diff -ur iproute2.orig/ip/ifcfg iproute2/ip/ifcfg --- iproute2.orig/ip/ifcfg 2000-04-16 19:42:50.000000000 +0200 +++ iproute2/ip/ifcfg 2002-07-07 18:45:42.000000000 +0200 @@ -21,7 +21,7 @@ ABCMaskLen () { local class; - class=${1%%.*} + typeset -i class=${1%%.*} if [ "$1" = "" -o $class -eq 0 -o $class -ge 224 ]; then return 0 elif [ $class -ge 224 ]; then return 0 elif [ $class -ge 192 ]; then return 24