Messages in this thread | | | From | Madoka Komatsubara <> | Subject | fail to add 64 VLANs or more when SR-IOV is enabled | Date | Thu, 27 Mar 2014 09:10:32 +0000 |
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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?
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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