常連

自宅にサーバを立てています。
外から接続させるためルーターでポートフォーディングを使ってますが、
速度かなり遅くて困っています。
（aを打つと0.5秒後にaが出ます。）

この場合、どこがネックになって遅いのか特定し改善したいですが、
トブルシューテンングのコツがあれば教えていただけますか。


スペックは8コア memory 16GB SSD 256GBで
インターネット回線がJCOMを使ってます。（かなり遅い回線ではありますが、SSHするのに多くの帯域は使ってないと思いますが、、）

構成
外 -> DDNSのIPを持ってるルーター(port:4922) ->  KVM server(bridge) ->  KVMゲストOS(port:22)

・4922からくるアクセスはKVMゲストOSの22番ポートに転送している
・ルーターは商用ソフトがあってGUI上でポートフォーディング設定できる


ルーターのIP : 192.168.0.1(商用機器shell接続できない）
KVM: 192.168.0.44(ubuntu 12.10)
KVMゲストOS: 192.168.0.49(centos 6.4)

自宅サーバへssh接続して操作するのに速度が遅い

### 実現したいこと

サブインターフェースを使って、VLAN間通信がしたい。

### 発生している問題
PC1⇔PC3、PC2⇔PC4の間でPingが通らない

### 構成図

※GNS3

![![イメージ説明](7d3a187f62a82d3645bbb9cdd80afffe.png)](be0e4c95d8935059f6c0fc3cc9d1f0d8.png)

###状態

◆R1

![イメージ説明](a8fb002a0a87d9dc0b92f3ea19e02565.png)

◆ESW1
![イメージ説明](65600a0c846bd63a9742cd6db4a81f48.png)
![イメージ説明](9be6bfdc58cc3673a0a2efb83ee6533b.png)

・ポートの状況
```
ESW1#show interface FastEthernet1/1 switchport
Name: Fa1/1
Switchport: Enabled
Administrative Mode: static access
Operational Mode: static access
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: Disabled
Access Mode VLAN: 100 (VLAN0100)
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: ALL
Trunking VLANs Active: 100
Priority for untagged frames: 0
Override vlan tag priority: FALSE
Voice VLAN: none
Appliance trust: none
ESW1#show interface FastEthernet1/2 switchport
Name: Fa1/2
Switchport: Enabled
Administrative Mode: static access
Operational Mode: static access
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: Disabled
Access Mode VLAN: 100 (VLAN0100)
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: ALL
Trunking VLANs Active: 100
Priority for untagged frames: 0
Override vlan tag priority: FALSE
Voice VLAN: none
Appliance trust: none
ESW1#show interface FastEthernet1/3 switchport
Name: Fa1/3
Switchport: Enabled
Administrative Mode: static access
Operational Mode: static access
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: Disabled
Access Mode VLAN: 200 (VLAN0200)
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: ALL
Trunking VLANs Active: 200
Priority for untagged frames: 0
Override vlan tag priority: FALSE
Voice VLAN: none
Appliance trust: none
ESW1#show interface FastEthernet1/4 switchport
Name: Fa1/4
Switchport: Enabled
Administrative Mode: static access
Operational Mode: static access
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: Disabled
Access Mode VLAN: 200 (VLAN0200)
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: ALL
Trunking VLANs Active: 200
Priority for untagged frames: 0
Override vlan tag priority: FALSE
Voice VLAN: none
Appliance trust: none
ESW1#show interface FastEthernet1/10 switchport
Name: Fa1/10
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Disabled
Access Mode VLAN: 0 ((Inactive))
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: ALL
Trunking VLANs Active: 1,100,200
Priority for untagged frames: 0
Override vlan tag priority: FALSE
Voice VLAN: none
Appliance trust: none
ESW1#
```

