Exception: Error creating interface pair (s2-eth5,s3-eth1): RTNETLINK answers: File exists #737

AlPazinou · 2017-04-28T12:30:41Z

Hi,
I'm using mininet I created a topology using miniedit and generated a script (minitopo.py)
and i'm getting this error when executing the script

Traceback (most recent call last):
  File "minitopo1.py", line 70, in <module>
    myNetwork()
  File "minitopo1.py", line 49, in myNetwork
    net.addLink(s2, s3)
  File "/home/mininet/mininet/mininet/net.py", line 364, in addLink
    link = cls( node1, node2, **options )
  File "/home/mininet/mininet/mininet/link.py", line 424, in __init__
    node1, node2, deleteIntfs=False )
  File "/home/mininet/mininet/mininet/link.py", line 468, in makeIntfPair
    deleteIntfs=deleteIntfs )
  File "/home/mininet/mininet/mininet/util.py", line 194, in makeIntfPair
    ( intf1, intf2, cmdOutput ) )
Exception: Error creating interface pair (s2-eth5,s3-eth1): RTNETLINK answers: File exists

I've tried to use it without the remote controller, and had the same problem , there's something wrong in creating the links between (s2,s3) and (s4,s3)

here's the script (minitopo.py) ,

#!/usr/bin/python

from mininet.net import Mininet
from mininet.node import Controller, RemoteController, OVSController
from mininet.node import CPULimitedHost, Host, Node
from mininet.node import OVSKernelSwitch, UserSwitch
from mininet.node import IVSSwitch
from mininet.cli import CLI
from mininet.log import setLogLevel, info
from mininet.link import TCLink, Intf
from subprocess import call

def myNetwork():

    net = Mininet( topo=None,
                   build=False,
                   ipBase='10.0.0.0/8')

    info( '*** Adding controller\n' )
    c1=net.addController(name='c1',
                      controller=Controller,
                      protocol='tcp',
                      port=6633)

    info( '*** Add switches\n')
    s2 = net.addSwitch('s2', cls=OVSKernelSwitch)
    s4 = net.addSwitch('s4', cls=OVSKernelSwitch)
    s3 = net.addSwitch('s3', cls=OVSKernelSwitch)

    info( '*** Add hosts\n')
    h7 = net.addHost('h7', cls=Host, ip='10.0.0.7', defaultRoute=None)
    h2 = net.addHost('h2', cls=Host, ip='10.0.0.2', defaultRoute=None)
    h3 = net.addHost('h3', cls=Host, ip='10.0.0.3', defaultRoute=None)
    h4 = net.addHost('h4', cls=Host, ip='10.0.0.4', defaultRoute=None)
    h6 = net.addHost('h6', cls=Host, ip='10.0.0.6', defaultRoute=None)
    h5 = net.addHost('h5', cls=Host, ip='10.0.0.5', defaultRoute=None)
    h8 = net.addHost('h8', cls=Host, ip='10.0.0.8', defaultRoute=None)
    h1 = net.addHost('h1', cls=Host, ip='10.0.0.1', defaultRoute=None)

    info( '*** Add links\n')
    net.addLink(s2, h4)
    net.addLink(s2, h3)
    net.addLink(s2, h2)
    net.addLink(s2, h1)
    net.addLink(s4, h5)
    net.addLink(s4, h6)
    net.addLink(s4, h7)
    net.addLink(s4, h8)
    net.addLink(s2, s3)
    net.addLink(s3, s4)

    info( '*** Starting network\n')
    net.build()
    info( '*** Starting controllers\n')
    for controller in net.controllers:
        controller.start()

    info( '*** Starting switches\n')
    net.get('s2').start([])
    net.get('s4').start([])
    net.get('s3').start([c1])

    info( '*** Post configure switches and hosts\n')

    CLI(net)
    net.stop()

if __name__ == '__main__':
    setLogLevel( 'info' )
    myNetwork()

could you please telle me what's wrong ?

The text was updated successfully, but these errors were encountered:

hwchiu · 2017-04-28T14:09:27Z

Can you use "sudo mn -c" to clean your env and try again ?

AlPazinou · 2017-04-28T15:55:06Z

I already tried it , and same error occured 2017-04-28 15:09 GMT+01:00 Hung-Wei Chiu <notifications@github.com>:

…

Can you use "sudo mn -c" to clean your env and try again ? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#737 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/Aa15NH4PSLcJHwg7b1dcKi2o2gszPGXBks5r0fMegaJpZM4NLbQx> .

