diff --git a/munin/uptime_switch b/munin/uptime_switch
index affa112a..117f8831 100755
--- a/munin/uptime_switch
+++ b/munin/uptime_switch
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/zsh
 #
 # Plugin to measure uptime. Especially the average and max values on the
 # bigger graphs (yearly) can be interesting.
@@ -10,21 +10,20 @@ if [ "$1" = "autoconf" ]; then
 	exit 0
 fi
 
-if [ "$1" = "config" ]; then
+switchs=(multiprise backbone\
+         `host -l adm.crans.org | sed -ne 's/\(bat[a-u]-[0-9]\).*$/\1/p'`)
 
+if [ "$1" = "config" ]; then
         echo "host_name uptime.switchs.crans.org"
 	echo 'graph_title Uptime'
 	echo 'graph_args --base 1000 -l 0 '
 	echo 'graph_vlabel uptime in days'
-for i in multiprise \
-         `host -l adm.crans.org | sed -ne 's/\(bat[a-u]-[0-9]\).*$/\1/p'`; do
-	echo "${i/-/}.label uptime $i"; done
+	for i in $switchs; do echo "${i/-/}.label uptime $i"; done
 	exit 0
 fi
 
-for i in multiprise \
-         `host -l adm.crans.org | sed -ne 's/\(bat[a-u]-[0-9]\).*$/\1/p'`; do
-  snmpget -t 0.05 -O v -v 1 -c public $i sysUpTimeInstance 2> /dev/null | \
+for i in $switchs; do
+  snmpget -t 0.05 -O v -v 1 -c public $i.adm sysUpTimeInstance 2> /dev/null | \
   perl -nle "{ /\d+/; print sprintf(\"${i/-/}.value %.2f\", ($&/8640000));}"&
 done