###Config

◆R1
```
R1#show conf
Using 1222 out of 522232 bytes!
!
!
!
!

!
! Last configuration change at 15:44:53 UTC Sat Apr 17 2021
!
upgrade fpd auto
version 15.0
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
!
!
ip source-route
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
redundancy
!
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex half
 !
!
interface FastEthernet1/0
 no ip address
 duplex half
 !
!
interface FastEthernet1/0.1
 encapsulation dot1Q 100
 ip address 192.168.0.254 255.255.255.0
!
interface FastEthernet1/0.2
 encapsulation dot1Q 200
 ip address 192.168.1.254 255.255.255.0
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
!
no cdp log mismatch duplex
!
!
!
!
!
!
control-plane
 !
!
!
mgcp fax t38 ecm
mgcp behavior g729-variants static-pt
!
!
!
gatekeeper
 shutdown
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line vty 0 4
 login
!
end

R1# show conf
Using 1222 out of 522232 bytes!
!
!
!
!

!
! Last configuration change at 15:44:53 UTC Sat Apr 17 2021
!
upgrade fpd auto
version 15.0
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
!
!
ip source-route
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
redundancy
!
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex half
 !
!
interface FastEthernet1/0
 no ip address
 duplex half
 !
!
interface FastEthernet1/0.1
 encapsulation dot1Q 100
 ip address 192.168.0.254 255.255.255.0
!
interface FastEthernet1/0.2
 encapsulation dot1Q 200
 ip address 192.168.1.254 255.255.255.0
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
!
no cdp log mismatch duplex
!
!
!
!
!
!
control-plane
 !
!
!
mgcp fax t38 ecm
mgcp behavior g729-variants static-pt
!
!
!
gatekeeper
 shutdown
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line vty 0 4
 login
!
end

R1#
```

◆ESW1
```
ESW1#show conf
Using 2791 out of 57336 bytes!

!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
no service dhcp
!
hostname ESW1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip routing
no ip icmp rate-limit unreachable
no ip cef
!
!
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
vtp file nvram:vlan.dat

!
!
ip tcp synwait-time 5
!
!
!
!
!
interface FastEthernet0/0
 description *** Unused for Layer2 EtherSwitch ***
 no ip address
 no ip route-cache
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/1
 description *** Unused for Layer2 EtherSwitch ***
 no ip address
 no ip route-cache
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet1/0
 duplex full
 speed 100
!
interface FastEthernet1/1
 switchport access vlan 100
 duplex full
 speed 100
!
interface FastEthernet1/2
 switchport access vlan 100
 duplex full
 speed 100
!
interface FastEthernet1/3
 switchport access vlan 200
 duplex full
 speed 100
!
interface FastEthernet1/4
 switchport access vlan 200
 duplex full
 speed 100
!
interface FastEthernet1/5
 duplex full
 speed 100
!
interface FastEthernet1/6
 duplex full
 speed 100
!
interface FastEthernet1/7
 duplex full
 speed 100
!
interface FastEthernet1/8
 duplex full
 speed 100
!
interface FastEthernet1/9
 duplex full
 speed 100
!
interface FastEthernet1/10
 switchport mode trunk
 duplex full
 speed 100
!
interface FastEthernet1/11
 duplex full
 speed 100
!
interface FastEthernet1/12
 duplex full
 speed 100
!
interface FastEthernet1/13
 duplex full
 speed 100
!
interface FastEthernet1/14
 duplex full
 speed 100
!
interface FastEthernet1/15
 duplex full
 speed 100
!
interface Vlan1
 no ip address
 no ip route-cache
 shutdown
!
interface Vlan100
 no ip address
!
interface Vlan200
 no ip address
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
no cdp log mismatch duplex
!
!
!
control-plane
!
!
!
!
mgcp behavior g729-variants static-pt
!
!
!
!
!
banner exec ^C

***************************************************************
This is a normal Router with a SW module inside (NM-16ESW)
It has been preconfigured with hard coded speed and duplex

To create vlans use the command "vlan database" from exec mode
After creating all desired vlans use "exit" to apply the config

To view existing vlans use the command "show vlan-switch brief"

Warning: You are using an old IOS image for this router.
Please update the IOS to enable the "macro" command!
***************************************************************

^C
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end

ESW1#
```
◆PC1
![イメージ説明](d0a50a94d6aaec7191ca32f0d5ab1274.png)
◆PC2
![イメージ説明](049e35b3132f9477795a233448e20fad.png)
◆PC3
![イメージ説明](40afa88ef73a799b06bd7bd9c9fa10c3.png)
◆PC4
![イメージ説明](92cbbee28aba1fb1bf47cb5d64674dc1.png)
---
### 追記

◆ESW1のトランクポートの状況
![イメージ説明](e937add03462563053764dd2f4aa2d74.png)

◆PC⇒ルータ間の通信状況
・PC1⇒サブIF 1/0.1
・PC1⇒サブIF 1/0.2
・PC1⇒PC3
![イメージ説明](23817a75bfd3aaa20f7eee2940838a31.png)

◆(参考)R1⇒PC1、R1⇒PC3の通信状況
![イメージ説明](92a70479e4ab4391ab1462c264e0b6a0.png)