-- Abed Benamar , Master 2 ReSM , Univ 1 Oran

AlPazinou · 2017-04-29T10:54:26Z

Hi , I'm trying to use this topology in mininet [image: Images intégrées 1] I tried to do ( h1 ping h2 ) and it didn't work , altought they are in the same network all hosts are in the same 10.0.0.0/8 network I've also tried (pingall) and had this result : [image: image] <https://cloud.githubusercontent.com/assets/28145972/25554858/ab1750d6-2cd8-11e7-9761-4e839ac89167.png> what could be wrong in the topology script ?

…

-- Abed Benamar , Master 2 ReSM , Univ 1 Oran

AlPazinou · 2017-04-29T11:14:27Z

Hi, Try connecting the controller to the switches S2 and S4 as well. It should solve your problem! Regards, Chetan

…

On Sat, Apr 29, 2017 at 4:24 PM, Al PaZinoù ***@***.***> wrote: Hi , I'm trying to use this topology in mininet [image: Images intégrées 1] I tried to do ( h1 ping h2 ) and it didn't work , altought they are in the same network all hosts are in the same 10.0.0.0/8 network I've also tried (pingall) and had this result : [image: image] <https://cloud.githubusercontent.com/assets/28145972/25554858/ab1750d6-2cd8-11e7-9761-4e839ac89167.png> what could be wrong in the topology script ? -- Abed Benamar , Master 2 ReSM , Univ 1 Oran -- Documentation and tutorials: https://floodlight.atlassian. net/wiki/display/floodlightcontroller/Floodlight+Documentation Posting guidelines: https://floodlight.atlassian.net/wiki/pages/viewpage. action?pageId=24805428 --- You received this message because you are subscribed to the Google Groups "Floodlight-developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to ***@***.*** To post to this group, send email to ***@***.*** Visit this group at https://groups.google.com/a/openflowhub.org/group/ floodlight-dev/. To view this discussion on the web visit https://groups.google.com/a/ openflowhub.org/d/msgid/floodlight-dev/CAM93K9%3DTa_ SOhmib2_4uM4aZPWP7CeBZR-hK9-XnCAn%3D5TVYkA%40mail.gmail.com <https://groups.google.com/a/openflowhub.org/d/msgid/floodlight-dev/CAM93K9%3DTa_SOhmib2_4uM4aZPWP7CeBZR-hK9-XnCAn%3D5TVYkA%40mail.gmail.com?utm_medium=email&utm_source=footer> .

lantz · 2017-05-30T22:38:55Z

Not a Mininet error, as noted above.

mishi-a · 2018-03-21T05:04:04Z

Remove the Previous topology by using sudo mn -c

hahazyb201 · 2018-04-23T17:56:48Z

The solution by Ayush-IITP above works.

moeinarab · 2019-07-13T17:24:53Z

Can you use "sudo mn -c" to clean your env and try again ?

This command worked for me.

Haritha2298 · 2019-11-25T17:47:54Z

when i execute the make command to compile the source_routing. p4 file, it says the following

mkdir -p build pcaps logs
p4c-bm2-ss --p4v 16 --p4runtime-files build/source_routing.p4.p4info.txt -o build/source_routing.json source_routing.p4
sudo python ../utils/run_exercise.py -t topology.json -j build/source_routing.json -b simple_switch_grpc
Reading topology file.
Building mininet topology.
Traceback (most recent call last):
File "../utils/run_exercise.py", line 397, in
exercise.run_exercise()
File "../utils/run_exercise.py", line 202, in run_exercise
self.create_network()
File "../utils/run_exercise.py", line 267, in create_network
controller=None)
File "build/bdist.linux-x86_64/egg/mininet/net.py", line 174, in init
File "build/bdist.linux-x86_64/egg/mininet/net.py", line 502, in build
File "build/bdist.linux-x86_64/egg/mininet/net.py", line 489, in buildFromTopo
File "build/bdist.linux-x86_64/egg/mininet/net.py", line 400, in addLink
File "build/bdist.linux-x86_64/egg/mininet/link.py", line 557, in init
File "build/bdist.linux-x86_64/egg/mininet/link.py", line 451, in init
File "build/bdist.linux-x86_64/egg/mininet/link.py", line 496, in makeIntfPair
File "build/bdist.linux-x86_64/egg/mininet/util.py", line 267, in makeIntfPair
Exception: Error creating interface pair (s1-eth2,s2-eth2): RTNETLINK answers: File exists

../utils/Makefile:35: recipe for target 'run' failed
make: *** [run] Error 1

Could someone please tell how to resolve it?

