On 22/12/2009 00:46, Mel Flynn wrote:
On Monday 21 December 2009 09:56:11 Nikos Vassiliadis wrote:
On 12/21/2009 6:03 AM, Mel Flynn wrote:
Hi,
I've looked over http://www.openbsd.org/faq/pf/pools.html but this
assumes two different gateways for the two interfaces.
I'm faced with two cable modems from the same ISP, with the same gateway.
I can't lagg(4) the interfaces, since specific IP's are bound to specific
modems.
This can probably be fixed from the ISP side. It should probably be some
antispoofing rule that drops the packets you are sending via the "wrong"
interface. You could try communicating the problem to the ISP and hope for
the best...
I'd rather not go that route. However, I might ask the ISP to move swap two
IP's, so that I have two consecutive IPs on two modems and can use /31
notation for the pool. Source hash should then work better.
So I'm wondering if using stick-address with a round-robin nat pool is
really sufficient to do load balancing of outgoing traffic and not get
into session problems with various protocols. Has anybody had similar
experiences?
I have no experience on this, but theoretically a state can expire while
the upper layers are still active... so, I *think* you may have
problems... Of course, you could increase the lifetime of states
True, I'm mostly worried about DNS queries and other UDP protocols. TCP should
theoretically be fine.
Thanks for your feedback.
Would ECMP (aka RADIX_MPATH) not be suitable for your requirements ?? 2
default routes, one to each of the modems IP's ... that should start
bunting traffic down both pipes.
Works for me here...
=================================================
Equal cost multipath routing
Status: Committed to 8-CURRENT
Will appear in 8.0: sure
Authors: Qing Li
Web: commit message
ECMP routing allows for multiple routes to be handled by the kernel,
including default routes. It potentially offers substantial increases in
bandwidth by load-balancing traffic over multiple paths.
=================================================
http://en.wikipedia.org/wiki/Equal-cost_multi-path_routing
http://lists.freebsd.org/pipermail/cvs-src/2008-April/089956.html
/Craig B
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