The 'brctl' utility segfaults when a bridge is named 'bridge' (which seemed like a more descriptive name to me than 'br0'). E.g. # brctl addbr bridge # brctl show bridge name bridge id STP enabled interfaces . zsh: segmentation fault brctl show This is broken in net-misc/bridge-utils 1.4. I found the solution reported via Debian's bug tracker against their bridge-utils 1.2-1: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=431860#10
Created attachment 197599 [details, diff] Patch for net-misc/bridge-utils-1.4 Patch from Debian bug 431860, modified for v.1.4.
This is already in bridge-utils-1.5