    • Type: Bug
    • Status: Done (View Workflow)
    • Priority: Minor
    • Resolution: Done
    • Affects Version/s: 7.2
    • Fix Version/s: 7.3
    • Component/s: Dom0
    • Labels:
      None
    • Environment:

      XenServer 7.2 on Dell M630 Blade servers; openvswitch

      Description

      After a reboot, the eth0 and eth1 interfaces on the dom0 host stop reporting as eth0 and eth1, and instead report as side-#eth0 and side#-eth1. Once SNMP is restarted, it returns the right names again.

       

      Before reboot:

      [nhanlon@<redacted> ~]$ snmpwalk -v2c -c <redacted> <redacted> .1.3.6.1.2.1.2.2.1.2
      IF-MIB::ifDescr.1 = STRING: lo
      IF-MIB::ifDescr.2 = STRING: eth0
      IF-MIB::ifDescr.3 = STRING: eth1
      IF-MIB::ifDescr.4 = STRING: ovs-system
      IF-MIB::ifDescr.5 = STRING: xapi1
      IF-MIB::ifDescr.6 = STRING: xapi2

       

      After reboot:

       

      [nhanlon@<redacted> ~]$ snmpwalk -v2c -c <redacted> <redacted> .1.3.6.1.2.1.2.2.1.2
      IF-MIB::ifDescr.1 = STRING: lo
      IF-MIB::ifDescr.2 = STRING: side-307-eth0
      IF-MIB::ifDescr.3 = STRING: side-7426-eth1
      IF-MIB::ifDescr.4 = STRING: ovs-system
      IF-MIB::ifDescr.10 = STRING: xapi1
      IF-MIB::ifDescr.11 = STRING: xapi2
      IF-MIB::ifDescr.12 = STRING: xapi3
      IF-MIB::ifDescr.19 = STRING: vif4.0
      IF-MIB::ifDescr.21 = STRING: vif5.0
      IF-MIB::ifDescr.22 = STRING: vif6.0
      IF-MIB::ifDescr.27 = STRING: vif8.0

       

      After `systemctl restart snmpd`, the snmpwalk returns the same as it did before reboot. It is extremely annoying to have to restart SNMP every time a machine is rebooted (usually due to XenServer crashing  )

       

      My suspicion is that SNMP is being started too soon after the network starts, and it hasn't finished doing whatever it does.

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            Assignee:
            Unassigned
            Reporter:
            nhanlon Neil Hanlon
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              Updated:
              Resolved: