From: Joseph Saad (joseph.samir.saad@gmail.com)
Date: Wed Nov 28 2007 - 15:43:21 ART
I tend to agree except to the part where the port of choice is based on the
source IP address while routing.
On Nov 28, 2007 8:20 AM, Calil Zorby <zorby@doglover.com> wrote:
> Alex,
>
> "...for all IP traffic being routed..." the SW "...chooses a port for
> transmission based on the source and destination IP
> address..."
>
> But, for traffic being switched, it will use the src-mac, by default.
>
> Anyone correct me if I am wrong.
>
> thanks
>
>
> -----Original Message-----
> From: Alex Steer [mailto:alex.steer@xxxxxxxxxxx]
> Sent: Sunday, November 04, 2007 4:58 AM
> To: Joseph Brunner; Radioactive Frog; Rich Collins
> Cc: Roman Rodichev; groupstudy
> Subject: RE: Basics- Etherchannel load-balancing
>
> That's very interesting.
>
> It's also very misleading. Why call it src-mac if its actually
> src-mac-src-dst-ip. I wonder if the proctors are aware of that? I
> think I wouldn't trust that just in case the person marking my exam
> isn't aware (no ones perfect, apart from me).
> -----Original Message-----
> From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of
> Joseph Brunner
> Sent: 04 November 2007 06:13
> To: 'Radioactive Frog'; 'Rich Collins'
> Cc: 'Roman Rodichev'; 'groupstudy'
> Subject: RE: Basics- Etherchannel load-balancing
>
> 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@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] 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_configur
> atio
> n_example09186a00806cb982.shtml
>
> HTH
>
> frog
>
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