Cisco Systems Policy Based Routing Question

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Subject Author Date
Policy Based Routing Question darktiger 11-13-05
Posted by darktiger on November 13, 2005, 7:38 pm
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Hello,
Firstly, I have searched this group over - but can't find the exact
details.
Here is the situation:
Two ISPs, one gives 12.zzz.xxx.0/24 to us, and the other just gives us
206.yy.xxx.30. I want all traffic from our network that has a private
IP to be NAT/PAT'ed out the port with the single IP & the people with
public IPs to go out the port with the /24 subnet/

I have a Cisco 3640 router connected to a 2950 switch.

Fa0/0 and S0/0 are used for the two ISPs, Fa0/1 is my trunk port with
sub-ints to my switch for VLAN routing, so I have Fa0/1.10, .20, .30,
etc...

Now, where do I place my: ip policy route-map?

On Fa0/1 or on each Fa0/1.nn?

Thanks! I have never used route maps before...


Posted by Merv on November 13, 2005, 7:46 pm
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policy-based routing is enabled on router ingress interfaces


Posted by darktiger on November 13, 2005, 7:52 pm
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Ingress interfaces would be Fa0/0 and S0/0 which are connected to my
ISP's, correct?


Posted by Maarten Carels on November 14, 2005, 4:27 am
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> Ingress interfaces would be Fa0/0 and S0/0 which are connected to my
> ISP's, correct?
No, Ingress means where the traffic to be policy routed origins from.
So your Fa0/1.* (all of them)

(If you think what policy routing does, it makes sense).

--maarten

Posted by Merv on November 14, 2005, 7:06 am
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You would place the policy on the routers FA0/1.n which are the ingress
interfaces for your outbound traffic to your ISP's.


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