netdev - RE: Multicast problem

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <OF41E6EC02.7524B9F0-ON88257376.006B78BD-88257376.006C0648@us.ibm.com>
Date:	Tue, 16 Oct 2007 12:40:56 -0700
From:	David Stevens <dlstevens@...ibm.com>
To:	"Joakim Tjernlund" <joakim.tjernlund@...nsmode.se>
Cc:	"'Netdev'" <netdev@...r.kernel.org>
Subject: RE: Multicast problem

> 
> hmm maybe I misunderstand here, but the we are trying to make OSPF work
> in 2.6 and the problem appears to be that our board does not pick up
> multicasts.
> Is icmp_echo_ignore_broadcasts=0 required to make OSPF work in 2.6?
> 
>  Jocke
> 

        No, it's required to make "ping" to a multicast address
work, which is what your mail said was the problem. :-) "ping"
uses ICMP, OSPF does not.
        If you receive ping responses with ignore_broadcasts=0
and not in promiscuous mode, then the problem may be a smart
switch that doesn't understand IGMPv3. In that case, you
can try:

sysctl -w net.ipv4.conf.all.force_igmp_version=2

        You can also, of course, check /proc/net/igmp and
/proc/net/dev_mcast to make sure you've joined the OSPF
multicast address on the interface(s) you care about.

                                                +-DLS

-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html