$ uname -a Linux xxx 2.6.9-22.0.1.ELsmp #1 SMP Thu Oct 27 13:14:25 CDT 2005 i686 i686 i386 GNU/Linux $ lsmod | grep "[^0-9]0" | grepbyhand ip_gre 16865 0 3c59x 41213 0 tg3 85061 0 It is very likely an error that these have usage counts of 0. (the interfaces are very much up, and a GRE tunnel is configured) Seeing as the same thing happens with bcm5700 modules from HP it's likely this is not actually a module problem but a more basic networking logic fault. I can't test whether removing tg3/3c59x will result in a panic, but removing the ip_gre module broke the system (praise ilo...) - Not posting a trace since it's obvious why it broke... Comments? Cheers, MaZe