David, When I've seen PCS statistical errors before, it pointed to either a failing optic that needed replaced in our MX or a drastic change in optical light levels caused by an OSP fiber issue. How do your "show interface diagnostic optic" levels look?
On Wed, Oct 19, 2016 at 7:40 PM, David B Funk <dbf...@engineering.uiowa.edu> wrote: > I've got a couple of 10Gig-eth interfaces (xe- on MX480) of which I'm > trying to interpret the "PCS statistics" values. > > One of them is pretty steady at: > > PCS statistics Seconds > Bit errors 4 > Errored blocks 4 > > The other one seems to vary with the values ranging from 10 to 70. > EG: > > PCS statistics Seconds > Bit errors 61 > Errored blocks 69 > > The second interface will will trigger a number of error conditions at the > other end which terminates in a Cisco router with out showing any error > conditions at my end (EG BPDU Error: None, MAC-REWRITE Error: None, > CRC/Align errors 0, FIFO errors 0, etc..) During some of these times I'll > see significant packet loss and others see minimal problems. > > According to Juniper docs the PCS statistics should mean: > > PCS statistics > (10-Gigabit Ethernet interfaces) Displays Physical Coding Sublayer (PCS) > fault > conditions from the WAN PHY or the LAN PHY device. > > Bit errors—High bit error rate. Indicates the number of bit errors > when the > PCS receiver is operating in normal mode. > Errored blocks—Loss of block lock. The number of errored blocks when > PCS > receiver is operating in normal mode. > > But I don't know how to interpret a value of "16 seconds" with that > definition. > Can anybody shed some light on what those numbers mean. > > Thanks. > > > -- > Dave Funk University of Iowa > <dbfunk (at) engineering.uiowa.edu> College of Engineering > 319/335-5751 FAX: 319/384-0549 1256 Seamans Center > Sys_admin/Postmaster/cell_admin Iowa City, IA 52242-1527 > #include <std_disclaimer.h> > Better is not better, 'standard' is better. B{ > _______________________________________________ > juniper-nsp mailing list juniper-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/juniper-nsp -- [image: photo] *Michael Carey* Director of Operations, KINBER 717-963-7490 <717-963-7490?utm_source=WiseStamp&utm_medium=email&utm_term=&utm_content=&utm_campaign=signature> | 814-777-5027 <814-777-5027?utm_source=WiseStamp&utm_medium=email&utm_term=&utm_content=&utm_campaign=signature> | mca...@kinber.org | 5775 Allentown Blvd., Suite 101, Harrisburg, PA 17112 <https://www.facebook.com/Keystone-Initiative-for-Network-Based-Education-and-Research-188743104566075/?utm_source=WiseStamp&utm_medium=email&utm_term=&utm_content=&utm_campaign=signature> <http://www.twitter.com/kinber?utm_source=WiseStamp&utm_medium=email&utm_term=&utm_content=&utm_campaign=signature> <https://www.linkedin.com/company/kinber-keystone-initiative-for-network-based-education-and-research-?utm_source=WiseStamp&utm_medium=email&utm_term=&utm_content=&utm_campaign=signature> <https://vimeo.com/kinber/videos?utm_source=WiseStamp&utm_medium=email&utm_term=&utm_content=&utm_campaign=signature> _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp