From: Eric Dobyns (eric_dobyns@yahoo.com)
Date: Fri Jul 06 2007 - 01:27:38 ART
I was thinking this would be met by use of MST and port-priorities on the
different strands of the port-channel so that each MST instance preferred a
different link in the channel.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Mike
Kraus (mikraus)
Sent: Thursday, July 05, 2007 6:49 PM
To: David Prall; Antonio Soares; ccielab@groupstudy.com
Subject: RE: Catalyst 3560 Port-Channel Load-Balance
Antonio,
Here are my thoughts on the below:
A) 1 Host---CatA====Etherchannel====CatB----1 Host
- Makes no difference, like David stated, without L4 info, no
way to optimize this (unless multiple NICs, etc.). 6500's for
everyone!!
B) 1 Host---CatA====Etherchannel====CatB----1000 Hosts
- Assuming all 1000 hosts are directly connected - anything with
dst in it is fine (dst-ip, src-dst-ip, src-dst-mac). If there's a
router-hop, you would want to use dst-ip or src-dst-ip, since all the
macs will be the same. (I guess you could argue that dst-ip is more
efficient than src-dst-ip, since the source IP would always be the
same.)
C) 1000 Hosts---CatA====Etherchannel====CatB----1 Host
- Anything with src in it in general, but same concept applies.
If all 1000 hosts directly connected, src-mac is fine. If some of the
1000 hosts are behind a router hop src-ip or src-dst-ip.
D) 1000 Hosts---CatA====Etherchannel====CatB----1000 Host
- If all hosts are directly connected, src-dst-mac or src-dst-ip
can be used. If there is a router-hop on either side, use src-dst-ip.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
David Prall
Sent: Thursday, July 05, 2007 8:27 PM
To: 'Antonio Soares'; ccielab@groupstudy.com
Subject: RE: Catalyst 3560 Port-Channel Load-Balance
This presentation discusses it, although the 6500 can use L4 information
as well http://www.cisco.com/web/AT/assets/docs/chap5_Internals.pdf
1 host to 1 host will only use a single port, so a 10GE connected host
can only send 1GE across an 8-port GE Etherchannel.
-- http://dcp.dcptech.com> -----Original Message----- > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf > Of Antonio Soares > Sent: Thursday, July 05, 2007 9:01 PM > To: ccielab@groupstudy.com > Subject: Catalyst 3560 Port-Channel Load-Balance > > Hello group, > > This is a feature that i'm not confortable with. I see too many > options and i don't know exactly which one to apply for a given > scenario. Besides that, it will affect differently 3 types of traffic:
> non-IP, IPv4 and IPv6. > > Here's the command and options: > > port-channel load-balance {dst-ip | dst-mac | src-dst-ip | src-dst-mac
> | src-ip | src-mac} > > > Let's say we have these 4 hipotetical scenarios: > > > A) 1 Host---CatA====Etherchannel====CatB----1 Host > > B) 1 Host---CatA====Etherchannel====CatB----1000 Hosts > > C) 1000 Hosts---CatA====Etherchannel====CatB----1 Host > > D) 1000 Hosts---CatA====Etherchannel====CatB----1000 Host > > > In CatA's perspective, which option best fits each scenario ? > For simplicity, assume IPv4 only traffic. > > > > Thanks, > Antonio > > ______________________________________________________________ > _________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html
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