diff --git a/xCAT/postscripts/configib b/xCAT/postscripts/configib
index b6ecac289f..56e344a998 100755
--- a/xCAT/postscripts/configib
+++ b/xCAT/postscripts/configib
@@ -439,12 +439,16 @@ IPADDR=$nicip" > $dir/ifcfg-$nic
 					   name="${array_extra_param_names[$i]}"
 					   value="${array_extra_param_values[$i]}"
 					   echo "  $i: name=$name value=$value"
+                       if [[ "$OSVER" =~ (rhels9|alma9|rocky9) ]]; then
+                           nmcli con modify $con_name $name $value
+                       else
                                            grep -i "${name}" $dir/ifcfg-$nic
                                            if [ $? -eq 0 ];then
                                                sed -i "s/.*${name}.*/${name}=${value}/i" >> $dir/ifcfg-$nic
                                            else
                                                echo "${name}=${value}" >> $dir/ifcfg-$nic
                                            fi
+                       fi
 					   i=$((i+1))
 				   done		
 			   else # not the first ip address
@@ -471,12 +475,16 @@ IPADDR_$ipindex=$nicip" >> $dir/ifcfg-$nic
 					   name="${array_extra_param_names[$i]}"
 					   value="${array_extra_param_values[$i]}"
 					   echo "  $i: name=$name value=$value"
+                       if [[ "$OSVER" =~ (rhels9|alma9|rocky9) ]]; then
+                           nmcli con modify $con_name $name $value
+                       else
                                            grep -i "${name}" $dir/ifcfg-$nic
                                            if [ $? -eq 0 ];then
                                                sed -i "s/.*${name}.*/${name}=${value}/i" >> $dir/ifcfg-$nic
                                            else
                                                echo "${name}=${value}" >> $dir/ifcfg-$nic
                                            fi
+                       fi
 					   i=$((i+1))
 				   done		
                 fi # end if [ $ipindex -eq 1 ]
@@ -528,12 +536,16 @@ IPADDR=$nicip" > $dir/ifcfg-$nic
 						name="${array_extra_param_names[$i]}"
 						value="${array_extra_param_values[$i]}"
 						echo "  $i: name=$name value=$value"
+                        if [[ "$OSVER" =~ (rhels9|alma9|rocky9) ]]; then
+                            nmcli con modify $con_name $name $value
+                        else
                                                 grep -i "${name}" $dir/ifcfg-$nic
                                                 if [ $? -eq 0 ];then
                                                     sed -i "s/.*${name}.*/${name}=${value}/i" >> $dir/ifcfg-$nic
                                                 else
                                                     echo "${name}=${value}" >> $dir/ifcfg-$nic
                                                 fi
+                        fi
 						i=$((i+1))
 					done		
                else # not the first ip address
@@ -593,12 +605,16 @@ IPADDR$ipindex=$nicip"
 							name="${array_extra_param_names[$i]}"
 							value="${array_extra_param_values[$i]}"
 							echo "  $i: name=$name value=$value"
+                            if [[ "$OSVER" =~ (rhels9|alma9|rocky9) ]]; then
+                                nmcli con modify $con_name $name $value
+                            else
                                                         grep -i "${name}" $cfgfile
                                                         if [ $? -eq 0 ];then
                                                             sed -i "s/.*${name}.*/${name}=${value}/i" >> $cfgfile
                                                         else
                                                             echo "${name}=${value}" >> $cfgfile
                                                         fi
+                            fi
 							i=$((i+1))
 						done		
 
@@ -772,7 +788,9 @@ then
                 done
             else 
                 if [ $nmcli_used -eq 1 ]; then
-                    nmcli con reload $dir/ifcfg-$nic
+                    if ! [[ "$OSVER" =~ (rhels9|alma9|rocky9) ]]; then
+                        nmcli con reload $dir/ifcfg-$nic
+                    fi
                     nmcli con up $nic 2>&1
                 else
                     ifup $nic > /dev/null 2>&1