どなたかお知恵をお貸しいただければ幸いです。
どうぞよろしくお願いいたします。

サブインターフェースを使ったVLAN間通信ができない

#やりたいこと
pythonでMininetのトポロジーを構築し、iperfをノード上で実行します。
そこで、ノードで実行したiperfの出力をコマンドプロンプト上に表示させたいです。

#困っていること
プログラム上のh2_pidで実行している"iperf -c ～"のコマンドを実行した際の出力をコマンドプロンプト上に表示させたいのですが、iperfの出力が表示されません。
そこで、iperfの出力をコマンドプロンプト上に表示させるためには、どこを修正する必要があるのでしょうか？
有識者の方々、ご教授の程よろしくお願いします。

# プログラム
現在のプログラムを示します。
```python
#!/usr/bin/python

from mininet.topo import Topo
from mininet.net import Mininet
from mininet.node import CPULimitedHost
from mininet.link import TCLink
from mininet.util import dumpNodeConnections
from mininet.log import setLogLevel
import time
import subprocess

class SingleSwitchTopo(Topo):
    "Single switch connected to n hosts."
    def __init__(self, n=2, **opts):
        Topo.__init__(self, **opts)
        hosts=[]
        for h in range(n):
            # Each host gets 50%/n of system CPU
            hosts.append(self.addHost('h%s' % (h + 1),
               cpu=.5/n))
            # 10 Mbps, 5ms delay, 10% loss, 1000 packet queue
        self.addLink(hosts[0], hosts[1],
            bw=10, delay='5ms', loss=0, max_queue_size=1000, use_htb=True)

def perfTest():
    "Create network and run simple performance test"
    topo = SingleSwitchTopo(n=2)
    net = Mininet(topo=topo, 
                  host=CPULimitedHost, link=TCLink)
    net.start()
    h1, h2 = net.get('h1', 'h2')
 
    h1_dmp = h1.popen('tcpdump', '-x', '-tt', '-nn', '-Z', 'root', '-B', '1000', '-w', 'dump/sender.pcap')
    h2_dmp = h2.popen('tcpdump', '-x', '-tt', '-nn', '-Z', 'root', '-B', '1000', '-w', 'dump/receiver.pcap')

    h1_pid = h1.popen('iperf', '-s', '-p', '5001')
    h2_pid = h2.popen(['iperf', '-c', h1.IP(), '-p', '5001', '-t', '30','-Z', 'cubic'],stdout=subprocess.PIPE,stderr = subprocess.STDOUT)
    
    time.sleep(30)

    h1_pid.kill()
    h1_dmp.kill()
    h2_pid.kill()
    h2_dmp.kill()
    net.stop()

if __name__ == '__main__':
    setLogLevel('info')
    perfTest()
```
#出力結果
```ここに言語を入力
*** Creating network
*** Adding controller
*** Adding hosts:
h1 h2 
*** Adding switches:

*** Adding links:
(10.00Mbit 5ms delay 0.00000% loss) (10.00Mbit 5ms delay 0.00000% loss) (h1, h2) 
*** Configuring hosts
h1 (cfs 75000/100000us) h2 (cfs 75000/100000us) 
*** Starting controller
c0 
*** Starting 0 switches

*** Stopping 1 controllers
c0 
*** Stopping 1 links
.
*** Stopping 0 switches

*** Stopping 2 hosts
h1 h2 
*** Done

```

Mininetで実行したiperfの出力をコマンドプロンプト上に表示させたい

こんにちは、GNS3を使って構築したネットワークについて質問です。
現在勉強のため、以下のようなネットワークを構築しました。
ESW1とECW2はCisco3725にNM-16ESWを入れてL3スイッチ化したものです。
ESW1とESW2はEtherChannelで二つの物理ポートを束ねたtrunkポートで繋いでいます。
trunkポートではVLAN10とVLAN20の通信を許可しています。
CentOSマシン間でのping疎通はすべて成功しています。

![イメージ説明](1e5245c7f8be15344469b5259bf6294d.png)

しかし、CentOS7-1からCentOS7-3にPingを送信すると、
Duplicate Replyになってしまいます。

通信内容を確認すると、Pingリクエストが
・CentOS7-1 → ESW1 → CentOS7-3
の経路で届いているものと、
・CentOS7-1 → ESW1 → ESW2 → ESW1 → CentOS7-3
という経路で届いているものの二つがあり、
結果としてPingが二つReplyされている状況のようです。

このとき、ESW1かESW2で通信の重複を抑える方法が知りたいのですが、
調べてもいまいちやり方がわかりません。
ご存知の方おられましたらご回答お願いいたします。

