Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
New Member

veth drops on nexus1000v toward vmk

Hi all,

during a troubleshooting analisys I've noted a lot of drops on some of Nexus1000v interfaces.

The 1000v is in an architecture with N7k-UCS FI 6296-UCS blade M series- Vmware Esxi5.1

1000v version is 4.2(1)SV1(5.2)

In particular the drops occurred on veth interfaces toward vmk for Vmotion and Vxlan (two different vmkx- vmk2/vmk3) , and on uplink portchannel dedicated to vxlan and vmotion.

Vxlan implementation is a L2 one.

On portchannel we use mac address pinning toward UCS End Host Mode, so the drops are quite normal ( broadcast/multicast on non designated port), but i'm worried about the drops on vmk.

I've cleared the counters on one of the veth interface, and the drops are still 0, no increment.

Someone can help me to investigate about the problem ?

Maybe some Mtu issue on Dvswitch, or on ESxi  ?

Or some performance issue ? I think these drops occur  during a peak of traffic toward a customer VM ( the traffic was only 70k ppps , so not so high to think of a performance issue..).

These are the drops on one of the vmk for vxlan  ( input+output , or output only)

Vethernet4 is up

  Port description is VMware VMkernel, vmk3

  Owner is VMware VMkernel, adapter is vmk3

  Active on module 10

  VMware DVS port 104

  Port-Profile is 1120-VXLAN

  Port mode is access

  5 minute input rate 88509912 bits/second, 12542 packets/second

  5 minute output rate 22010120 bits/second, 9501 packets/second

  Rx

    90293108855 Input Packets 7293052419905852798 Unicast Packets

    2319412221426068554 Multicast Packets 240550728439 Broadcast Packets

    94313685068147 Bytes

  Tx

    114597486997 Output Packets 65506738625 Unicast Packets

    3775177797832689983 Multicast Packets 62508584 Broadcast Packets 2159481 Flood Packets

    39473265121989 Bytes

    0 Input Packet Drops 1297658861645201427 Output Packet Drops

or

Vethernet15 is up

  Port description is VMware VMkernel, vmk3

  Owner is VMware VMkernel, adapter is vmk3

  Active on module 7

  VMware DVS port 103

  Port-Profile is 1120-VXLAN

  Port mode is access

  5 minute input rate 3119448 bits/second, 940 packets/second

  5 minute output rate 8593160 bits/second, 1294 packets/second

  Rx

    7885912029 Input Packets 4121983545487723792 Unicast Packets

    3472330426551476492 Multicast Packets 7307199665338263582 Broadcast Packets

    3607343173490 Bytes

  Tx

    10215155642 Output Packets 9550212849 Unicast Packets

    8386058791768379170 Multicast Packets 7162252202995480725 Broadcast Packets 8030178 Flood

Packets

    10342867772679 Bytes

    7954892334481738253 Input Packet Drops 2322280091609214343 Output Packet Drops

Thanks

Federica

3 REPLIES
New Member

veth drops on nexus1000v toward vmk

sorry,  esxi version is 5.0.0

Cisco Employee

veth drops on nexus1000v toward vmk

Hello,

Do you face any problems with respect to connectivity/performance etc?

The drops are pretty high - it could be a cosmetic issue (CSCtx66382)

Can you paste the port-profile config that's used for these Veth interfaces and also try the vempkt capture to see if it's cosmetic or real?

Thanks,

Shankar

New Member

veth drops on nexus1000v toward vmk

Thanks for your reply,

The drops are not incrementing now, but  we experienced network performance issues  during the drops..

As soon as possible i'll try the vempkt capture, even if now i've no drops.

Here the port profile for vmk2 and vmk3

vmk3 :

port-profile 1120-VXLAN

type: Vethernet

description:

status: enabled

max-ports: 32

min-ports: 1

inherit:

config attributes:

  capability vxlan

  switchport mode access

  switchport access vlan 1120

  no shutdown

evaluated config attributes:

  capability vxlan

  switchport mode access

  switchport access vlan 1120

  no shutdown

assigned interfaces:

  Vethernet2

  Vethernet4

  Vethernet9

  Vethernet11

  Vethernet13

  Vethernet15

  Vethernet16

  Vethernet17

  Vethernet238

  Vethernet240

  Vethernet244

  Vethernet680

  Vethernet744

  Vethernet878

port-group: 1120-VXLAN

system vlans: none

capability l3control: no

capability iscsi-multipath: no

capability vxlan: yes

capability l3-vn-service: no

port-profile role: none

port-binding: static

vmk2 :

port-profile 1100-vMotion

type: Vethernet

description:

status: enabled

max-ports: 32

min-ports: 1

inherit:

config attributes:

  switchport mode access

  switchport access vlan 1100

  no shutdown

evaluated config attributes:

  switchport mode access

  switchport access vlan 1100

  no shutdown

assigned interfaces:

  Vethernet1

  Vethernet3

  Vethernet5

  Vethernet6

  Vethernet7

  Vethernet8

  Vethernet10

  Vethernet12

  Vethernet233

  Vethernet239

  Vethernet243

  Vethernet673

  Vethernet676

  Vethernet877

port-group: 1100-vMotion

system vlans: none

capability l3control: no

capability iscsi-multipath: no

capability vxlan: no

capability l3-vn-service: no

port-profile role: none

port-binding: static

Thanks

Federica

594
Views
0
Helpful
3
Replies
CreatePlease to create content