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VegaStream Strange SNMP counter reset
Interesting wire-speeds

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VegaStream Strange SNMP counter reset

Posted on 2008-02-28 15:00:00, modified on 2008-02-28 15:15:00
Tags: VegaStream, SNMP, Numbers

VegaStream has some very nice ATAs and T38 devices (still), but after the upgrade to VEGA400_R082S017 (8.2.17) every two and a half day their system.sysUptime counter gets resetted:

> Host  : sjh-vega400
> Output: Uptime is less than an hour! (328.61 seconds)
> Date  : 2008-02-28 14:21:08

According to Nagios, this happens every two and a half days:

The device doesn't reboot, the sysUpTime count just goes back to zero. Device itself says it's up for 9 days.

About 2 days, 11 hours, 37 minutes, 62 seconds.
214682 seconds...
0x3469a...

No idea which magic number is involved here.

Update
Thanks to callum on irc.oz.org/#bugs : 2 ^ 31 / 10,000, or an overflow of the signed counter of the number of 100 microseconds.


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Interesting wire-speeds

Posted on 2008-02-18 16:00:00
Tags: VegaStream, Networking, SNMP

VegaStream has some very nice ATAs and T38 devices, but on the network-side things are sometimes confusing for them:
[~/snmp] root@lizard>snmpwalk -v 1 -c public test-vega
RFC1213-MIB::sysDescr.0 = STRING: "Vegastream IP Telephony Gateway (VEGA-6x4)"
RFC1213-MIB::sysObjectID.0 = OID: RFC1155-SMI::enterprises.4686.11
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (305772277) 35 days, 9:22:02.77
RFC1213-MIB::ifNumber.0 = INTEGER: 2
RFC1213-MIB::ifIndex.1 = INTEGER: 1
RFC1213-MIB::ifIndex.2 = INTEGER: 2
RFC1213-MIB::ifDescr.1 = STRING: "VS LAN Port 1"
RFC1213-MIB::ifDescr.2 = STRING: "VS LAN Port 2"
RFC1213-MIB::ifType.1 = INTEGER: ethernet-csmacd(6)
RFC1213-MIB::ifType.2 = INTEGER: ethernet-csmacd(6)
RFC1213-MIB::ifMtu.1 = INTEGER: 1514
RFC1213-MIB::ifMtu.2 = INTEGER: 1514
RFC1213-MIB::ifSpeed.1 = Gauge32: 104857600
RFC1213-MIB::ifSpeed.2 = Gauge32: 10485760

104857600 is 100 * 1024 * 1024, or their idea of an 100 Mbps ethernet.


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