＝＝＝＝＝＝＝＝＝
ご回答に対して
少し長くなりますが、、ESW1とESW2のshow run結果について添付します、


```ここに言語を入力
#############ESW1###############
!
!
!
!

!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
no service dhcp
!
hostname ESW1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
macro name add_vlan
end
vlan database
vlan $v
exit
@
macro name del_vlan
end
vlan database
no vlan $v
exit
@
!
vtp file nvram:vlan.dat
archive
 log config
  hidekeys
! 
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface Port-channel1
 switchport trunk allowed vlan 1,10,20,1002-1005
 switchport mode trunk
!
interface FastEthernet0/0
 description *** Unused for Layer2 EtherSwitch ***
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/1
 description *** Unused for Layer2 EtherSwitch ***
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet1/0
 switchport access vlan 10
 duplex full
 speed 100
!
interface FastEthernet1/1
 switchport access vlan 20
 duplex full
 speed 100
!
interface FastEthernet1/2
 duplex full
 speed 100
!
interface FastEthernet1/3
 duplex full
 speed 100
!
interface FastEthernet1/4
 duplex full
 speed 100
!
interface FastEthernet1/5
 duplex full
 speed 100
!
interface FastEthernet1/6
 duplex full
 speed 100
!
interface FastEthernet1/7
 duplex full
 speed 100
!
interface FastEthernet1/8
 duplex full
 speed 100
!
interface FastEthernet1/9
 duplex full
 speed 100
!
interface FastEthernet1/10
 duplex full
 speed 100
!
interface FastEthernet1/11
 duplex full
 speed 100
!
interface FastEthernet1/12
 duplex full
 speed 100
!
interface FastEthernet1/13
 switchport trunk allowed vlan 1,10,20,1002-1005
 switchport mode trunk
 channel-group 1 mode on
!
interface FastEthernet1/14
 switchport trunk allowed vlan 1,10,20,1002-1005
 switchport mode trunk
 channel-group 1 mode on
!
interface FastEthernet1/15
 description ### administration ###
 switchport access vlan 2
 duplex full
 speed 100
!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan2
 description ### administration ###
 ip address 192.168.11.51 255.255.255.0
!
interface Vlan10
 description ### test vlan #1 ###
 ip address 192.168.100.1 255.255.255.0
!
interface Vlan20
 description ### test vlan #2 ###
 ip address 192.168.101.1 255.255.255.0
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 192.168.51.1
ip route 0.0.0.0 0.0.0.0 192.168.11.1
ip route 0.0.0.0 0.0.0.0 192.168.11.2
!
!
no ip http server
no ip http secure-server
!
no cdp log mismatch duplex
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
banner exec 

***************************************************************
This is a normal Router with a Switch module inside (NM-16ESW)
It has been pre-configured with hard-coded speed and duplex

To create vlans use the command "vlan database" in exec mode
After creating all desired vlans use "exit" to apply the config

To view existing vlans use the command "show vlan-switch brief"

Alias(exec)     : vl   - "show vlan-switch brief" command
Alias(configure): va X - macro to add vlan X
Alias(configure): vd X - macro to delete vlan X
***************************************************************


alias configure va macro global trace add_vlan $v
alias configure vd macro global trace del_vlan $v
alias exec vl show vlan-switch brief
!
line con 0
 exec-timeout 0 0
 privilege level 15
 password *****
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 password ******
 login
!
!
end

