Etherchannel performance 4507RE

Unanswered Question
Apr 13th, 2012

I have a 4 port etherchannel configured to talk to a 4 port etherchannel on NETAPP server.  The NETAPP server seems to be distributing traffic across all the links.  The 4507 does not.  It appears that traffic is going across only 2 of the for links

Port-channel10 is up, line protocol is up (connected)

  Hardware is EtherChannel, address is c84c.759a.62e2 (bia c84c.759a.62e2)

  MTU 1500 bytes, BW 4000000 Kbit, DLY 10 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 1000Mb/s, media type is N/A

  input flow-control is off, output flow-control is unsupported

  Members in this channel: Gi6/17 Gi6/18 Gi6/19 Gi6/20

Server sending to switch

Port             InBytes   InUcastPkts   InMcastPkts   InBcastPkts

Gi6/17      263774770909     228034699         11576          1883

Gi6/18     1209580889290     892107627         17360             0

Gi6/19      115991867909      93034389         11576             0

Gi6/20      761051898228     812562534         48540             0

Switch sending to server

Port            OutBytes  OutUcastPkts  OutMcastPkts  OutBcastPkts
Gi6/17      522129808402     474077994        577206        365407
Gi6/18      181075481383     189468812         97514        365774
Gi6/19                 0             0             0             0<---
Gi6/20                 0             0             0             0 <---

Currently using  as my channel LB config - traffic to the server is from both vlan local to the server and not

EtherChannel Load-Balancing Configuration:

        src-dst-port EtherChannel Load-Balancing Configuration:
        src-dst-port

But have tried source IP, src-dst-ip

I have this problem too.
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glen.grant Fri, 04/13/2012 - 11:25

  All you can really do is to play with the load balancing algorithim and choose the one that gives you the best balance.  Are you sure  all 4 ports are active in that etherchannel ?   Verify with show etherc summ"  . 

Edison Ortiz Fri, 04/13/2012 - 13:18

Flows with the same src,dst,port will hash to the same link on an etherchannel. It is an expected behavior.

paul.pink@viacom.com Fri, 04/13/2012 - 13:29

Understood, but  the port channel is built to a server and I am sure there are more than two flows going to it.  Unfortunately the 4507RE does not support netflow and won't be able to provide any flow statistics. I will try and get that info from the server team next week..

Thanks

paul.pink@viacom.com Tue, 04/17/2012 - 08:47

Copy of the active server connections.   Server IP is 69.38 and all clients connect via port 445.  Is this a bug?

11.22.69.123.22      11.22.42.165.25331    65536      0   8760      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.173.4011     65535      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.162.4104     64893      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.205.3572     64184      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.92.4396      64137      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.105.1566     63740      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.44.55127     64640      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.96.54889     64512      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.96.54886     64256      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.224.2436     64762     39  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.123.3567     63272      0  64240      0 ESTABLISHED  -

11.22.69.38.445      172.23.98.22.49715     65280      0  64240      0 ESTABLISHED  -

11.22.69.38.445      172.23.98.26.51696     17408      0  64240      0 ESTABLISHED  -

11.22.69.38.445      172.23.98.38.55060     64512      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.35.59752     65536      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.147.1089     64512      0  64240      0 ESTABLISHED  -

11.22.69.38.445      172.23.98.14.59994     64256      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.67.34.55438     64484      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.61.55039     64256      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.29.52150     65024      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.72.63592     65536      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.66.51830    524280      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.146.1686     64893      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.153.1631     63199      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.36.59559    777472      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.101.52478    65536      0  64240      0 ESTABLISHED  -

11.22.69.38.445      172.23.98.11.59845     64512      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.43.66.1456      65535      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.144.49781   262140      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.60.3278      65535      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.51.65065     65024      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.85.62688     65012      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.47.1966      64264      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.11.1162      65367      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.88.64018    246784      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.45.4737      63409      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.128.1845     65108      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.141.2928     63077      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.103.53113   524280      0  64240      0 ESTABLISHED  -

11.22.69.38.139      11.22.42.67.49224     65535      0  64240      0 ESTABLISHED  -

11.22.69.38.445      172.23.105.12.49610   131684      0  64240      0 ESTABLISHED  -

11.22.69.38.445      11.22.42.53.1076      64317      0  64240      0 ESTABLISHED  -

Port           OutBytes OutUcastPkts OutMcastPkts OutBcastPkts

Gi6/17     610166948372     559760407       1085059       777676

Gi6/18     443113179770     421726844        245003       660588

Gi6/19                 0             0             0             0

Gi6/20                 0             0             0             0

Edison Ortiz Tue, 04/17/2012 - 10:32

Can you post configuration portion from the logical interface (port-channel) and physical interface members?

As well as 'show etherchannel summary'?

paul.pink@viacom.com Sat, 05/26/2012 - 11:55

From the Cisco side, It turns out the output counters on two of the  4507 switchports were not incrememting.  Also, the NETAPP vendor identified a bad interface card which was replaced.  

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Posted April 13, 2012 at 9:07 AM
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