Enterprise Network Overview

this is at Gastel we're here to interrupt net in New York City 2011 and just going to explain a little bit about the network here at Interop net going to go through a once look at it from an internet internet perspective and then we're going to go through it again and look at it from a traditional enterprise perspective so we're going to use this as an example network really to give a better idea as to what an enterprise network looks like so the first time through look at it from how Interop net is set up so there's the internet that's connected to two through two these two colocation facilities in Denver and in Newark there's multiple ipv4 and single ipv6 links out to the internet from those colocation facilities that are also connected together by giggy links we have Giggy wham links coming down here so everything from this bottom part of the screen is is here in New York City at the convention center so when these Giggy wham links first come in through the LAN provider they immediately go through a firewall that protects everything down here from hackers from the outside world so the lengths facing Denver after the firewall gets terminated into a Cisco core router that we'll look at here in a little bit from Newark gets terminated into an HP core core router those core routers are connected together by multiple 10 gig links so that traffic can flow across them from HP HP manages what's called the off show floor so all the speaking rooms all the presentation rooms media rooms things of that nature so from that HP core router it goes off into these access switches and just down here I've drawn an example that from one access which we would go out to multiple devices so this could be a speaker's laptop for example in one of the in one of the training rooms the Cisco feeds all the show floor so all the boots that are out in this in this show they have gigabit ethernet links dropped to them so from that Cisco course which there are 10 gig Ethernet links going out to all the access switches and then from the access switches we have one gig links going out to all the boots which are the clients are terminated there these 10 gig links here in New York these are all copper based links so that's kind of what Interop net looks like and now we're just going to do the same thing but we're going to look at it more from a traditional Enterprise what would that look like because this is going to be the office in a traditional Enterprise so you've got the internet you've got these facilities here in a traditional enterprise network these could be your your data centers and you could find within them storage area networks could be within those facilities so you could have all your storage in in these places so those data centers are going to been get connected through LAN links and could be very easily GigE LAN links down into the office building so this is really what you're going to find in an office building in most cases where you don't have a data center you're going to see multiple core routers and it could be that this is one building this is another building in a campus environment and then these access switches are most likely going to be individual floors within that office space so from your core router you're going to have these riser cables that are going up to the various floors so floor 1 2 3 4 5 kind of idea and then within each individual floor you would feed off into all the workstations of all the people that work on that floor so you know 48 ports which going to speed 48 different workstations on that floor so that's really what it looks like for a traditional enterprise perspective so now what we're going to do is we're going to go out we're going to look at what these actually look like in real life so here we are at the fire wall this pedestal of this rock here is the fire wall so you can see down here the two links coming in from Newark and coming in from Denver feed into these switches which then have VLANs across into the firewall and then these links then will go off to the HP into the Cisco core devices so right next to the firewall we have the HP core racks and you can see there's many things there's some f5 for for some security there's a gigamon for some popping we actually have a top off the gigamon so that we can monitor traffic but here's the HP course core router there's two of them that are connected together two for redundancy pretty typical of core routing because we only have one gigabit ethernet link that comes into these four devices the other one goes into the Cisco you can see that that connects right in here to the first rack the external so those are the LAN links coming in this is everything you take this off there's no connection now to the outside world and then from here inside of the router you've got these multiple subnets that are feeding off into each of the individual access switches and the access switches will then feed out into the individual workstations in this case of interrupt it's feeding off into the individual classrooms and that's essentially what a core router is going to do is just aggregating its you're bringing in your outside links and then you're feeding them off and all your distribution and access devices so that you can just break down and down and down and down until you get to an individual desktop so here we are at the Cisco core router there's two of them for redundancy whereas HP had two separate racks we've now got two completely duplicated routers but in the same rack different power systems but it's for redundancy but just as with the HP we've got a single external interface comes in this is facing the Denver location so this would be one of the two LAN links that would be into an enterprise it's actually connected through some ribbon fibers