```

```ここに言語を入力
###########ESW2##############
!
!
!

!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
no service dhcp
!
hostname ESW2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
macro name add_vlan
end
vlan database
vlan $v
exit
@
macro name del_vlan
end
vlan database
no vlan $v
exit
@
!
vtp file nvram:vlan.dat
archive
 log config
  hidekeys
! 
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface Port-channel1
 switchport trunk allowed vlan 1,10,20,1002-1005
 switchport mode trunk
!
interface FastEthernet0/0
 description *** Unused for Layer2 EtherSwitch ***
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/1
 description *** Unused for Layer2 EtherSwitch ***
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet1/0
 switchport access vlan 10
 duplex full
 speed 100
!
interface FastEthernet1/1
 duplex full
 speed 100
!
interface FastEthernet1/2
 duplex full
 speed 100
!
interface FastEthernet1/3
 duplex full
 speed 100
!
interface FastEthernet1/4
 duplex full
 speed 100
!
interface FastEthernet1/5
 duplex full
 speed 100
!
interface FastEthernet1/6
 duplex full
 speed 100
!
interface FastEthernet1/7
 duplex full
 speed 100
!
interface FastEthernet1/8
 duplex full
 speed 100
!
interface FastEthernet1/9
 duplex full
 speed 100
!
interface FastEthernet1/10
 duplex full
 speed 100
!
interface FastEthernet1/11
 duplex full
 speed 100
!
interface FastEthernet1/12
 duplex full
 speed 100
!
interface FastEthernet1/13
 switchport trunk allowed vlan 1,10,20,1002-1005
 switchport mode trunk
 channel-group 1 mode on
!
interface FastEthernet1/14
 switchport trunk allowed vlan 1,10,20,1002-1005
 switchport mode trunk
 channel-group 1 mode on
!
interface FastEthernet1/15
 description ### administration ###
 switchport access vlan 2
 duplex full
 speed 100
!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan2
 description ### administration ###
 ip address 192.168.11.52 255.255.255.0
!
interface Vlan10
 description ### test vlan #1 ###
 ip address 192.168.100.11 255.255.255.0
!
interface Vlan20
 description ### test vlan #2 ###
 ip address 192.168.101.11 255.255.255.0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
no cdp log mismatch duplex
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
banner exec 

***************************************************************
This is a normal Router with a Switch module inside (NM-16ESW)
It has been pre-configured with hard-coded speed and duplex

To create vlans use the command "vlan database" in exec mode
After creating all desired vlans use "exit" to apply the config

To view existing vlans use the command "show vlan-switch brief"

Alias(exec)     : vl   - "show vlan-switch brief" command
Alias(configure): va X - macro to add vlan X
Alias(configure): vd X - macro to delete vlan X
***************************************************************


alias configure va macro global trace add_vlan $v
alias configure vd macro global trace del_vlan $v
alias exec vl show vlan-switch brief
!
line con 0
 exec-timeout 0 0
 privilege level 15
 password ******
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 password *******
 login
!
!
end

```

ciscoのvlan間pingでのパケット重複の解消

#やりたいこと
Mininetを使用し、ダンベルトポロジーを構築する。

#困っていること
Pythonでトポロジーを構築するコードを書きました。そこで、pingallを実行したところpingが通りませんでした。
私が書いたコードを以下に示します。

