topic Re: Tagged subinterfaces configuration on L3 mode in General Topics

Tagged subinterfaces configuration on L3 mode

RCHAIBI — Tue, 25 Aug 2015 08:32:26 GMT

hello;

we work on our organisation to do the migration of the configuration from another firewall to the palo lato networks PA-500 . With the recent architecture the segmentation of the networks is in the switch . But now , we like to do this segmentation in the PA-500 by creation of subinterfaces . we like to do like show the screenshot : a router of trafic from inside to outside that a second router from vlan 10 to inside than another router from vlan 20 to inside . The interface eth1/2 is related with a truk port configured on the switch with tagged vlan 10 and vlan 20.

The problem that the traffic not passe to the subinterfaces! Please correct me if there is any mistake that i make it in my configuration.

Thank you!

Re: Tagged subinterfaces configuration on L3 mode

santonic — Tue, 25 Aug 2015 09:16:40 GMT

You're proably missing VLAN 1 on trunk between switch and PA.

Besides you're speaking of different (virtual) routers and you have only 1 for all interfaces (vr_vsys1). But that shouldn't be a problem, in fact that should make your life easier.

Hard to tell much more without seeing all configuration and rules.

Re: Tagged subinterfaces configuration on L3 mode

pulukas — Tue, 25 Aug 2015 10:41:04 GMT

Do you also have the security policies setup betwee zones vlan10 to inside; vlan20 to inside; and inside to outside.

You will also need a NAT policy for inside to outside.

Re: Tagged subinterfaces configuration on L3 mode

katavag — Thu, 27 Aug 2015 11:25:15 GMT

What kind of switch do you use?

Is L2 connection brought up?

I notice you are using default management profile on all interfaces. Normaly I would use profile that allows ping only on such interfaces.

Can you ping PA interfaces from switch or laptop connected to one of the switch ports?

If answer is positive to all this, then you will need to have permissive security policy that allows traffic to flow between the zones.

Re: Tagged subinterfaces configuration on L3 mode

OtakarKlier — Thu, 27 Aug 2015 16:04:29 GMT

Hello,

I ahve done this and it works really well for me. Not saying its the only way of doing it but for my proposes it works.

Make the interfaces and subinterfaces layer2

Create layer 3 vlans for the ones that are trunked

Create a zone for each vlan (make sure to add all the rules and nats that you need)

I use it because it allwos me to control traffic between the vlans, kind of like a collapsed DMZ.

Also if you have a DENY ALL rule at the bottom, it will not allow intrazone traffice so you would need a rule to allow it, i.e. trust<->trust allow.

Hope this helps!

Re: Tagged subinterfaces configuration on L3 mode

RCHAIBI — Wed, 02 Sep 2015 15:38:31 GMT

Hello;

Thank you very much for all the respenses. It's ok , the configuration now work in Layer 3 by adding a Nat rules in the Palo Alto Networks from a vlan to outside.

I really appreciate all your helps

Thank you!