Hi all,
Hope you are all well.
I met a problem as title,
As i know this problem will happen in all versions of net-snmp.
if we have the following configuration, all interfaces will be monitored.
notificationEvent linkUpTrap linkUp ifIndex ifAdminStatus
ifOperStatusnotificationEvent linkDownTrap linkDown ifIndex ifAdminStatus
ifOperStatus
monitor -u cjslyxz -r 60 -e linkUpTrap "Generate linkUp" ifOperStatus !=
2monitor -u cjslyxz -r 60 -e linkDownTrap "Generate linkDown" ifOperStatus == 2
I think we should only care about the interfaces ，the IfAdminStatus of which is
down.But i can not configure the followingmonitor -u cjslyxz -r 60 -e
linkDownTrap "Generate linkDown" ifOperStatus == 2 AND ifAdminStauts==1(up)
OR if i only care about interface eth0monitor -u cjslyxz -r 60 -e linkDownTrap
"Generate linkDown" ifOperStatus.2 == 2 //index 1 is for lo
So i think i can't solve this problem only change the configuretion, Am i right?
After i read some code of net-snmp,i think there're several ways to fix
this.Way 1: need to add one flags IFOPERSTATUS_UNUSED.In function
netsnmp_access_interface_ioctl_flags_getif(ifentry->os_flags & IFF_UP) {
ifentry->admin_status = IFADMINSTATUS_UP; if(ifentry->os_flags &
IFF_RUNNING) ifentry->oper_status = IFOPERSTATUS_UP;
else ifentry->oper_status = IFOPERSTATUS_DOWN; //Here we can
change the status to any other flag, such as unused, } else {
ifentry->admin_status = IFADMINSTATUS_DOWN;
ifentry->oper_status = IFOPERSTATUS_DOWN; }Way 2:Change the condition of
trigger the trap, let it support "ifOperStatus == 2 AND ifAdminStauts==1" OR
"ifOperStatus.2 == 2 "
What's your opinion?
Best regards,Merlin ------------------------------------------------------------------------------
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