また,pingallの結果をコードの以下に示します。
結果よりSwitch間では、pingが通るのですが、host間でpingが通っていません。

pingが通らない原因と解消方法を教えてください。
よろしくお願いします。
```python
#!/usr/bin/python

from mininet.topo import Topo
from mininet.net import Mininet
from mininet.node import CPULimitedHost,OVSController
from mininet.link import TCLink
from mininet.util import dumpNodeConnections
from mininet.log import setLogLevel
from mininet.cli import CLI

import time
import subprocess
import sys
import threading
import csv
from argparse import ArgumentParser

from time import sleep, time
import re

pid = None

def get_option():
    parser = ArgumentParser(description='explanation of program')

    parser.add_argument('-c', '--cc', help="name of cc schemes", type=str, default='none')

    return parser.parse_args()



class SingleSwitchTopo(Topo):
    "Single switch connected to n hosts."
    def __init__(self, n=2, **opts):
        Topo.__init__(self, **opts)
        hosts=[]
        switchs=[]    

        for s in range(2):
            switchs.append(self.addHost('s%s' % (s + 1)))
        # self.addLink(switchs[0], switchs[1], intfName1='s1-eth0', intfName2='s2-eth0',
        # bw=100, delay='5ms', loss=0,max_queue_size=79,use_tbf=True)
        self.addLink(switchs[0], switchs[1],
        bw=100, delay='5ms', loss=0,max_queue_size=79,use_tbf=True)

        for h in range(n):
            print(h)
            # Each host gets 50%/n of system CPU
            hosts.append(self.addHost('h%s' % (2*h+1)))
            hosts.append(self.addHost('h%s' % (2*(h + 1))))
            # 10 Mbps, 5ms delay, 10% loss, 1000 packet queue
            
            # self.addLink(hosts[2*(h)], switchs[0], intfName1='h'+str(2*(h)+1)+'-eth0', intfName2='s1-eth'+str(h+1),
            #     bw=100, delay='5ms', loss=0,max_queue_size=1000,use_tbf=True)
            
            # self.addLink(hosts[2*(h)+1], switchs[1], intfName1='h'+str(2*(h+1))+'-eth0', intfName2='s2-eth'+str(h+1),
            #     bw=100, delay='5ms', loss=0,max_queue_size=1000,use_tbf=True)
            self.addLink(hosts[2*(h)], switchs[0],
                bw=100, delay='5ms', loss=0,max_queue_size=1000,use_tbf=True)
            
            self.addLink(hosts[2*(h)+1], switchs[1], 
                bw=100, delay='5ms', loss=0,max_queue_size=1000,use_tbf=True)
            

        


def perfTest(cc):
    global pid
    "Create network and run simple performance test"
    topo = SingleSwitchTopo(n=2)
    net = Mininet(topo=topo, 
                  link=TCLink,controller=None)
    h1, h2 ,s1 ,s2= net.get('h1', 'h2', 's1', 's2')

    #h1_tx = h1.cmd('ip l set dev h1-eth0 txqueue 1' )
    #h2_tx = h2.cmd('ip l set dev h2-eth0 txqueue 1' )

    net.start() 
    net.pingAll()   
    CLI(net)
    h1_eth = h1.cmd('ethtool -K h1-eth0 tx off sg off tso off ufo off' )
    h2_eth = h2.cmd('ethtool -K h2-eth0 tx off sg off tso off ufo off' )
 
    thread2 = threading.Thread(target=monitor_qlen, args=(h2,))
    thread2.setDaemon(True)
    thread2.start()
    dumpNodeConnections(net.hosts)

    # h1_dmp = h1.popen('tcpdump', '-x', '-tt', '-nn', '-Z', 'root', '-B', '1000', '-w', 'dump/sender.pcap')
    # h2_dmp = h2.popen('tcpdump', '-x', '-tt', '-nn', '-Z', 'root', '-B', '1000', '-w', 'dump/receiver.pcap')
    print(s1.IP(),s2.IP())

    h2_pid = h2.popen('iperf', '-s', '-p', '10001')
    h1_pid = h1.popen(['iperf', '-c', h2.IP(), '-p', '10001', '-t', '60','-i', '1','-Z', cc],stdout=subprocess.PIPE,stderr = subprocess.STDOUT)
    #net.iperf((h1,h2))
    try:
        for line in iter(h1_pid.stdout.readline, b''):
            print(line.rstrip().decode('utf8'))
            sys.stdout.flush()
    
    finally:

        h1_pid.kill()
        h2_pid.kill()
        # h1_dmp.kill()
        # h2_dmp.kill()
        net.stop()

    

if __name__ == '__main__':

    args = get_option()
    setLogLevel('info')

    perfTest(args.cc)
    sys.exit()

```

```ここに言語を入力
*** Ping: testing ping reachability
h1 -> X X X X X 
h2 -> X X X X X 
h3 -> X X X X X 
h4 -> X X X X X 
s1 -> X X X X s2 
s2 -> X X X X s1 
*** Results: 93% dropped (2/30 received)

```

Mininetで構築したネットワークでpingが通らない

# 概要
　ns3を用いて、Wi-Fiのスループットを測定したいのですがコンパイルをするとエラーが起きてしまいます。どのように修正すればいいのかを教えていただきたいです。 __UdpClientHelper__のところでエラーが起きてるのかなというのは予想しているのですが、なぜエラー原因と解決策がわからないです。

##　エラー文
```ここに言語を入力
<nr>hogehoge:ns-3-dev$ ./waf --run 'scratch/teratail'
Waf: Entering directory `/Users/hogehoge/Desktop/ns-allinone-3.30.1/ns-3-dev/build'
[2800/2849] Compiling scratch/teratail.cc
[2809/2849] Linking build/scratch/teratail
Waf: Leaving directory `/Users/hogehoge/Desktop/ns-allinone-3.30.1/ns-3-dev/build'
Build commands will be stored in build/compile_commands.json
'build' finished successfully (3.256s)
assert failed. cond="duration.IsPositive ()", msg="Please provide test case to maintainers if this assert is hit.", file=../src/wifi/model/mac-low.cc, line=2146
libc++abi.dylib: terminating
Command ['/Users/hogehoge/Desktop/ns-allinone-3.30.1/ns-3-dev/build/scratch/teratail'] terminated with signal SIGIOT. Run it under a debugger to get more information (./waf --run <program> --command-template="gdb --args %s <args>").
```

