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

[Nexus 7k] Port-chnnel dropping packets when applying QoS

Hi, All:

On a Nexus 7k with version 6.1.2, I have the following QoS configuration:

Admin VDC:

class-map type queuing match-any 1p7q4t-out-pq1

  match cos 5-7

class-map type queuing match-any 1p7q4t-out-q2

  match cos 2

class-map type queuing match-any 1p7q4t-out-q3

  match cos 3

class-map type queuing match-any 1p7q4t-out-q4

  match cos 4

class-map type queuing match-any 1p7q4t-out-q5

class-map type queuing match-any 1p7q4t-out-q-default

  match cos 0-1

Operating VDC:

ip access-list VOD

  10 permit ip any any

class-map type qos match-any VOD

  match access-group name VOD

policy-map type qos SET-VOD-QOS

  class VOD

    set cos 4

policy-map type queuing DC-OUT

  class type queuing 1p7q4t-out-q4

    bandwidth percent 75

What I'm trying to do is use a specific queue for a certain kind of traffic, but before I (think) I get to actually applying the queuing part, the outbound interface drops some traffic.

See,if I don't apply any QoS to any interface, traffic pases normally no drops:

DCR-NX-1# show interface e4/21 counters errors

--------------------------------------------------------------------------------

Port          Align-Err    FCS-Err   Xmit-Err    Rcv-Err  UnderSize OutDiscards

--------------------------------------------------------------------------------

Eth4/21               0          0          0          0          0           0

[snip]

Eth4/21            0          --           0           0           0          0

DCR-NX-1#

The minute I apply the inbound marking I start seeing drops on the outbound port channel, BUT this happens as soon when I apply the inbound marking:

DCR-NX-1(config)# int port-channel 10.2051

DCR-NX-1(config-subif)# service-policy input SET-VOD-QOS

DCR-NX-1(config-subif)#

DCR-NX-1# clear counters interface e4/21

DCR-NX-1# show interface e4/21 counters errors

--------------------------------------------------------------------------------

Port          Align-Err    FCS-Err   Xmit-Err    Rcv-Err  UnderSize OutDiscards

--------------------------------------------------------------------------------

Eth4/21               0          0          0          0          0         210

--------------------------------------------------------------------------------

Port         Single-Col  Multi-Col   Late-Col  Exces-Col  Carri-Sen       Runts

--------------------------------------------------------------------------------

Eth4/21               0          0          0          0          0           0

--------------------------------------------------------------------------------

Port          Giants SQETest-Err Deferred-Tx IntMacTx-Er IntMacRx-Er Symbol-Err

--------------------------------------------------------------------------------

Eth4/21     

DCR-NX-1# show interface e4/21 counters errors

--------------------------------------------------------------------------------

Port          Align-Err    FCS-Err   Xmit-Err    Rcv-Err  UnderSize OutDiscards

--------------------------------------------------------------------------------

Eth4/21               0          0          0          0          0        1251

--------------------------------------------------------------------------------

Port         Single-Col  Multi-Col   Late-Col  Exces-Col  Carri-Sen       Runts

--------------------------------------------------------------------------------

Eth4/21               0          0          0          0          0           0

--------------------------------------------------------------------------------

Port          Giants SQETest-Err Deferred-Tx IntMacTx-Er IntMacRx-Er Symbol-Err

--------------------------------------------------------------------------------

Eth4/21  

DCR-NX-1# show system internal qos queuing stats interface e4/21 | i Dropped

        Dropped total                0

        Dropped total                0

        Dropped total                0

        Dropped total                0

        Dropped total                0

        Dropped total                0

        Dropped total                0

        Dropped total                0

        Dropped total                0

        Dropped total                0

        Dropped total                0

        Dropped total                2343

        Dropped total                0

        Dropped total                0

        Dropped total                0

        Dropped total                0

DCR-NX-1#

Can you please review my config and let me know if you see something wrong with it?

Thanks in advance!

c.

Everyone's tags (3)
457
Views
0
Helpful
0
Replies
CreatePlease to create content