Jhemme1991 · 2020-01-02T16:33:42Z

Hola buenas, alguien puede ayudarme en otro error ?

LukasChenChen · 2020-08-27T17:07:48Z

when i execute the make command to compile the source_routing. p4 file, it says the following

mkdir -p build pcaps logs
p4c-bm2-ss --p4v 16 --p4runtime-files build/source_routing.p4.p4info.txt -o build/source_routing.json source_routing.p4
sudo python ../utils/run_exercise.py -t topology.json -j build/source_routing.json -b simple_switch_grpc
Reading topology file.
Building mininet topology.
Traceback (most recent call last):
File "../utils/run_exercise.py", line 397, in
exercise.run_exercise()
File "../utils/run_exercise.py", line 202, in run_exercise
self.create_network()
File "../utils/run_exercise.py", line 267, in create_network
controller=None)
File "build/bdist.linux-x86_64/egg/mininet/net.py", line 174, in init
File "build/bdist.linux-x86_64/egg/mininet/net.py", line 502, in build
File "build/bdist.linux-x86_64/egg/mininet/net.py", line 489, in buildFromTopo
File "build/bdist.linux-x86_64/egg/mininet/net.py", line 400, in addLink
File "build/bdist.linux-x86_64/egg/mininet/link.py", line 557, in init
File "build/bdist.linux-x86_64/egg/mininet/link.py", line 451, in init
File "build/bdist.linux-x86_64/egg/mininet/link.py", line 496, in makeIntfPair
File "build/bdist.linux-x86_64/egg/mininet/util.py", line 267, in makeIntfPair
Exception: Error creating interface pair (s1-eth2,s2-eth2): RTNETLINK answers: File exists

../utils/Makefile:35: recipe for target 'run' failed
make: *** [run] Error 1

Could someone please tell how to resolve it?

Did you solve this ?

RedhwanGhailan · 2021-04-11T09:56:11Z

As @hwchiu said if the issue related to the existing files then all what you need is to clean the old files that were generated since the last run. So the command <sudo mn -c> is enough!
But if the problem still up so you have to edit your file and make the required changes like, change the path of your output, ect.

For edit any file visit the links below:
https://github.com/RedhwanGhailan/HOW-TOs/blob/main/How%20to%20edit%20a%20file%20inside%20a%20mininet%20VM
https://www.youtube.com/watch?v=LzSOmqbBOa4&list=PLGBaJmn0Gd4e2sMdVQ3alC-wDDXZemDOc&index=1

lantz closed this as completed May 30, 2017

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Exception: Error creating interface pair (s2-eth5,s3-eth1): RTNETLINK answers: File exists #737

Exception: Error creating interface pair (s2-eth5,s3-eth1): RTNETLINK answers: File exists #737

AlPazinou commented Apr 28, 2017

hwchiu commented Apr 28, 2017

AlPazinou commented Apr 28, 2017 via email

AlPazinou commented Apr 29, 2017 via email

AlPazinou commented Apr 29, 2017 via email

lantz commented May 30, 2017

mishi-a commented Mar 21, 2018

hahazyb201 commented Apr 23, 2018

moeinarab commented Jul 13, 2019

Haritha2298 commented Nov 25, 2019

Jhemme1991 commented Jan 2, 2020

LukasChenChen commented Aug 27, 2020

RedhwanGhailan commented Apr 11, 2021 •

edited

Exception: Error creating interface pair (s2-eth5,s3-eth1): RTNETLINK answers: File exists #737

Exception: Error creating interface pair (s2-eth5,s3-eth1): RTNETLINK answers: File exists #737

Comments

AlPazinou commented Apr 28, 2017

hwchiu commented Apr 28, 2017

AlPazinou commented Apr 28, 2017 via email

AlPazinou commented Apr 29, 2017 via email

AlPazinou commented Apr 29, 2017 via email

lantz commented May 30, 2017

mishi-a commented Mar 21, 2018

hahazyb201 commented Apr 23, 2018

moeinarab commented Jul 13, 2019

Haritha2298 commented Nov 25, 2019

Jhemme1991 commented Jan 2, 2020

LukasChenChen commented Aug 27, 2020

RedhwanGhailan commented Apr 11, 2021 • edited

RedhwanGhailan commented Apr 11, 2021 •

edited