Does my channel bond work-2

[abhishek Sinha]

Hi Beowulfers

I have been troubling the list with all sorts of
channel bonding issues.Finally found what i am looking
for.If i tell my HP procurve switch to be smart
(trunked and VLANed ) switch it doesnt work properly.
But just when i tell it to be just a stupid ethernet
switch with no functionality , Bingo i get all load
balanced on both the nics in both the sender and the
receiver side. Any one arrived at a similar
conclusion...Let me know..

thanks for all the help guys

Abhishek



--- abhishek Sinha <aby_sinha at yahoo.com> wrote:
> Hi Beowulfers
> 
> 
> --- Martin Siegert <siegert at sfu.ca> wrote:
> > First of all: does your channel bonding setup work
> > without a switch,
> > i.e., just with two cross over cables between two
> > nodes?
> > If that is the case, then clearly the switch
> > configuration is at fault.
> > 
> 
> 
> YEs that is the case
> 
> > Channel bonding works by assigning the same Mac
> > address to both NICs
> > in the box. Switches get confused, if they see
> > traffic on different
> > ports coming from the same Mac address. This
> problem
> > is solved
> > by either
> > - using one switch for each trunk (i.e., switch 1
> > for all the first NICs
> > in each host, switch 2 for all the second NICs in
> > each host). This is
> > the easiest setup and that is what I am using.
> > - or by setting up VLANs on the switch and
> > connecting the first NICs to
> > one VLAN and the second NICs to another. Obviously
> > the switch must
> > support VLANs. I do not know whether the HP switch
> > does.
> 
> What is exactly happening is that when i am trying
> to
> send packets from one node to another, all my
> packets
> are coming out from the One interface but they get
> load balanced on both the nics when they reach the
> other nodes. For Eg , when i send 10 packets my eth0
> for node 1 sends all of them but at node 2 5 packets
> get received by eth0 and 5 by eth1. Does this always
> happen in channel bonding. Shouldnt the packets come
> out load balanced from the node .
> 
> the other thing is related to the switch that i am
> using. The HP pro curve 4000M has an option where
> you
> can trunk lines to load balance / channel bond.
> this is what happens when i use netperf. since the
> packets only come out of the one interface i am
> getting a ~90 MBPs on the sender side. I also tried
> doing this with VLANs . I put all eth0 s in one
> untagged VLAN and all the eth1 s  in another
> untagged
> VLAN.Again the same performacne using netperf.And
> Still the load doesnt balance properly.
> 
> I know my channel bond is working since when i tried
> using cross over cables and then used netperf I got
> 191MBPs. But when the switch comes into picture ; i
> just dont know what happens. 
> 
> Any suggestions on this one..
> 
> -A
> 
> 
> > On Wed, May 08, 2002 at 04:47:22PM -0700, abhishek
> > Sinha wrote:
> > > Now this is some interesting stuff that i
> actually
> > > found out
> > > 
> > > I just monitored the packets from the switch to
> > see
> > > actually where they are going into
> > > 
> > > 
> > > TRK1 =node2
> > > TRK2=node1
> > > 
> > > When Sending a big file from node2 to node1
> > > 
> > > HP ProCurve Switch 4000M        DEFAULT_CONFIG  
>  
> >    
> > >      1-Jan-1990   1:09:08
> > > ==========================- CONSOLE - MANAGER
> MODE
> > > -============================                   
>  
> > > Status and Counters - Port Counters       
> > > 
> > >    Port     Total Bytes   Total Frames    
> Errors
> > Rx  
> > >    Drops Tx
> > >   -------  -------------  ------------- 
> > -------------
> > >  -------------
> > >   A1                   0              0         
>  
> >   0
> > >              0
> > >   C1-Trk1      3,640,711         48,116         
>  
> >   0
> > >              0
> > >   C2-Trk1    100,742,642         71,606         
>  
> >   0
> > >              0
> > >   C3-Trk2     50,523,420         35,804         
>  
> >   0
> > >              0
> > >   C4-Trk2     53,859,933         83,918         
>  
> >   0
> > >              0
> > >   C5-Trk3              0              0         
>  
> >   0
> > >              0
> > >   C6-Trk3              0              0         
>  
> >   0
> > >              0
> > >   C7-Trk4              0              0         
>  
> >   0
> > >              0
> > >   C8-Trk4              0              0         
>  
> >   0
> > >              0
> > >   D1                   0              0         
>  
> >   0
> > >              0
> > >   D2                   0              0         
>  
> >   0
> > >              0
> > > 
> > >  Actions->   Back     Show details     Reset    
> > Help
> > > 
> > > 
> > > when sending a big file from node1 to node2
> > > 
> > >  Port     Total Bytes   Total Frames     Errors
> Rx
> >    
> > >  Drops Tx
> > >   -------  -------------  ------------- 
> > -------------
> > >  -------------
> > >   A1                   0              0         
>  
> >   0
> > >              0
> > >   C1-Trk1    100,432,998         69,876         
>  
> >   0
> > >              0
> > >   C2-Trk1      2,707,873         35,263         
>  
> >   0
> > >              0
> > >   C3-Trk2      1,355,028         17,632         
>  
> >   0
> > >              0
> > >   C4-Trk2    101,785,843         87,507         
>  
> >   0
> > >              0
> > >   C5-Trk3              0              0         
>  
> >   0
> > >              0
> > >   C6-Trk3              0              0         
>  
> >   0
> > >              0
> > >   C7-Trk4              0              0         
>  
> >   0
> > >              0
> > >   C8-Trk4              0              0         
>  
> >   0
> > >              0
> > >   D1                   0              0         
>  
> >   0
> > >              0
> 
=== message truncated ===


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