From: Baruch Even <baruch@ev-en.org>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: netdev@vger.kernel.org
Subject: Re: Multicast and hardware checksum
Date: Fri, 08 Jun 2007 14:33:07 +0300 [thread overview]
Message-ID: <46693E73.3030707@ev-en.org> (raw)
In-Reply-To: <46693A3B.70202@ev-en.org>
Baruch Even wrote:
> Herbert Xu wrote:
>> On Fri, Jun 08, 2007 at 02:02:27PM +0300, Baruch Even wrote:
>>> As far as IGMP and multicast handling everything works, the packets
>>> are even forwarded over the ppp links but they arrive to the client
>>> with a bad checksum. I don't have the trace in front of me but I
>>> believe it was the UDP checksum that failed.
>>
>> What kind of a ppp device is this?
>>
>> If you run a tcpdump either side of the ppp link do you see the same
>> UDP checksum value?
>
> This is a pptp link. I've checked the checksum on the receive side, I
> don't know on the sender side and I'll only be able to try it on Sunday.
For completeness, the clients are Windows XP clients and the server is a
Linux machine. The tunnel is mppe encrypted so I believe that what
goes out on the client is the same as what got in on the server.
Baruch
prev parent reply other threads:[~2007-06-08 11:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-07 22:33 Multicast and hardware checksum Baruch Even
2007-06-08 6:20 ` Herbert Xu
2007-06-08 11:02 ` Baruch Even
2007-06-08 11:06 ` Herbert Xu
2007-06-08 11:15 ` Baruch Even
2007-06-08 11:33 ` Baruch Even [this message]
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