From: Anand Raj Manickam <anandrm@gmail.com>
To: Francois Romieu <romieu@fr.zoreil.com>
Cc: netdev@vger.kernel.org, Hayes <hayeswang@realtek.com>
Subject: Re: Realtek r8168C / r8169 driver VLAN TAG stripping
Date: Thu, 27 Jan 2011 21:01:44 +0530 [thread overview]
Message-ID: <AANLkTi=OwsMO8x9AOy=MmohU4SSQcv+o=TvwNs0NNsQR@mail.gmail.com> (raw)
In-Reply-To: <20110127150744.GA7925@electric-eye.fr.zoreil.com>
On Thu, Jan 27, 2011 at 8:37 PM, Francois Romieu <romieu@fr.zoreil.com> wrote:
> Anand Raj Manickam <anandrm@gmail.com> :
> [...]
>> We upgraded to 2.6.36 kernel . The result is SAME.
>> The VLAN tag gets stripped ;-)
>> Do let me know if you need more info .
>
> - ip addr show
3: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:17:54:00:f6:62 brd ff:ff:ff:ff:ff:ff
inet 172.16.1.1/16 brd 172.16.255.255 scope global eth0
inet6 fe80::217:54ff:fe00:f662/64 scope link
valid_lft forever preferred_lft forever
8: eth0.50@eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc noqueue
link/ether 00:17:54:00:f6:62 brd ff:ff:ff:ff:ff:ff
inet 172.16.10.10/24 brd 172.16.10.255 scope global eth0.50
inet6 fe80::217:54ff:fe00:f662/64 scope link
valid_lft forever preferred_lft forever
> - ethtool -k eth0
Offload parameters for eth0:
rx-checksumming: on
tx-checksumming: off
scatter-gather: off
tcp segmentation offload: off
udp fragmentation offload: off
generic segmentation offload: off
> I do not get the "VLAN tag gets stripped" concept, especially on Tx.
> Does it mean "no packet" or "a packet whose content is wrong" ?
Sorry for not being clear ;-)
When we transmit a packet with VLAN TAG , the TAG get stripped when
transmitted through the device , the other end trunk port / sniffer
does NOT see a TAG.
Similarly , when a VLAN Tagged packet is sent from the other end , The
TAG gets stripped by the device , We DONOT see the tag .
I use tcpdump -i eth0 -n -nn -e vlan 50
to see if the packets are gettin tagged or NOT .
The same config works on forcedeth
Thanks,
Anand
>
> --
> Ueimor
>
next prev parent reply other threads:[~2011-01-27 15:31 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-13 14:40 Realtek r8168C / r8169 driver VLAN TAG stripping Anand Raj Manickam
2011-01-13 15:09 ` Anand Raj Manickam
2011-01-16 19:20 ` Francois Romieu
[not found] ` <AANLkTi=uNKMj_gs_bKRQ1tQa0TMwdnyrtVcR5JPNpmJv@mail.gmail.com>
2011-01-17 7:34 ` Anand Raj Manickam
2011-01-18 1:21 ` Francois Romieu
2011-01-27 10:35 ` Anand Raj Manickam
2011-01-27 15:07 ` Francois Romieu
2011-01-27 15:31 ` Anand Raj Manickam [this message]
2011-01-27 16:50 ` Francois Romieu
2011-01-28 1:40 ` Anand Raj Manickam
2011-01-28 12:06 ` Francois Romieu
2011-01-28 12:16 ` Anand Raj Manickam
2011-01-31 5:45 ` hayeswang
2011-01-31 13:14 ` Ivan Vecera
2011-02-01 10:12 ` Francois Romieu
2011-02-01 10:38 ` Anand Raj Manickam
2011-02-09 9:51 ` hayeswang
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