##　ネットワークトポロジー図
![イメージ説明](389b2c9988e4e5d5614fd4095de88131.png)

## プログラム説明
　50m×50mのエリアに10個の端末をランダムで配置し、中央にAPを設置する。APはRemoteHostと接続されており、端末はRemoteHostと通信を行う。その際のスループットを表示する。

## プログラムコード
```C++
#include "ns3/core-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/command-line.h"
#include "ns3/config.h"
#include "ns3/uinteger.h"
#include "ns3/boolean.h"
#include "ns3/double.h"
#include "ns3/string.h"
#include "ns3/yans-wifi-helper.h"
#include "ns3/ssid.h"
#include "ns3/mobility-helper.h"
#include "ns3/mobility-module.h"
#include "ns3/internet-stack-helper.h"
#include "ns3/ipv4-address-helper.h"
#include "ns3/udp-client-server-helper.h"
#include "ns3/packet-sink-helper.h"
#include "ns3/on-off-helper.h"
#include "ns3/ipv4-global-routing-helper.h"
#include "ns3/packet-sink.h"
#include "ns3/yans-wifi-channel.h"
#include <array>

using namespace ns3;

int main (int argc, char *argv[])
{
    uint32_t nStaNodes = 10;
    double simulationTime = 5;

    CommandLine cmd;
    cmd.AddValue ("nStaNodes", "Number of \"extra\" Station nodes/devices", nStaNodes);
    cmd.AddValue ("simulationTime", "Simulation time per step (in seconds)", simulationTime);

    cmd.Parse (argc,argv);

    std::string phyRate = "HtMcs15";                    /* Physical layer bitrate. */

    uint32_t payloadSize = 1472; //bytes

    NodeContainer p2pNodes;
    p2pNodes.Create (2);

    NodeContainer remoteNode;
    remoteNode.Add (p2pNodes.Get (1));

    PointToPointHelper pointToPoint;
    pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("130Mbps"));
    pointToPoint.SetChannelAttribute ("Delay", StringValue ("1ms"));

    NetDeviceContainer p2pDevices;
    p2pDevices = pointToPoint.Install (p2pNodes);

    NodeContainer wifiStaNodes;
    wifiStaNodes.Create (nStaNodes);
    NodeContainer wifiApNode = p2pNodes.Get (0);

    YansWifiChannelHelper channel = YansWifiChannelHelper::Default ();
    YansWifiPhyHelper phy = YansWifiPhyHelper::Default ();
    phy.SetChannel (channel.Create ());

    WifiHelper wifi;
    wifi.SetStandard (WIFI_PHY_STANDARD_80211n_2_4GHZ);
    Config::SetDefault ("ns3::LogDistancePropagationLossModel::ReferenceLoss", DoubleValue (40.046));

    StringValue ctrlRate;
    ctrlRate = StringValue ("ErpOfdmRate24Mbps");

    wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager",
                                "DataMode", StringValue (phyRate),
                                "ControlMode", ctrlRate);

    WifiMacHelper mac;
    Ssid ssid = Ssid ("ns3-80211n");
    mac.SetType ("ns3::StaWifiMac",
                "Ssid", SsidValue (ssid));
    NetDeviceContainer staDevices;
    staDevices = wifi.Install (phy, mac, wifiStaNodes);
    mac.SetType ("ns3::ApWifiMac",
                "Ssid", SsidValue (ssid));
    NetDeviceContainer apDevice;
    apDevice = wifi.Install (phy, mac, wifiApNode);

    // mobility.
    MobilityHelper mobility;
    Ptr<ListPositionAllocator> positionAlloc = CreateObject<ListPositionAllocator> ();
    positionAlloc->Add (Vector (25.0, 25.0, 0.0));
    double xPositionArray[nStaNodes];
    double yPositionArray[nStaNodes];
    for (uint32_t nodeCount = 0; nodeCount < nStaNodes; nodeCount++) //distance
    {
        xPositionArray[nodeCount] = rand() % 50;
        yPositionArray[nodeCount] = rand() % 50;
        positionAlloc->Add (Vector (xPositionArray[nodeCount], yPositionArray[nodeCount], 0.0));
    }

    mobility.SetPositionAllocator (positionAlloc);   
    mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
    mobility.Install (wifiApNode);
    mobility.Install (wifiStaNodes);

    /* Internet stack*/
    InternetStackHelper stack;
    stack.Install (remoteNode);
    stack.Install (wifiApNode);
    stack.Install (wifiStaNodes);

    Ipv4AddressHelper address;

    address.SetBase ("10.1.1.0", "255.255.255.0");
    Ipv4InterfaceContainer p2pInterfaces;
    p2pInterfaces = address.Assign (p2pDevices);

    address.SetBase ("10.1.2.0", "255.255.255.0");
    Ipv4InterfaceContainer staNodesInterface;
    Ipv4InterfaceContainer apNodeInterface;
    staNodesInterface = address.Assign (staDevices);
    apNodeInterface = address.Assign (apDevice);

    ApplicationContainer serverApp;
    //UDP flow
    uint16_t port = 9;
    UdpServerHelper server (port);
    serverApp = server.Install (wifiStaNodes);
    serverApp.Start (Seconds (0.0));
    serverApp.Stop (Seconds (simulationTime + 1));

    ApplicationContainer clientApp;

    for (int i = 0; i < nStaNodes; i++) {
        UdpClientHelper client (staNodesInterface.GetAddress (i), port);
        client.SetAttribute ("MaxPackets", UintegerValue (4294967295u));
        client.SetAttribute ("Interval", TimeValue (Time ("0.00001"))); //packets/s
        client.SetAttribute ("PacketSize", UintegerValue (payloadSize));

        if (i == 0) {
            clientApp = client.Install (wifiApNode.Get (0));
        }
        else {
            clientApp.Add(client.Install (wifiApNode.Get (0)));
        }
    }

    clientApp.Start (Seconds (1.0));
    clientApp.Stop (Seconds (simulationTime + 1));

    Ipv4GlobalRoutingHelper::PopulateRoutingTables ();   
    Simulator::Stop (Seconds (simulationTime + 1));

    Simulator::Run ();
    double throughput = 0;
    //UDP
    uint64_t totalPacketsThrough = DynamicCast<UdpServer> (serverApp.Get (0))->GetReceived ();
    throughput = totalPacketsThrough * payloadSize * 8 / (simulationTime * 1000000.0); //Mbit/s
    std::cout << throughput << " Mbit/s" << std::endl;
    Simulator::Destroy ();

    return 0;
}
```

