We are using Arista branded twinax cables. I believe the CRC errors are either from the resetting of the card on the local box, or, the resetting of cards while sending on other boxes on the local network. Since the Arista 7124SX switch is a cut through swith, it will happily forward on bad packets...
Thanks, Brian -----Original Message----- From: Alexander Duyck [mailto:[email protected]] Sent: Friday, June 22, 2012 4:31 PM To: Brian T. O'Neill Cc: [email protected] Subject: Re: [E1000-devel] Issue with ixgbe driver with continual lsc_int's On 06/22/2012 08:07 AM, Brian T. O'Neill wrote: > We have an issue with X520-DA cards when they are connected to Arista 7124SX > switches, and only these switches. All our other Arista switches are fine. > The issue is that we have continual increasing lsc_int values via ethtool, > with it sometimes taking the link down, others not. It's not the switch ports > or cables, as, replacing with a non-Intel 10G card has no issues. We have had > this issue, with varying degrees of how often we get the lsc_int's, with > dozens of cards, some do it 100's of times a minute, others do it 100 times a > day. We have had this occur on Dell R610's, Dell 2950's, and Dell 1950's. We > have 100's of X520-DA's working perfectly on 3 other models of Arista > switches (which have a higher latency). Nothing on the switch shows any > issues. We have seen this on the native CentOS 5.4 and 6.2 ixgbe drivers, as > well as a compiled 3.9.17 driver. > > Any help with first figuring out what would cause it to keep needing to > reenable it's irq's would great, and hopefully might lead to root cause. > Below is some debug out from the driver as well as ethtool -S output. > > Thanks, > Brian [...] > NIC statistics: > > rx_packets: 128069 > > tx_packets: 6774870 > > rx_bytes: 12813602 > > tx_bytes: 731663757 > > rx_errors: 22535 > > rx_crc_errors: 21866 > > lsc_int: 1608249 So it looks like you are getting a number of CRC errors and also having link issues. What are you using to link the switches to these adapters. Are you using direct-attach cables or SFP modules? Thanks, Alex ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ E1000-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
