as an example of why you might decide to go out on the PBR limb...<div><br></div><div>in a company's network, you may have:</div><div><br></div><div><br></div><div>a network edge (foundry) with servers with lots of data on them</div>
<div><br></div><div>-- a distribution layer (foundry)</div><div><br></div><div>---- a core layer (foundry)</div><div><br></div><div>---- a core firewall (vendor X)</div><div><br></div><div>-- a dmz distribution layer (foundry)</div>
<div><br></div><div>a dmz network edge (foundry) with servers with lots of data on them</div><div><div><br></div><div><br></div><div>for most things, this is fine. data is routed through the whole kit and kaboodle.</div>
<div><br></div><div>the core firewall, though, is not capable of 10Gbps (or higher),</div><div><br></div><div>so for *some* traffic - massive file transfers, etc - we want to skip the firewall layer. for this, we'd use PBR on the core layer and on the dmz distribution layer, using a (say) 20Gbps link between the two (configured with a /30 - the far side is the next-hop.) nothing but the selected special traffic is allowed over this 20Gbps link; everything else goes through the firewalls.</div>
<div><br></div><div><br></div><div>for musing.</div><div><br></div><div><br></div><div>n</div><div><br></div><div><div><br><div class="gmail_quote">On Fri, Feb 5, 2010 at 9:56 PM, Randy McAnally <span dir="ltr"><<a href="mailto:rsm@fast-serv.com">rsm@fast-serv.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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<font size="2">That's how I do it.
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<br>--
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Randy
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<br><b>---------- Original Message
-----------</b>
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From: Nick Morrison <<a href="mailto:nick@nick.on.net" target="_blank">nick@nick.on.net</a>>
<br>
To: <a href="mailto:seph@directionless.org" target="_blank">seph@directionless.org</a>
<br>
Cc: foundry-nsp <<a href="mailto:foundry-nsp@puck.nether.net" target="_blank">foundry-nsp@puck.nether.net</a>>
<br>
Sent: Fri, 5 Feb 2010 21:29:33 +0000
<br>
Subject: Re: [f-nsp] Policy based routing?
<br>
<br>> Silly question,
<br>>
<br>> If all you want is an ACL to block
traffic, why not just use an access-group?
<br>>
<br>> N
<br></div><b>l Message
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</font>
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</blockquote></div><br><br clear="all"><br>-- <br>Nick Morrison <<a href="mailto:nick@nick.on.net">nick@nick.on.net</a>><br>
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