How can I disable ports on network equipment with SNMP support?

####################################START SCRIPT ###################################
#!/bin/bash
#Find,disable,enable port using SNMP at Cisco switch
#Reference documentation http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a00801c9199.shtml
#Example: cd <directory> ./snmp_cisco.sh 192.168.128.13 00:10:5A:F6:CF:37 e
#Where:
#- 1st parameter is switch IP address
#- 2nd is MAC-address of NIC
#- 3rd is operation(e - enable port when find description at port, d -disable port when find MAC, f - find MAC address in switch address table)
#Variables descriptions
switch_ip=$1;
mac=$(echo $2 | sed 's/://g');
community="ppublic";
operation=$3;
#We have created 3 procedure below
#For Cisco 3550
3550_get_port(){
#Check for vlans and find MAC at port
for i in `snmpwalk -On -v2c -c $community@1 192.168.128.13 .1.3.6.1.4.1.9.9.46.1.3.1.1.2  | sed 's/.1.3.6.1.4.1.9.9.46.1.3.1.1.2.1.//g'  | awk '{print $1}'`; do
        find_mac=`snmpwalk -On -v2c -c  $community@$i 192.168.128.13 .1.3.6.1.2.1.17.4.3.1.1 | sed s/' '//g  | grep -i $mac | sed 's/^.*Hex-STRING\://g'| awk '{print $1}'`;
        if [[ $find_mac != "" ]]; then
                point1=$(snmpwalk -On -v2c -c $community@$i $switch_ip .1.3.6.1.2.1.17.4.3.1.1 | sed s/' '//g  | grep -i $mac  | sed 's/.1.3.6.1.2.1.17.4.3.1.1.//g' | sed 's/=.*//g' );
                port_numb=`snmpwalk -v2c -c $community@$i $switch_ip .1.3.6.1.2.1.17.4.3.1.2  | grep -i $point1 | sed 's/^.*INTEGER\: //g'`;
                echo "MAC $mac was found in VLAN $i at port number #"$port_numb;
        fi
done;
}
disable_port(){
        3550_get_port;
        echo "Going to disable port #"$port_numb;
        #Before disable we write description  to port
        snmpset -v2c -c $community $switch_ip .1.3.6.1.2.1.31.1.1.1.18.$port_numb s "$mac";
        #Disable port by MAC
        snmpset -v2c -c $community $switch_ip .1.3.6.1.2.1.2.2.1.7.$port_numb i 2;
        #Save running config of Cisco switch to startup
        save_3550_cfg;
}
enable_port(){
        echo "Going to enable port by MAC";
        #Find MAC by port description
        port_to_enable=`snmpwalk -v2c -On -c $community $switch_ip .1.3.6.1.2.1.31.1.1.1.18 | grep -i $mac | sed 's/.1.3.6.1.2.1.31.1.1.1.18.//g' | awk '{print $1}'`;
        #If port was not found
        if [[ $port_to_enable == "" ]]; then
                echo "MAC wasn't found by port description. Exiting ...";
                3550_get_port;
                $port_to_enable=$port_numb;
                echo $ $port_to_enable;
                exit;
        fi;
        #Enable  port
        snmpset -v2c -c $community $switch_
ip .1.3.6.1.2.1.2.2.1.7.$port_to_enable i 1;
        #Save running config of Cisco switch to startup
        save_3550_cfg;
}
save_3550_cfg(){
        echo "Saving Cisco 3550 switch configuration";
         snmpset -t60 -v2c -c $community $switch_ip 1.3.6.1.4.1.9.2.1.54.0 i 1
}
main(){
        if [[ $operation == "f" ]]; then
                echo "Find port operation";
                3550_get_port;
        elif [[ $operation == "d" ]]; then
                echo "Disable port operation";
                disable_port;
        elif [[ $operation == "e" ]]; then
                echo "Enable port operation";
                enable_port;
        else
                echo "Wrong arguments given";
        fi;
}
main;
####################################END SCRIPT ###################################