Interesting.
Intel supports load balancing ("adapter teaming"), but it says that it
only does so on output, implying that only the "primary" adapter
responds to ARP requests (until a failure, when the "secondary" takes
over all functions, providing for failover as well as load sharing).
I had earlier posted a question as to why the Intel would work this way,
wondering why both NICs couldn't respond to ARPs. I hadn't thought
about the NICs alternating in ARP responses, which, it seems, would also
work -- and make more sense.
-------------------------------------------------
Tks | <mailto:[EMAIL PROTECTED]>
BV | <mailto:[EMAIL PROTECTED]>
Sr. Technical Consultant, SBM, A Gates/Arrow Co.
Vox 770-623-3430 11455 Lakefield Dr.
Fax 770-623-3429 Duluth, GA 30097-1511
=================================================
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Kenneth
Sent: Sunday, February 11, 2001 8:53 AM
To: [EMAIL PROTECTED]
Subject: Re: loadbalancing with NIC's
The 6509 will see it as 2 separate MAC addresses. Based on my
conversation
with Ipmetrics engineer (i think it was them) the way it functions is
this:
Server A has ip 192.168.1.5
The NIC that is capable of loadbalancing maintains two unique MAC
addresses.
Everytime a client generates an arp request, it gives out MAC Address 1
When Another client generates an arp request, it gives out MAC address 2
It does this by doing a round-robin
Based on this, incoming requests are done via static load-balancing,
meaning, there is a static mapping of client-MAC to server-MAC. In case
of a
large network, statistically, this will provide an equal load on both
ports.
The switch will not use STP to block ports since there are two different
MAC
address on two different ports.
Hope this helps!
Kenneth Lorenzo
Moahzam Durrani <[EMAIL PROTECTED]> wrote in message
ED49D16A9BE4D41189C000104B2E399864C08D@sj-exchange">news:ED49D16A9BE4D41189C000104B2E399864C08D@sj-exchange...
>
> We are planning to connect a server with a single NIC that supports
> faultolerance , redudndancy and load balancing. How does a C6509
treat a
> Nic that is connected to two of its ports (same vlans)
> Mo Durrani
> IS&T
> WYSE\EDS
> phone:408-473 1246
> [EMAIL PROTECTED]
> [EMAIL PROTECTED]
>
>
> _________________________________
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