From: P729 (p729@cox.net)
Date: Sun Jun 06 2004 - 19:24:32 GMT-3
Actually, what you have configured is a FastEtherChannel in Cisco parlance
and the answers to your questions depend on the context of the questions...
"...the bandwidth across the channel is 600M, is this correct?" In
marketing-speak, yes. 300 in one direction + 300 in the other certainly
comes out to 600. But what if most of the traffic flows from a web server on
one side to a bunch of clients on the other (small requests from the
clients, big responses from the server)? 300 becomes the more meaningful
number.
"...there is no need for additional configuration to load balance the
traffic over all 3 of these interfaces." Again using the above example,
load-balancing by src-mac on the server-end would be sub-optimal--all
traffic from the single server MAC address will have an affinity for the
same physical interface in the channel. Load-balancing by dst-mac (support
depends on switch platform) would be better on the server-end if the
destination was a pool of clients, while load-balancing by src-mac would be
better suited on the end facing the pool of clients. If most of the traffic
was between two high-powered servers, one on each side, the channel offers
no benefit unless you can mux on different TCP/UDP port numbers (assuming
there is a mix and again, support depends on switch platform) or the servers
have multiple adapters teamed in such a way that the load is distributed
across the unique MACs (some support EtherChannel itself as a mode of
teaming), etc.
Regards,
Mas Kato
https://ecardfile.com/id/mkato
----- Original Message -----
From: "Nancy Khln" <nancy_merill@yahoo.com>
To: <ccielab@groupstudy.com>
Sent: Sunday, June 06, 2004 8:12 AM
Subject: Trunk!
> Hi,
> I have configurd an ISL trunk between 3x 100 M ports(Full duplex), it is
my understanding that the bandwidth across the channel is 600M, is this
correct?
> Second question, the traffic between the switches across the ether channel
is load balanced by default? using the src-mac address. Is this correct? If
so, there is no need for additional configuration to load balance the
traffic over all 3 of these interfaces.
>
> Thank you
>
>
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