netdev - RE: [E1000-devel] fail to add 64 VLANs or more when SR-IOV is enabled

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Date:	Thu, 3 Apr 2014 01:12:13 +0000
From:	Madoka Komatsubara <m-komatsubara@...jp.nec.com>
To:	"Fujinaka, Todd" <todd.fujinaka@...el.com>,
	"Skidmore, Donald C" <donald.c.skidmore@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:	Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>,
	Hiroshi Baba <h-baba@...jp.nec.com>
Subject: RE: [E1000-devel] fail to add 64 VLANs or more when SR-IOV is
	enabled


> -----Original Message-----
> From: Fujinaka, Todd [mailto:todd.fujinaka@...el.com]
> Sent: Thursday, April 03, 2014 8:23 AM
> To: Komatsubara Madoka(小松原 円); Skidmore, Donald C;
> linux-kernel@...r.kernel.org; e1000-devel@...ts.sourceforge.net;
> netdev@...r.kernel.org
> Cc: Shimamoto Hiroshi(島本 裕志); Baba Hiroshi(馬場 裕司)
> Subject: RE: [E1000-devel] fail to add 64 VLANs or more when SR-IOV is enabled
> 
> I think you're running into the filter limit for VFs.
> 

Hi Todd,

Thank you for the quick response.
How can I increase the limit？


Regards,
Madoka Komatsubara



> Todd Fujinaka
> Software Application Engineer
> Networking Division (ND)
> Intel Corporation
> todd.fujinaka@...el.com
> (503) 712-4565
> 
> 
> -----Original Message-----
> From: Madoka Komatsubara [mailto:m-komatsubara@...jp.nec.com]
> Sent: Wednesday, April 02, 2014 2:11 AM
> To: Skidmore, Donald C; linux-kernel@...r.kernel.org;
> e1000-devel@...ts.sourceforge.net; netdev@...r.kernel.org
> Cc: Hiroshi Shimamoto; Hiroshi Baba
> Subject: Re: [E1000-devel] fail to add 64 VLANs or more when SR-IOV is enabled
> 
> 
> >-----Original Message-----
> >From: Komatsubara Madoka(小松原 円)
> >Sent: Thursday, March 27, 2014 6:11 PM
> >To: 'linux-kernel@...r.kernel.org'; 'e1000-devel@...ts.sourceforge.net';
> 'netdev@...r.kernel.org'
> >Cc: Shimamoto Hiroshi(島本 裕志); Baba Hiroshi(馬場 裕司)
> >Subject: fail to add 64 VLANs or more when SR-IOV is enabled
> >
> >Hi all,
> >
> >
> >We're facing an issue that we cannot add 64 VLANs or more per VF.
> >When using SR-IOV, pass through a VF to the KVM guest and a lot of VLANs,
> we could add 63 VLANs using vconfig but we >failed to add 64th VLAN.
> >We'd like to use many VLANs on the guest with SR-IOV.
> >We're using Intel's 82599EB chip with ixgbe and ixgbevf driver.
> >
> >Has anyone seen the same issue?
> >Is there any idea to solve this?
> >
> 
> Hi Donald,
> 
> Do you also notice this problem?
> We're facing an issue that we can use only 64 VLANs per VF.
> We're using Intel's 82599EB chip with ixgbe and ixgbevf driver.
> 
> 
> Is it subject to the specification restrictions only 64 VLAN can use per VF?
> We'd like to use about 2000 VLAN per VF.
> 
> Does it come from hardware?
> 
> 
> 
> Regards,
> Madoka Komatsubara
> 
> 
> >The below instruction is a reproducing method.
> >Create hundred VLANs on the guest.
> >
> ># for i in `seq 100 199`; do vconfig add eth2 $i; ifconfig 192.168.$i.1/24;
> done
> >
> ># vconfig add eth2 100
> >Added VLAN with VID == 100 to IF -:eth2:-
> >
> ># vconfig add eth2 101
> >Added VLAN with VID == 101 to IF -:eth2:-
> >
> ># vconfig add eth2 102
> >Added VLAN with VID == 102 to IF -:eth2:-
> >
> >...
> >
> ># vconfig add eth2 162
> >Added VLAN with VID == 162 to IF -:eth2:-
> >
> ># vconfig add eth2 163
> >ERROR: trying to add VLAN #163 to IF -:eth2:-  error: Permission denied
> >SIOCSIFADDR: No such device
> >eth2.163: unknown interface: No such device
> >
> ># vconfig add eth2 164
> >ERROR: trying to add VLAN #164 to IF -:eth2:-  error: Permission denied
> >SIOCSIFADDR: No such device
> >eth2.164: unknown interface: No such device
> >
> ># vconfig add eth2 165
> >ERROR: trying to add VLAN #165 to IF -:eth2:-  error: Permission denied
> >SIOCSIFADDR: No such device
> >eth2.165: unknown interface: No such device
> >
> >
> >thanks,
> >Madoka Komatsubara
> 
> 
> -------------------------------------------------------------------------
> -----
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