Forum Discussion
computer_41235
Nimbostratus
NimbostratusF5 outside flow Bandwidth control
Hi experts,
I have one question on the link environment deployment.
1. Environment Description
F5 works as the link access device in the edge of the data center. There are totally three links connected to F5 (ISP1 - 1Gbps, ISP2 - 1Gbps, ISP3 - 1Gbps). All the traffic OUTSIDE from data center would go through the F5 box. And F5 would determine the best way to go out based on the destination IP address.
2. Customer Requirement
Sometimes when the link of ISP1 already reached around 100% (1Gbps) there are still not too much traffic in other ISP links.
Customer's requirement is: When the traffic in one of the links reaches about 90% (900Mbps), all the new connections towards to this ISP would be routed through the other 2 links.
And when the load for the high traffic link down to about 70% (700Mbps), all the new connections would be routed based on the original policy (IP address).
I am not sure if you guys have some script to resolve this problem.
Thanks.
4 Replies
marco_octavian_It's been a while but from what I remember, all this is feasible with Link Controller. Are you running just the LTM module? If so, you will have some flexibility but you will be limited. You really need a Link Controller or GTM license to do what you want. Whatv version and hardware are you on?
Browse through the manual called "Link Controller Implementations" and look at the chapter on "Implementing Bandwidth Load Balancing". After that, come back with follow-up questions.
computer_41235I only have F5 BIG-IP LTM VIPRION 2400
The use of the software version is V11.4
Link Controller can only do control for inside traffic, but do not control for OUTSIDE traffic
I now is LTM only OUTSIDE flow control- marco_octavian_I may be misunderstanding the question a bit, but LC/GTM combo can assist with inboud or oubound traffic. Did you check out the manual? I haven't done much LC in a few years now because I just don't get the calls anymore but please review the manual and let me know if I misunderstood. As you know, with any product, you have what is really called Traffic Shaping when it comes to traffic leaving for the internet. (Let me not get sidetracked here.) Having said that, if you have LTM only, I think this it is possible but it will probably take some work. The real problem is going to be, "How to monitor/check the bandwidth?" I don't believe there is a built in tool/command for that. You may have to have your mgmt station or some device poll via snmp the stats for the interface to know when bandwidth is an issue. From there you could use iControl or a script to log on to the box and issue the appropriate tmsh commands.
- computer_41235The following equipment is used in test A10 script link switch code, I would like to ask that we do OUTSIDE traffic switching F5 how to write such a script , LC OR GTM only do INBOUND traffic
But I want to achieve OUTSIDE traffic link switchingcheck-gzct2 30 3 30 1 EXTERNAL 1 External script checkvlan used by monitor check-gzct2 !!! Content Begin !!! !/bin/sh axAPI() { groupname=$1 linkIP=$2 action=$3 toweight=$4 priority=$5 mysession=`curl -s -d "method=authenticate&username=axapi&password=a10axapi" http://127.0.0.1/services/rest/V1/ | awk -F \> '{print $4}' | awk -F \< '{print $1} '` case $action in "1") a=`curl -s -d "session_id=$mysession&method=slb.server.update&address=$linkIP&weight=$toweight" http://127.0.0.1/services/rest/V1/`;; "2") a=`curl -s -d "session_id=$mysession&method=slb.service-group.update&name=$1&member-list=member1&member1=address%03$linkIP%02port%030%02priority%03$priority" http://127.0.0.1/services/rest/V1/`;; esac c=`curl -s "http://127.0.0.1/services/rest/V1/?method=session.close&session_id=$mysession"` } toasc() { i=1 server=$1 printf ${server} printf "." while (( i <= ${server} )) do char=$(expr substr "$server" $i 1) printf "%d" \'"$char" (( i += 1 )) if [ $i -le ${server} ]; then printf "." fi done } total=`expr $3 / 10 ` threshold=`expr $4 / 10 ` count=1 if [ -f $2_count ]; then count=`cat $2_count | awk ' { print \$1 } '` fi if test $count -le 1 ; then oid=".1.3.6.1.4.1.22610.2.4.3.2.2.2.1.6." server="$(toasc "$2")" portusage=`snmpget -v 2c -c a10snmp 127.0.0.1 $oid$server | awk ' { print $4} '` t=`date` echo "$t: Jian Test $2: usage is $portusage " oldpu=$portusage if [ -f $2_pu ]; then oldpu=`cat $2_pu | awk ' { print \$1 } '` fi echo $portusage >$2_pu realpu=`expr $portusage - $oldpu ` used=`expr $realpu \* 8 / 10000000 / 120 ` weight=`expr $total - $used` echo "$t: Jian Test $2: real weight is $weight" if test $weight -lt 1 ; then weight=1 fi if test $used -ge $threshold; then weight=1 fi echo "$t: Jian Test $2: weight is $weight" axAPI link $2 1 $weight fi if test $count -ge 4 ; then count=0 fi countupdate=`expr $count + 1 ` echo $countupdate > $2_count Test_IP=("222.68.185.229" "211.95.72.229" "58.248.42.181" "211.94.128.24" "219.141.157.30" "220.181.6.175" "61.135.169.105" "58.242.1.187" "202.102.194.50" "202.103.124.34" ) i=0 while [ $i -le 9 ] do route del -host ${Test_IP[$i]} gw $2 route add -host ${Test_IP[$i]} gw $2 ret=$? if test $ret -gt 0; then exit 1 fi curl --max-time 1 --interface $1 ${Test_IP[$i]} > /dev/null 2>&1 ret=$? route del -host ${Test_IP[$i]} gw $2 t=`date` if test $ret == 0 ; then echo "$t Testing $2-$i: ${Test_IP[$i]} OK" echo "$t $2 Passed" exit 0 else echo "$t Testing $2-$i: ${Test_IP[$i]} Fail" fi i=`expr $i + 1` done echo "$t $2 Failed" exit 1 !!! Content End !!!
