[FROG] how to make FRR know about configured netns on a centos system?
equinox at diac24.net
Sat Oct 27 17:06:40 EDT 2018
depending on what you want to do, there are 2 different approaches to
network namespaces with FRR:
(a) using them to implement VRFs and have FRR be aware of them
(b) using them to implement virtual routers and run FRR inside of them
For a management interface separation -- where you don't need any
interaction between the management and routing netns -- I would suggest
you do (b).
Now, unfortunately the standard init scripts won't start FRR in a
network namespace for you. You'll have to wire that up for yourself.
But on the other hand, after that's done you just have a "normal" FRR
installation and don't need to deal with VRFs. If you want to run more
than one FRR "virtual router", you can use the `-N` option. In that
case each netns runs the full set of all daemons.
If you want to do (a), there is the `--vrfwnetns` option to pass to
zebra at startup, but I don't actually know the details on this since I
haven't run such a setup.
Lastly, if you want to use Linux kernel VRF support, that works by
creating "vrf" type devices inside the 1 network namespace.
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