ns3で1つのWi-Fi (AP)に複数の端末 (station) を接続してスループットを測定したい

# やりたいこと
ネットワークエミュレータのMininetを使用して、ネットワークを構築し輻輳制御手法を指定してiperfを実行したい。
また、ネットワークの構築やフローの実行はPython上で行いたいと考えています。

ネットワークの構築は以下のサイトを参考に行いました。
http://www.cloudcluster.cloudysunny14.org/show_materials?id=ahBzfm9uY2xvdWRjbHVzdGVyciYLEg9NYXRlcmlhbHNUaGVtZXMY0YwBDAsSCE1lbnRpb25zGOkHDA

下記のコードで、ホストh1とホストh2間でiperfを使用し通信を行いたいです。
そこで、通信を行う際の輻輳制御手法を指定していする方法を教えてください。
有識者の方々、ご助力の程よろしくお願いします。


# コード
現在のコードは以下の通りです。
```python
#!/usr/bin/python

from mininet.topo import Topo
from mininet.net import Mininet
from mininet.node import CPULimitedHost
from mininet.link import TCLink
from mininet.util import dumpNodeConnections
from mininet.log import setLogLevel

class SingleSwitchTopo(Topo):
    "Single switch connected to n hosts."
    def __init__(self, n=2, **opts):
        Topo.__init__(self, **opts)
        switch = self.addSwitch('s1')
        for h in range(n):
            # Each host gets 50%/n of system CPU
            host = self.addHost('h%s' % (h + 1),
               cpu=.5/n)
            # 10 Mbps, 5ms delay, 10% loss, 1000 packet queue
            self.addLink(host, switch,
               bw=10, delay='5ms', loss=0, max_queue_size=1000, use_htb=True)

def perfTest():
    "Create network and run simple performance test"
    topo = SingleSwitchTopo(n=2)
    net = Mininet(topo=topo, 
                  host=CPULimitedHost, link=TCLink)
    net.start()
    print "Dumping host connections"
    dumpNodeConnections(net.hosts)
    print "Testing network connectivity"
    net.pingAll()
    print "Testing bandwidth between h1 and h4"
    h1, h2 = net.get('h1', 'h2')
    net.iperf((h1, h2))
    net.stop()

if __name__ == '__main__':
    setLogLevel('info')
    perfTest()
```

Mininetのiperfで輻輳制御手法を指定する方法を知りたい

プログラミングとは全く関係ない質問で申し訳ないです。
cisco meraki mrの42か45の購入を検討しています。
理由は、自宅のWiFiの調子が悪いからです。
WiFiが繋がるときは、繋がるんですが、繋がらないときは、全くインターネットに接続できません。
meraki mr 42か45を使ったことがある方どなたか、詳しい方使ってみた感想を教えて頂けるとありがたいです。

他にWiFiの機械でこのようなものがいいというのがあれば教えて頂けるとありがたいです。
よろしくお願い致します。

Network Simulator