Sergei Gavrikov wrote: > On Fri, May 08, 2009 at 10:38:24PM +0000, Grant Edwards wrote: >> On 2009-05-08, Sergei Gavrikov <[email protected]> wrote: >> >>> If your guess is right... >> It's not a guess. >> >> The problem occurs when cyg_snmp_get_if() is called with if_num <= 0. >> >> The loop takes 1-2 minutes to loop from -1, -2, back to 0, >> causing the SNMP management thread to lock out all lower >> priority threads while it's doing so. > > Then fix it. > >>> Can you walk here with/without tweaks when if_num=0 >>> >>> repo/devo/ecos/packages/net/snmp/agent/current/src/mibgroup/mibII/interfaces.c:398 > > [snip] > >> I'm surprised nobody else has run into this. I'm told all our >> customers who have HP or Cisco SNMP managers have had to >> disable SNMP support in our products to keep them from locking >> up every few minutes. > > I was just googling +'ifPhysAddress.0' > > It seems you are not alone :-) > > http://mtsc.moxa.com:8888/Software/DN/NPort/Firmware/NPort%205000/NPort%205600/ver3.2/VERSION.TXT > > <quote> > ver3.1 (2006/05/16) > > 3. Fixed the problem that querying NPort by SNMP Software would cause NPort > stop replying ethernet packet > > while querying "GET iso.3.6.1.2.1.2.2.1.6.0", which is resolved as > > "GET > iso.org.dod.internet.mgmt.mib-2.interface.ifTable.ifEntry.ifPhysAddress.0". > </quote> > > > UCD-SNMP had a lot of holes. eCos UCD-SNMP implementation has even more > holes :-(
Feel free to improve this - much of the networking code, including SNMP, is more than seven (7!) years old. A lot has gone on in the world in that time... -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------ -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
