Bug 783432

Summary:	sys-apps/systemd-248 network disappearing after changes to interfaces
Product:	Gentoo Linux	Reporter:	Jan Psota <jasiupsota>
Component:	Current packages	Assignee:	Gentoo systemd Team <systemd>
Status:	RESOLVED NEEDINFO
Severity:	normal	CC:	Adrian.Bassett
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Jan Psota 2021-04-17 13:14:09 UTC

(switching back to -247.2 solves all the problems)

I use Shorewall. On new systemd if I add any network interface (Tinc tap in my system) or switch network interface off (ip l s wan down), than up - _all_ the network disappears (I have lan and wan physical interfaces). Nothing changes in iptables nor "ip a" output but I cannot ping router connected directly to wan interface because of "Network unreachable"! (interfaces are still in UP state!)

# ip r a default via 192.168.1.1 dev wan
Error: Nexthop has invalid gateway

I have to stop shorewall (policies stay DROP), turn up iface, add route (it does not appear automatically on -248) then start shorewall and now all the interfaces work until I remove or add any of them.

It may cause serious problems when somebody will restart remote host after upgrade to systemd-248 and will face with same behaviour...

Comment 1 Mike Gilbert gentoo-dev

2021-04-17 17:39:02 UTC

Are you using systemd-networkd? If so, what does your configuration look like?

I don't know what "Tinc tap" means.

I don't use shorewall or iptables in general, so you'll have to provide very specific information for anything to happen with this bug report.

You might be better off working with shorewall/systemd upstream.