From: Joseph Brunner (joe@affirmedsystems.com)
Date: Sun Nov 04 2007 - 03:13:17 ART
The 3550's and 3560 share dst-mac & src-mac, while the 3560 add's more
options...
rack1sw1(config)#port-channel load-balance ? (3560)
dst-ip Dst IP Addr
dst-mac Dst Mac Addr
src-dst-ip Src XOR Dst IP Addr
src-dst-mac Src XOR Dst Mac Addr
src-ip Src IP Addr
src-mac Src Mac Addr
rack1sw2(config)#port-channel load-balance ? (3550)
dst-mac Dst Mac Addr
src-mac Src Mac Addr
both default to src-mac
3550 default settings
per the doc cd if you leave the 3550 on default src-mac it also load
balances based on ipv4 destination ip address... and I quote...
"When src-mac is used, load distribution based on the source and destination
IP address is also enabled. For all IP traffic being routed, the switch
chooses a port for transmission based on the source and destination IP
address. Packets between two IP hosts always use the same port for packet
transmission, but packets between any other pair of hosts might use a
different transmission port."
3560 default settings
I have not had a chance to capture traffic from my 3560's incoming port
channel physical member interfaces separately yet to see if they also load
balance based on source and destination ip address with default src-mac load
balancing, like the 3550's but with the other modes I doubt it.
-Joe
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Radioactive Frog
Sent: Saturday, November 03, 2007 11:55 PM
To: Rich Collins
Cc: Roman Rodichev; groupstudy
Subject: Re: Basics- Etherchannel load-balancing
How about mixing 3550's and 3560's on each side?
-----------------------------------------------------------
The basic theory of etherchannel:
there are 2 protocol standard in etherchannel - PAgP and LACP.
PAGP is cisco properietary , therefore if you configure switch to use PAgP,
both switch must be Cisco make. No matter what model i.e. 3550 or 3660 or
65xx. All works okay.
LACP is a Ieee802.3ad standard. Therefore any make any vendor/module doesn't
matter.
So you can plugin one end Cisco switch and other end Cisco.
Cisco----4port trunk--------HP-sw
I have personally tested it and it is working in production environment.
a good reading:
http://www.cisco.com/en/US/products/hw/switches/ps5023/products_configuratio
n_example09186a00806cb982.shtml
HTH
frog
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