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New Member

dynamic port channel and load distribution across the interfaces on th trunk.

WS-C3750G-48TS

NOS-12.2(25)SEE2

I have a dynamic port channenl setup on Cisco+NetApp environemt where i have 6 interfaces(1Gbps) on that trunk for load balancing and reduntancy reason.

But i see the interfaces are not balanced on receives or inbound. I mean most of them are going to only 2 interfaces and other four are almost doing nothing.

I am assuming netapp ports serves the way how Cisco instructs. How i can remediate this situation? What am i missing here?

5 REPLIES
New Member

dynamic port channel and load distribution across the interfaces

Hi

Version of Ontap?

The exact config of the vif?

Thanks

New Member

dynamic port channel and load distribution across the interfaces

OnTap 7.3.6 and filer side dynamic multimode vif (lacp) configured. d2,d3,d6 being the filer ip address vif create lacp vif0 -b ip e0a e0b e4a e4b e4c e4d ifconfig vif0 `hostname`-vif0 mediatype auto netmask 255.255.255.0 partner vif0 -wins ifconfig vif0 alias a.b.c.d2 netmask 255.255.255.0 ifconfig vif0 alias a.b.c.d3 netmask 255.255.255.0 ifconfig vif0 alias a.b.c.d6 netmask 255.255.255.0

New Member

dynamic port channel and load distribution across the interfaces

what is the default load balancing algorithms used in C3750( ip based?)

New Member

dynamic port channel and load distribution across the interfaces

Also, could you share what option you have checked in NetApp (System Manager) VIF settings? There are three options,,, Single, Multiple, LACP? - Make sure you have LACP selected. And load balance type? IP based or Mac based? Check this article, which provided you good info:

http://blog.scottlowe.org/2008/01/08/lacp-with-cisco-switches-and-netapp-vifs/

Thanks,

Nisar Sayed

New Member

dynamic port channel and load distribution across the interfaces

I have alerady mentioned "lacp" in my my last post. Also my understanding  LB is set at switch side , not at filer side. Becase i dont have config at filer side. Also loooking the link there also  dont see a config which says use a particular LB.But the article clearly says to use "ip load balace", no clue though where it is set.  hence my question what is the default LB used/set at switch side. http://now.netapp.com/NOW/knowledge/docs/ontap/rel727/html/ontap/nag/7vifs3.htm https://communities.netapp.com/community/netapp-blogs/sanbytes/blog/2011/12/13/what-value-does-the-leading-fc-switch-vendor-bring-to-ethernet-guest-post-by-brocade http://blog.ioshints.info/2011/04/brocade-vcs-fabric-has-almost-perfect.html may be a good reads i guess.

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