From: David Ahern <d...@cumulusnetworks.com>
Date: Tue, 8 Dec 2015 12:48:05 -0800
> VRFs require ip rules for route lookups to work properly. Currently
> creating a VRF means instantiating a device and then adding the 4 ip
> and ip6 rules:
>
> ip link add vrf-${VRF} type vrf table ${TBID}
> ip ru add oif vrf-${VRF} table ${TBID}
> ip ru add iif vrf-${VRF} table ${TBID}
> ip -6 ru add oif vrf-${VRF} table $TBID
> ip -6 ru add iif vrf-${VRF} table $TBID
>
> Since the table is required when the vrf device is created the rules can
> be inserted automatically lightening the overhead and improving the
> user experience (only the ip link add is needed).
>
> Signed-off-by: David Ahern <d...@cumulusnetworks.com>
> ---
> v2
> - addressed comments from Nik
Unfortunately it's too late for this, you should have considered this
issue fully when VRF first went into an upstream release.
If I add your change, the user experience is _worse_.
Users on older kernels have to use the full sequence, then if they
upgrade their kernels to one with this patch then the 'ru add' et
al. commands will fail.
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