[stable-9]

[Li, Qing]

Yes, you are right, I should have paid closer attention to the output, however, what
I replied still apply to RADIX_MPATH in general.

Now, when I first introduced RADIX_MPATH, to get the (not always even) general load 
balancing among interfaces attached to the same prefix, you only need to add the following
additional host routes, as in:

  route add -host gateway-ip -interface igb0
  route add -host gateway-ip -interface igb1

However, I just realized that strategy no longer work after the ARP entries are maintained 
separately from the general routing table.

Let me think it through and try to come up with a patch.

--Qing

________________________________________
From: owner-freebsd-net at freebsd.org [owner-freebsd-net at freebsd.org] on behalf of David DeSimone [fox at verio.net]
Sent: Tuesday, May 15, 2012 4:14 PM
To: freebsd-net at freebsd.org
Subject: Re: [stable-9]

Li, Qing <qing.li at bluecoat.com> wrote:
>
> The route selection is based on a hash function of source-ip and
> destination-ip when RADIX_MPATH is enabled. You do not need to perform
> specific actions, other than perhaps setting varying weights on each
> entry as an option. So depends on the traffic destination the chosen
> route may always be the same one.

These comments suggest that there are multiple routes to be selected
from.  However, this output:

> Internet:
> Destination        Gateway            Flags    Refs      Use  Netif
> Expire
> default            <redacted>         UGS         0 33320033   igb0
> XXX.XXX.XXX.0/25    link#1             U           0        0   igb0 =>
> XXX.XXX.XXX.0/25    link#2             U           0        0   igb1

suggests that there is only ONE default route, pointing to ONE
interface, igb0.  Without an extra default route that is also pointing
to igb1, I can't see how the system woudl ever forward traffic out igb1,
unless it was directed to the local /25.

--
David DeSimone == Network Admin == fox at verio.net
  "I don't like spinach, and I'm glad I don't, because if I
   liked it I'd eat it, and I just hate it." -- Clarence Darrow


This email message is intended for the use of the person to whom it has been sent, and may contain information that is confidential or legally protected. If you are not the intended recipient or have received this message in error, you are not authorized to copy, distribute, or otherwise use this message or its attachments. Please notify the sender immediately by return e-mail and permanently delete this message and any attachments. Verio, Inc. makes no warranty that this email is error or virus free.  Thank you.
_______________________________________________
freebsd-net at freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-net
To unsubscribe, send any mail to "freebsd-net-unsubscribe at freebsd.org"