hwchiu

1. mininet: mn --controller=remote,ip=127.0.0.1 --topo topo --custom topo.py
2. h1 ping h4
3. open other terminal
4. type "ovs-ofctl dump-flows s2" to make sure the flow is pass through s2.
5. type "ifocnfig s1-eth1" to shutdown the link between s1 and s2
6. The result in the mininet promt:

64 bytes from 10.0.0.4: icmp_req=71 ttl=64 time=0.028 ms
64 bytes from 10.0.0.4: icmp_req=72 ttl=64 time=195 ms
64 bytes from 10.0.0.4: icmp_req=73 ttl=64 time=0.157 ms

hwchiu

@左邊電腦

1. root@controller:/ neturon-server @tty1
2. root@controller:/home/amy/floodlight_ecmp/: floodlight ..... @tty2
3. 等他跑一下，可以看floodlight console有沒有噴計算完畢相關的訊息

@右邊筆電

1. root@controller:/ cd home/amy/code_test/$VAR1 screen-9
2. sh simple_random_VM..sh Ubuntu-exp2 執行此指令去創造vm

hwchiu

    protected Command processPacketInMessage(IOFSwitch sw, OFPacketIn pi,
                                             FloodlightContext cntx) {
        Ethernet eth =
                IFloodlightProviderService.bcStore.
                get(cntx,IFloodlightProviderService.CONTEXT_PI_PAYLOAD);
        logger.error("ethernet:{}",eth.toString());
    ....
    ....
    ...

hwchiu

Create topology

sudo mn --topo single,3 --mac

Configuration

• In the mininet prompt
  1. h3 ifconfig h3-eth0 30.0.0.3
  2. h1 route add default gw 10.0.0.254 h1-eth0

3. h3 route add default gw 30.0.0.254 h3-eth0

hwchiu

各位師長、家長以及在座所有的畢業生們大家好，

今天，是個特別的日子
為什麼特別?
是因為一群人穿者碩士袍聚在一起?
還是因為你父母從遠方而來參加這場畢業典禮?
亦或是你等等準備上台接受撥穗?
都不是
真正的特別的是，過了今天以後，你還是不能畢業

hwchiu

#include<iostream>
using namespace std;
int rightLine,leftLine,upperLine,downLine;
int t1,t2,t3,t4;
int main(){
    int times;
    int count;
    cin >> times;
    for(int i=0;i<times;i++){
        cin >> count;

hwchiu

##SDN## ###Definition https://www.opennetworking.org/sdn-resources/sdn-definition

Releated paper

##Openflow##

hwchiu

#!/usr/bin/python

"""
Example to create a Mininet topology and connect it to the internet via NAT
through eth0 on the host.

Glen Gibb, February 2011

(slight modifications by BL, 5/13)
"""

hwchiu

#!/usr/bin/perl
select(STDOUT);
$| = 2;
while (<>) {
    print "[".localtime()."] $_"
}

hwchiu

Flow path highlight

• 定期透過 restful api 從controller那邊取得每個switch上面的flow entry資訊
• 使用者輸入其想要觀察的封包特徵與進入點的switch
• 根據flow entry去模擬match的結果，然後把封包的流向給顯示

Detail flow statistics

• 使用者輸入想要觀察的流量特徵
• 加入一筆完全符合該特徵的flow entry到switch的table 0,並且把actions設為 "goto table 1"
• table 1裡面的flow entry就放本來routing相關的rule