netdev - Re: iproute2 - modifying routes in place

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Date:   Mon, 14 May 2018 14:40:11 -0400
From:   Ryan Whelan <rcwhelan@...il.com>
To:     dsahern@...il.com
Cc:     netdev@...r.kernel.org
Subject: Re: iproute2 - modifying routes in place

Same behavior:


root@...elan-linux ~
# ip -6 route
::1 dev lo proto kernel metric 256 pref medium
fd9b:caee:ff93:ceef:3431:3831:3930:3031 dev internal0 proto kernel metric
256 pref medium
fd9b:caee:ff93:ceef:3431:3831:3930:3032 dev internal0 src
fd9b:caee:ff93:ceef:3431:3831:3930:3031 metric 1024 pref medium
fe80::/64 dev enp0s3 proto kernel metric 256 pref medium
fe80::/64 dev enp0s8 proto kernel metric 256 pref medium
fe80::/64 dev internal0 proto kernel metric 256 pref medium

root@...elan-linux ~
# ip -6 route change fd9b:caee:ff93:ceef:3431:3831:3930:3032 dev internal0
src fd9b:caee:ff93:ceef:3431:3831:3930:3031 metric 10
RTNETLINK answers: No such file or directory

root@...elan-linux ~
# ip -6 route replace fd9b:caee:ff93:ceef:3431:3831:3930:3032 dev internal0
src fd9b:caee:ff93:ceef:3431:3831:3930:3031 metric 10

root@...elan-linux ~
# ip -6 route
::1 dev lo proto kernel metric 256 pref medium
fd9b:caee:ff93:ceef:3431:3831:3930:3031 dev internal0 proto kernel metric
256 pref medium
fd9b:caee:ff93:ceef:3431:3831:3930:3032 dev internal0 src
fd9b:caee:ff93:ceef:3431:3831:3930:3031 metric 10 pref medium
fd9b:caee:ff93:ceef:3431:3831:3930:3032 dev internal0 src
fd9b:caee:ff93:ceef:3431:3831:3930:3031 metric 1024 pref medium
fe80::/64 dev enp0s3 proto kernel metric 256 pref medium
fe80::/64 dev enp0s8 proto kernel metric 256 pref medium
fe80::/64 dev internal0 proto kernel metric 256 pref medium

root@...elan-linux ~
# uname -a
Linux rwhelan-linux 4.17.0-rc3-ipv6-route-bugs+ #2 SMP Mon May 14 11:30:38
EDT 2018 x86_64 x86_64 x86_64 GNU/Linux
On Sat, May 12, 2018 at 1:01 PM David Ahern <dsahern@...il.com> wrote:

> On 5/11/18 4:42 AM, Ryan Whelan wrote:
> > `ip route` has 2 subcommands that don't seem to work as expected and i'm
> > not sure if its a bug, or if i'm misunderstanding the semantics.

> Can you try with ipv6/route-bugs branch in
> https://github.com/dsahern/linux