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Message-ID: <52F4207A.6020408@gmail.com> Date: Thu, 06 Feb 2014 15:53:30 -0800 From: Sridhar Samudrala <samudrala.sridhar@...il.com> To: "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: Re: VLAN ID 0 with priority tagging On 1/22/2014 3:49 PM, Sridhar Samudrala wrote: > I am trying to send a packet with VLAN ID 0 and non-zero priority. > > The VLAN interfaces are created on 2 hosts using > ip link add link eth1 eth1.0 type vlan id 0 egress-qos-map 0:2 > > When i try to send a packet using ping/arping, on the sender side tcpdump > shows that the VLAN tag is added with ID 0 and priority 2. > > However, the receiver is receiving the packet with vlan tag stripped. > > I am seeing the same behavior with multiple NICs and also with a > switch in > between the 2 hosts or with the 2 hosts connected over loopback cable. > > It looks as if the driver on the send side is stripping the tag if > vlan id is 0. > Is this correct behavior or a bug? > Any clues on how to get priority tagging to work with vlan id 0? > I sent this note a few weeks back, but i haven't seen any response so far. Is priority tagging with VLAN ID 0 not supported or is this a bug? It looks like the NIC hardware is stripping the VLAN tag if the id is 0 even when VLAN tag is added by the software. Thanks Sridhar -- 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
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