mininet + iproute2 5.1.0 error

petslack · 05-17-2019, 04:01 PM

It seems that mininet (I'm currently using 2.3.0d5) is not compatible with latest iproute2 version 5.1.0 and it gets the following error when trying to bring up a mininet network.

This is a simple interactive test as example:

Code:

# python
Python 2.7.16 (default, Apr  3 2019, 21:30:55)
[GCC 8.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 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
>>> net = Mininet( topo=None,
...                    build=False,
...                    ipBase='10.0.0.0/8')
>>>
>>> CORE1 = net.addSwitch('CORE1', cls=OVSKernelSwitch)
>>> SW2 = net.addSwitch('SW2', cls=OVSKernelSwitch)
>>> net.addLink(CORE1, SW2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.7/site-packages/mininet/net.py", line 400, in addLink
    link = cls( node1, node2, **options )
  File "/usr/lib64/python2.7/site-packages/mininet/link.py", line 451, in __init__
    node1, node2, deleteIntfs=False )
  File "/usr/lib64/python2.7/site-packages/mininet/link.py", line 496, in makeIntfPair
    deleteIntfs=deleteIntfs )
  File "/usr/lib64/python2.7/site-packages/mininet/util.py", line 234, in makeIntfPair
    ( intf1, intf2, cmdOutput ) )
Exception: Error creating interface pair (CORE1-eth1,SW2-eth1): RTNETLINK answers: No such device
RTNETLINK answers: No such device

>>> quit()

NOTE: It's working properly when downgrading to iproute2 5.0.0 and older.

Sfner · 06-16-2019, 11:33 PM

Quote:

Originally Posted by petslack

It seems that mininet (I'm currently using 2.3.0d5) is not compatible with latest iproute2 version 5.1.0 and it gets the following error when trying to bring up a mininet network.

Code:

Exception: Error creating interface pair (CORE1-eth1,SW2-eth1): RTNETLINK answers: No such device
RTNETLINK answers: No such device

NOTE: It's working properly when downgrading to iproute2 5.0.0 and older.

Thank you for the workaround.
I've opened an issue on their GitHub repository, as there wasn't one already.