Re: IPv4 networking problem after dist-upgrade

From	Oleg <gandalf+debian@stillroot.org>
Newsgroups	linux.debian.user
Subject	Re: IPv4 networking problem after dist-upgrade
Date	2021-10-06 21:10 +0200
Message-ID	<D5ksG-3th-5@gated-at.bofh.it> (permalink)
References	<D5ewV-89C-1@gated-at.bofh.it> <D5g5I-Jx-3@gated-at.bofh.it> <D5hEu-1LE-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

Hi again!

On Wed, Oct 06, 2021 at 06:02:40PM +0200, Oleg wrote:
> > ip link show
> 
> $ > ip l sh
> <snip>...</snip>
> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1492 qdisc pfifo_fast master direct0 state UP mode DEFAULT group default qlen 1000
>     link/ether 54:04:a6:a0:77:de brd ff:ff:ff:ff:ff:ff
> 3: direct0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1492 qdisc noqueue state UP mode DEFAULT group default qlen 1000
>     link/ether 32:95:e2:a2:8e:0e brd ff:ff:ff:ff:ff:ff
> <snip>...</snip>

Apparently the error originated from the deviating MAC address of physical
interface and bridge. After I configured direct0 to have the same MAC address
as eth0 IPv4 started to work as expected again.

I assume that some security/anti-spoofing mechanism on the network/gateway
side rejected the "new" MAC address that has probably changed during the
upgrade.

Cheers
Oleg

Back to linux.debian.user | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

IPv4 networking problem after dist-upgrade Oleg <gandalf+debian@stillroot.org> - 2021-10-06 14:50 +0200
  Re: IPv4 networking problem after dist-upgrade Dan Ritter <dsr@randomstring.org> - 2021-10-06 16:30 +0200
    Re: IPv4 networking problem after dist-upgrade Oleg <gandalf+debian@stillroot.org> - 2021-10-06 18:10 +0200
      Re: IPv4 networking problem after dist-upgrade Oleg <gandalf+debian@stillroot.org> - 2021-10-06 21:10 +0200

csiph-web