snmpd reports ioctl 35123 returned -1

xen chart The updated version of snmpd in Debian Etch doesn't seem to like our customised vif interfaces names that we're using for Xen hosting. I'm seeing the error "ioctl 35123 returned -1" in syslog every 5 minutes. Reverting to the standard "vifx.y" format fixes the problem.

I started using xen guest names for vif interfaces to allow our graphing system (Cacti) to keep track of which interface matched a particular guest. For example a guest called acme would have an interface called acme.eth0 in the xen host instead of a dynamically generated name like vif14.0. This seemed to be working fine with Sarge, but alas not with Etch. I tried some variations like acme-eth0 and acme.0, but nothing seems to get rid of the error except vifx.y.