From: Ben Greear <greearb@candelatech.com>
To: netdev <netdev@vger.kernel.org>
Subject: Re: GRE devices and MULTICAST flag.
Date: Fri, 23 Sep 2011 13:42:53 -0700 [thread overview]
Message-ID: <4E7CEF4D.6080309@candelatech.com> (raw)
In-Reply-To: <4E7CE473.3000304@candelatech.com>
On 09/23/2011 12:56 PM, Ben Greear wrote:
> I was under the impression that GRE tunnels could support MULTICAST
> traffic, but the MULTICAST flag is not set. This is making the xorp
> router crap out because it checks the MULTICAST flag and will
> not start multicast on the interface if it's not set....
>
> Is it supposed to be set?
>
> 7: gre0: <NOARP,UP,LOWER_UP> mtu 1476 qdisc noqueue state UNKNOWN
> link/gre 0.0.0.0 brd 0.0.0.0
> 8: netb: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1476 qdisc noqueue state UNKNOWN
> link/gre 192.168.100.223 peer 192.168.100.138
> inet 10.0.1.1/32 scope global netb
Well, ifconfig netb multicast seems to add the flag,
so maybe all is as it should be.
Thanks,
Ben
--
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
next prev parent reply other threads:[~2011-09-23 20:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-23 19:56 GRE devices and MULTICAST flag Ben Greear
2011-09-23 20:42 ` Ben Greear [this message]
2011-09-23 21:16 ` David Lamparter
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