I recently lost my network guy and have a situation where I could use some advice...I have a new construction site where AT&T dropped the ball and they will not have necessary circuit construction completed on time for my location open date. I'm exploring my options and I'm looking at a Comcast fiber link for the location. My entire WAN is on a AT&T MPLS private network... I'm trying to understand how this would work using a secondary vendor/circuit... Comcast can deliver a layer 2 Ethernet connection (over fiber) from my new site to my "hub" data center (they already have fiber terminated at this multi tenant facility)... Would the router install/configuration at my remote site be just about like my standard AT&T setups ? What would be needed at my hub site, just an additional router to terminate this new circuit into ?

This post was edited on 6/11/14 at 10:08 am

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Posted by XanderCrews

Member since Mar 2009

774 posts

Posted on 6/11/14 at 11:49 am to Zilla

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This post was edited on 12/21/21 at 10:00 am

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Posted by MikeBRLA

Baton Rouge

Member since Jun 2005

16456 posts

Posted on 6/11/14 at 12:55 pm to XanderCrews

quote:
If they are handing you a layer 2 metro at the location you would need a switch and that is it. It would look like an uplink to another floor in your building.

True. But just bc the new circuit is capable of layer 2 you can put layer 3 interfaces on either end an route traffic across it from my experience.

Without knowing what type of gear you currently have it's hard to say what your options are.

For example if you have layer 3 switches at either end you could just change the switchports to layer 3 interfaces on either end and route across them. You'd be limited in the QoS queuing you could do using layer 3 switches but that might not be an issue for you.

Personally I'd like to have a remote site in its own network (ie routed) rather than switched.

Again, knowing the type of gear you have would be helpful.

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Posted by ocgator

Anahiem CA

Member since May 2014

12 posts

Posted on 6/11/14 at 3:33 pm to MikeBRLA

quote:
Comcast can deliver a layer 2 Ethernet connection (over fiber) from my new site to my "hub" data center

If you can get a layer two circuit to your DC and it's part of the WAN\MPLS just use a vlan across those two. Setup a /30 and maybe run EIGRP\OSPF depending on your equipment and the size of your network. If the VLANs you need the location to see is small you can just do static routes. Or even still you can route all traffic across the layer2 and them push your internet out of the DC too. A lot of options if you are getting a Layer 2 circuit. Think of it as nothing more then a network cable to a IDF within the same building.

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Posted by LSUDropout

Member since Oct 2009

2023 posts

Posted on 6/11/14 at 4:01 pm to Zilla

This is a difficult question to answer without having a bit more information about your current setup/topology.

Can you past in a config of either your "hub" router, or an already configured "remote" router? If so, just be sure to scrub any private information....

ETA: Really only need an interface config from a remote router(interface which connects to the WAN), an interface config from the "Hub" router which connects to a remote site. Not the whole config...

This post was edited on 6/11/14 at 4:12 pm

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Posted by MikeBRLA

Baton Rouge

Member since Jun 2005

16456 posts

Posted on 6/12/14 at 6:31 am to ocgator

quote:
Think of it as nothing more than a network cable to a IDF within the same building

Exactly, that is what is so cool about layer 2 circuits. As far as you are concerned the two ends are right next to one another (although on a slower connection than you'd have if they were physically on a LAN). With that in mind you might need to consider QoS depending on how you are going to use the circuit so you don't oversubscribe the circuit.

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