** Changed in: neutron
Status: New => Opinion
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https://bugs.launchpad.net/bugs/1540064
Title:
neutron router-update --routes should prevent user from adding
existing cidr
Status in neutron:
Opinion
Bug description:
Find this when do some debug.
Steps to reproduce:
1) I have a router with some subnets connected to it, for example
100.0.0.0/24 100.0.1.0/24. There will be some routes that are created by the
kernel for the router interfaces.
# ip r
100.0.1.0/24 dev qr-fef63af2-82 proto kernel scope link src 100.0.1.1
100.0.0.0/24 dev qr-af2ae2b0-8c proto kernel scope link src 100.0.0.1
2) I update the extra route by (just for testing)
neutron router-update router1 --route
destination=100.0.1.0/24,nexthop=100.0.0.3
3) The route that was for 100.0.1.0/24 will be replaced.
# ip r
100.0.1.0/24 via 100.0.0.3 dev qr-af2ae2b0-8c
100.0.0.0/24 dev qr-af2ae2b0-8c proto kernel scope link src 100.0.0.1
4) I clear the extra route that I added by using
neutron router-update router1 --no-routes
The I get the following routes in router namespace:
# ip r
100.0.0.0/24 dev qr-af2ae2b0-8c proto kernel scope link src 100.0.0.1
As a result, I lost the connection to 100.0.1.0/24.
I think neutron should prevent user from adding extra routes to the existing
cidrs that have been connected to router(as interface or as gateway).
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