that are up here that really not going to go through that too much so these this comes in into the router and then we want to feed off into five individual distribution or access switches in this case you're doing that by ten gig links so each one of these cables on this Cisco blade these are ten giggling coppers with ng base T links at the sixteen port device each one is its own individual IP subnet and again redundancy so the blue and the yellow so in order to serve out to all the distribution or access switches there is a blade in here in the Cisco router that's got 16 10g bastey ports on it we are only using five so really under utilizing the capacity of this this router in this particular situation but you could think of this is serving 16 different floors of an office building so again 10g based II links are going off you've got the blue cables as the primary you got yellows as a secondary so that from the core routers you've got duplicate links going off into each of the individual access racks so that if something were to happen to this blade or to this router then you'd have another one each one of these individual ports represents a specific IP subnet or more because there's VLAN trunking on each of these cables as well so multiple IP subnets on each chord and 16 different individual connections that you can have so what we're going to do now is we're going to look at how these cables that are terminated in the front of the device end up getting all the way out to the individual devices in the individual switching locations the distribution and access switches and for that we need to go to the back of the rack okay so here we are at the back of the rack and you can see all the cables coming out to out to the back so this is the the blue and the yellow that's your main and your secondary along here and then from here this is a structured cable system this could be horizontal or it could be a riser type cable so 10 gig links the category 6a cables they come in to the back of the patch panel or sorry in to the front of the patch panel and then on the back of the patch panel everything is punched down and then the cables will run out up to a hundred meters and you can see them kind of going up in this case and off but this would be in a typical office environment those cables those horizontal cables would then go out and they would terminate into each of the individual racks that's going to be for the access switches those cat6a cables are now coming into this rack which is an access rack that's going to serve individual workstations so that comes in and it comes to the back of the patch panel so it's a mirror image exactly of what we saw before but now instead of having five we've only got one because there's five racks like this in this particular network there could be as we saw with a 16 ports which there could be up to 16 so on the back side we've got our cables plugged in punch down onto the back now we've got our patch panels that are going to go to the front and plug into our access switches so here we have as we saw on the back there's the blue cable primary the yellow for secondary 10 gig II links that are going through all those patch panels all that cabling and eventually you're plugging into that blade on the Cisco switch that we looked at earlier so we've got an individual subnet coming in to this to this rack then from these 10 gig links where we have in the uplink ports we then have on each switch 48 ports of 10 100 gig Ethernet that needs to eventually get out to an individual workstation or here at Interop net out to an individual booth the way that it does that is through these patch cords that connect from the switch itself up through to a patch panel which is at typically at the top of the rack so here at the patch panel what we have is we're plugged into the front of the patch panel from the switch and then on the back of the patch panel we have all of our horizontal cabling now instead of being cat6a like our 10 gig needed to be these are cat5e cables that are going out and are serving individual workstations so if you think of yourself sitting at a desk and you've got an rj45 outlet next to it you're eventually going to be connected through all this horizontal cable through a patch cord into the switch through the 10 gig links back to the core device and then up through the LAN links that we saw to the Internet so what we just saw was the access switch and from the access switch through patch cords into a patch panel then across the horizontal cable here at interrupt net that terminates into this rj45 that when the people come into the booths they can plug this into their PC directly and they have access to the Internet in a normal enterprise network what that would be is the rj45 wall plate that would be at your booth be in the conference room being your cubicle those types of things that you'd plug a patch cord into and then connect it into your computer to give you access to the network so what we've seen here throughout the all these things take it from this location here at very end it's going to be into a computer through all the cabling horizontal cabling patch cabling into an access switch from the access switch across the higher-speed links in this case 10 gig links into a core or distribution router and then from there you have your links to your external devices so that could be data centers it could be the internet it could be another office all those types of things so that gives you an overall good picture of what an enterprise looks like all the way from the computer through out into the Internet

Channel: Ed Gastle

Views: 60,035

Rating: 4.9224806 out of 5

Keywords: Enterprise, networking, testing, certification

Id: 7tJKR6z0uW8

Length: 12min 28sec (748 seconds)

Published: Wed May 29 2013