Grrrrrrrrrrrr and Double Grrrrrrrrrrrrrrrrr
We have been fighting with what looks like
a new FEC bug and we isolated packet loss
to clean FEC trunks. However the packet
loss pattern followed IP pairs not MAC
pairs. The penny now drops !
Regards,
Kevin
-----Original Message-----
From: David Sinn [mailto:dsinn@microsoft.com]
Sent: 21 November 2001 19:20
To: Kevin Gannon; Dmitri Kalintsev; cisco-nsp@puck.nether.net
Subject: RE: [nsp] two interfaces on the same LAN with same subnet
Yes:
set port channel all distribution {ip | mac} [source | destination |
both]
David
> -----Original Message-----
> From: Kevin Gannon [mailto:kgannon@lancomms.ie]
> Sent: Wednesday, November 21, 2001 11:00 AM
> To: David Sinn; Dmitri Kalintsev; cisco-nsp@puck.nether.net
> Subject: RE: [nsp] two interfaces on the same LAN with same subnet
>
>
> Can anyone confirm if the 4000's have to feature ?
>
> Regards,
> Kevin
>
> -----Original Message-----
> From: David Sinn [mailto:dsinn@microsoft.com]
> Sent: 21 November 2001 18:47
> To: Dmitri Kalintsev; cisco-nsp@puck.nether.net
> Subject: RE: [nsp] two interfaces on the same LAN with same subnet
>
>
> This is only true of the early implementations of etherchannel in
> switches (Cat5k series). The 6500 series will do EtherChannel
> frame-distribution based on source/dest IP address, or MAC,
> depending on
> your config. IP is the default, but you can revert to MAC if you need
> for consistency sake.
>
> David
>
> > -----Original Message-----
> > From: Dmitri Kalintsev [mailto:dek@hades.uz]
> > Sent: Tuesday, November 20, 2001 3:14 PM
> > To: cisco-nsp@puck.nether.net
> > Subject: Re: [nsp] two interfaces on the same LAN with same subnet
> >
> >
> > On Tue, Nov 20, 2001 at 04:22:17PM -0500, Yuval Ben-Ari wrote:
> > > Niels,
> > > According to following URL what you are saying is not
> configurable:
> > >
> > http://www.cisco.com/univercd/cc/td/doc/product/lan/cat5000/re
> l_6_2/_con
> > fig/channel.htm#23937
> >
> > "EtherChannel distributes frames across the links in a channel based
> on
> > the low-order bits of the source and destination Media
> Access Control
> > (MAC) addresses of each frame. The frame distribution method is not
> > configurable."
> >
> > It is possible, however, to manipulate MAC addresses.
>
> FYI: etherchannel on *router* side would load-balance based on hash of
> source/dest _IP_ address. It implies that if you run etherchannel
> between
> router and a switch (we're talking Cisco here), and most of
> the traffic
> heading into router would be coming from one layer2 point
> (say, gateway
> router), it will occupy one of etherchannel links, but return traffic
> (from
> router into switch) will load-balance. ;) Extremely useless. ;)
>
> SY,
> --
> CCNP, CCDP (R&S) Dmitri E. Kalintsev
> CDPlayer@irc Network Architect @ connect.com.au
> dek @ connect.com.au phone: +61 3 9674 3913 fax: 9251 3666
> http://-UNAVAIL- UIN:7150410 cell: +61 414 821 382
>
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