New answers tagged ethernet
Try update your driver. Don't know where it is for Ubuntu or what version recommended but for CentOS or EL 6 it is: http://mirror.symnds.com/distributions/elrepo/elrepo/el6/x86_64/RPMS/kmod-e1000e-220.127.116.11-1.el6.elrepo.x86_64.rpm
The key to this mystery is the error you're getting from ping: sendmsg: No buffer space available. This means that packets aren't just being dropped somewhere, they're actually getting "clogged up" in the guest somewhere. This is, in a physical machine, an indication that the kernel driver and/or hardware are buggy; similarly, in a VM, it means you've got ...
It means the cable has a short circuit. Test from each end and check the distance result. The cable is probably damaged in the middle somewhere. Maybe mice, maybe damaged when pulled. If it's not in a wall it's probably been pinched in a door or by furniture... or it's been stepped on one too many times. John S
You need a straight-through cable since repeaters act as 'switch'. Reference: http://www.cisco.com/c/en/us/support/docs/routers/10000-series-routers/46792-ethbase.html
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