Default Gateways !!

[omer_babiker]

Hi,

Please refer to the attached diagram.

Currently, my network connected to the switch and then to firewall and then to the internet.

Recently, some PCs of the same network need to access a new private MPLS network. To accomplish our needs, I need a direct connection from the switch to the MPLS router. In this case we will be having 2 default gateways in the switch; right?  will that be a valid design? what config should I do?

Please share your ideas.

Thanks,

[kcnajaf]

Hi Omer,

What model of switch you have there? Is that a Layer 2 switch? Ideally you should have a L3 switch there which will route the traffic based on the destination.

As far as i know you can not have a two default gateways on switch :-)

Hope that helps

Regards

Najaf

[omer_babiker]

Hi Najaf,

Thanks for your response.

It's L2 switch.

What if I assigned different VLANs! Will that make any difference?

Regards,

[shivjain]

Hi Omer

The few PCs which are you talking about will access the only MPLS network or they will access the internet too.

If those PCs will access the MPLS network only, in that case probably you could use one more network like 192.168.10.0/24 for those PC and add them in VLAN 100 (example use any vlan). Now you need to configure the port as trunk netween your router and switch and have to create a one sub interface. The reverse routes need to be added in the MPLS network too.

If PCs wants to communicate with Internet also, during that case you need to reroute the traffic towards firewall by putting default route.

regards

shivlu jain

http://www.mplsvpn.info

[kcnajaf]

Hi Omer,

Assigning new VLAN will help depending on the requirement. Does the few PC's which require access to MPLS requires to access Internet as well? Or is it just they need access only to MPLS network?

Regards

Najaf

[Joseph W. Doherty]

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Posting

Normally, you would not have more than one default gateway unless both route alike.

From what you've described, what may work for you is to make the new R1 router the default gateway and on it have a default route to the FW.