bug#52520: closed (Multicast is off by default)

[GNU bug Tracking System]

Your message dated Tue, 21 Dec 2021 20:40:29 +0100
with message-id <87ilvhbvbm.fsf@gnu.org>
and subject line Re: bug#52520: Multicast is off by default
has caused the debbugs.gnu.org bug report #52520,
regarding Multicast is off by default
to be marked as done.

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-- 
52520: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=52520
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> --- Begin Message ---
>
>
>
> Subject: 
>
> Multicast is off by default
>
>
>
>
> Date: 
>
> Wed, 15 Dec 2021 20:36:06 +0100
>
>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux)
>
>
>
>
> Hello,
>
> Since the guile-netlink switch the static IP interfaces no longer have
> multicast support. This can be confirmed this way:
>
> --8<---------------cut here---------------start------------->8---
> 4: eno4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default 
> qlen 1000
>     link/ether b0:26:28:b7:9d:09 brd ff:ff:ff:ff:ff:ff
> 5: eno2: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 
> 1000
>     link/ether b0:26:28:b7:9d:0b brd ff:ff:ff:ff:ff:ff
>     inet 141.80.181.40/24 brd 141.80.181.255 scope global eno2
>        valid_lft forever preferred_lft forever
>     inet6 fe80::b226:28ff:feb7:9d0b/64 scope link 
>        valid_lft forever preferred_lft forever
> --8<---------------cut here---------------end--------------->8---
>
> eno2 that is managed by the static-networking service is lacking
> multicast support, while eno4 that is not managed by this service has
> multicast support.
>
> This can be adjusted by running:
>
> --8<---------------cut here---------------start------------->8---
> ip link set multicast on eno1
> --8<---------------cut here---------------end--------------->8---
>
> which immediately fixes Avahi discovery that depends on it.
>
> I think that we could maybe apply the following patch, even though I
> didn't test it.
>
> --8<---------------cut here---------------start------------->8---
> diff --git a/gnu/services/base.scm b/gnu/services/base.scm
> index 5f93483dda..af3fe015b9 100644
> --- a/gnu/services/base.scm
> +++ b/gnu/services/base.scm
> @@ -2546,6 +2546,7 @@ (define network-set-up/linux
>                                                  #$(network-address-ipv6? 
> address))
>                                        ;; FIXME: loopback?
>                                        (link-set #$(network-address-device 
> address)
> +                                                #:multicast-on #t
>                                                  #:up #t)))
>                                  addresses)
> --8<---------------cut here---------------end--------------->8---
>
> Thanks,
>
> Mathieu
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#52520: Multicast is off by default
>
>
>
>
> Date: 
>
> Tue, 21 Dec 2021 20:40:29 +0100
>
>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux)
>
>
>
>
> Hey,
>
> > BTW, for the purposes of fixing the bug you initially reported, I
> > suggest simply adding #:multicast-on #t as you initially proposed.
> > We discuss the proper API separately.
>
> Done with: d2f9578a9f1249dfecb0a6b4cd06fd9641fcd1a9.
>
> Thanks,
>
> Mathieu
>
>
> --- End Message ---