A and B uses A or Bs infrastructure at eighter end of the link? Or a common third party somewhere in the signal path. Den 20 aug 2013 05:23 skrev "CiscoNSP List" <cisconsp_l...@hotmail.com>:
> Thanks Blake - > > Both links (that drop) are doing minimal traffic (One is only a backup > link, so isnt used) - the link that is not affected is doing > ~100-150Mb/sec, Carrier A link is doing 5-10Mb/sec and Carrier B virtually > zero(As it's a backup link as mentioned)....seeing minimal output drops on > each port > > All links are Gb (physical), and carrier rate limits (Carrier A 50M, > Carrier B 200M and carrier C 1Gb) > > > > From: iki...@gmail.com > Date: Mon, 19 Aug 2013 21:51:10 -0500 > Subject: Re: [c-nsp] Simultaneous drops - 2 upstream providers > To: cisconsp_l...@hotmail.com > CC: cisco-nsp@puck.nether.net > > You don't give too much information here, so its hard to speculate. > > My guess as to the first thing to check would be out of buffer drops on > the 37x, but like I said above, it's only really a wild guess, since you > don't specify port layout or link speeds. You can verify by looking at the > ASIC stats, as the interface stats can be unreliable for that type of drop. > > > > -Blake > > > On Mon, Aug 19, 2013 at 9:11 PM, CiscoNSP List <cisconsp_l...@hotmail.com> > wrote: > > > Hi - bit of a strange one - We have 3 interpop links (3 different > carriers) terminating on a 3750X+ASR at one of our POPs, and are seeing > intermittent drops on 2 of the links(And ospf loses adjancency) at the same > time > > > > Carrier A - POPA -> POPB - We see drops/ospf adjancency issues once/twice > a dayCarrier B - POPA -> POPC - We see drops/ospf adjancency issues > once/twice a dayCarrier C - POPA -> POPB - No issues at all > > All links terminate on the same 3750, and then are trunked to an ASR1006 > for L3 - There are no errors/physical link issues on the 3750, and both > carriers also do not see any errors/link drops. > > It would be improbable that both carriers have issues on there networks at > precisely the same time, so it is either our switch(3750), or something > weird happening with the x-connects that doesnt cause the links to drop, > doesnt cause any errors etc, but causes ospf to lose adjacency (but only > for 2 providers, not the third?) > > > > Any suggestions/assistance is greatly appreciated > > > > _______________________________________________ > > cisco-nsp mailing list cisco-nsp@puck.nether.net > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > > > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/