[systemd-devel] systemd-resolved floods the network with mDNS packets

Please help stop the mDNS flood. I have enabled MulticastDNS in one of my network files (see below). When I start the systemd-resolved service it consumes >90% CPU. Other machines on the network are being flooded by mDNS packets and their CPU also gets loaded. Capturing a trace with tcpdump sho

Re: [systemd-devel] Dynamic link-local address not assigned after collision

> -Original Message- > From: Andrei Borzenkov > Sent: Tuesday, 7 January 2025 4:53 PM > To: Muggeridge, Matt ; systemd- > de...@lists.freedesktop.org > Subject: Re: [systemd-devel] Dynamic link-local address not assigned after > collision > > 07.01.2025 06

[systemd-devel] Dynamic link-local address not assigned after collision

I have two systems where I need them to assign link-local addresses in a 169.254.4/24 subnet, regardless of any other addresses configured. I'm using a /24 subnet because I have multiple interfaces on the system that require link-local addresses; I was placing them in their own subnets. >From t

RE: networkd RetransmitSec - how to make it work on a host?

> -Original Message- > From: Lennart Poettering > Sent: Wednesday, December 13, 2023 7:32 AM > To: Muggeridge, Matt > Cc: systemd-devel@lists.freedesktop.org > Subject: Re: networkd RetransmitSec - how to make it work on a host? > > On Mo, 11.12.23 02:49, Muggeri

RE: IPv6 Compliance for networkd

> -Original Message- > From: Lennart Poettering > Sent: Wednesday, December 13, 2023 4:22 AM > To: Muggeridge, Matt > Cc: systemd-devel@lists.freedesktop.org > Subject: Re: IPv6 Compliance for networkd > > On Mo, 11.12.23 19:14, Muggeridge, Matt (matt.mugg

RE: IPv6 Compliance for networkd

> -Original Message- > From: Demi Marie Obenour > Sent: Tuesday, December 12, 2023 11:38 AM > To: Muggeridge, Matt ; systemd- > de...@lists.freedesktop.org > Subject: Re: IPv6 Compliance for networkd > > On Mon, Dec 11, 2023 at 10:52:31PM +

RE: IPv6 Compliance for networkd

> -Original Message- > From: Demi Marie Obenour > Sent: Tuesday, December 12, 2023 7:14 AM > To: Muggeridge, Matt ; systemd- > de...@lists.freedesktop.org > Subject: Re: IPv6 Compliance for networkd > > On Mon, Dec 11, 2023 at 07:14:27PM +, Muggeridg

IPv6 Compliance for networkd

Hello, networkd developer community, I am hoping to rally support for making networkd IPv6 compliant and I'm will to help, but cannot do it alone. Is there any interest in making systemd-networkd IPv6 compliant? There are many organizations (especially US Government) that mandate IPv6 complian

networkd RetransmitSec - how to make it work on a host?

The RetransmitSec option was introduced in systemd-v255, but I cannot get it to work for Neighbor Solicitations from a Host. Instead, I observe that the NS are always transmitted at 1 second intervals, regardless of whether it was changed by: 1. Received RA Retransmit Timer 2. Sysctl net

[systemd-devel] systemd-networkd code design documentation?

Hi, As I start looking at the code, is there any design documentation for developers that describes systemd-networkd? Specifically, I'm looking for an overview of the data-flow when an IPv6 Router Advertisement is received, where it is processed and where it generates the reply. I'm slowly bu

[systemd-devel] DynamicUser=yes leads to "Too many levels of symbolic links" for /etc/.pwd.lock

Hi, I'm using systemd-v254. My rdisc service fails to start when "DynamicUser=yes", and the error message comes from systemd.execute.c. It's complaining about the /etc/.pwd.lock file (see journal below). I tu

[systemd-devel] How to autoconfigure IPv4 LinkLocalAddressing

Hi, I’m using systemd_254. I my ".network" configuration file (see below), I'm expecting that the “mul0” interface will always be assigned an IPv4 link local address. The documentation for LinkLocalAddressing describes: > An IPv4 link-local address is configured when yes or ipv4 and when D

Re: [systemd-devel] Networkd's IPv6 Compliance Issues

> -Original Message- > From: Stephen Hemminger > Sent: Thursday, July 27, 2023 2:04 AM > To: Muggeridge, Matt > Cc: systemd-devel@lists.freedesktop.org > Subject: Re: [systemd-devel] Networkd's IPv6 Compliance Issues > > On Wed, 26 Jul 2023 03:23:14 +000

[systemd-devel] Networkd's IPv6 Compliance Issues

Hi, Recently, we ran a test suite to check networkd's conformance to IPv6 Protocol (see https://www.ipv6ready.org/resources.html). I found a large number of test failures (more than 80) and after examining a small number of them, it became clear that networkd's implementation of IPv6 protocol

[systemd-devel] IPv6 Compliance Issues witih networkd

Hi there, I am noticing networkd has a number of IPv6 compliance issues, where it is not meeting various RFC's "must" requirements. For comparison, when I stop networkd and configure the network via legacy methods, the protocol exchanges comply with the RFCs. Would you prefer I raise the issu

[systemd-devel] IPv6AcceptRA: RDNSS Lifetime is not expiring

Hello there! In our IPv6 network, the address of a Recursive DNS Server (RDNSS) is supplied in a Router Advertisement (RA), with a lifetime of 60 seconds. It appears that RDNSS lifetime is not being honoured (RFC 8106, section 5.1