В Вс., 22/04/2012 в 23:49 -0300, Usuário do Sistema пишет: > Hello, I have a CentOS 5.4 Linux machine and I'm monitoring by snmp it > interfaces ethernet. but, when the machine is restart ID number snmp > that's interfaces are change. > > for exemplo when the linux machine is with ID 3 on interface eth1 and > it is reset so it come up with a different ID for exemplo 2 for eth1. > > so I wonder why happen ? it's normal ? it's possible set a ID value > for every interface ? Hello, This is perfectly normal, not only for Linux, but for every device, supporting SNMP. Interface id's are not persistent not only across reboots, but even between interface destruction/creation (i.e., ppp interfaces, when ppp reconnects, will have different ids even though their names are still ppp0). Id's are assigned sequentially by kernel during creation time, which in turn depends on the modules loading order and udev's actions. You can not manually assign interface id, as this could potentially lead to collisions and inconsistencies. > if is change the ID number for each interface so stop my monitoring > because my snmp software read by interface ID. That's bad for your software. It should identify interfaces by some other means, say, by ifAlias, and check ifAlias<->ID consistency either before each poll or periodically or by detecting events, that lead to ID change (reboots) > > thanks > -- > To unsubscribe from this list: send the line "unsubscribe netfilter" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
