WEBVTT

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 This video I want to cover the topic of
 identifying and describing commonly

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 used components that you'll find
 on routers and switches.

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 My name is Keith Bogart and I will be
 your instructor for this session.

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 So in this video, the main sort of
 components, general high categories

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 I want to cover fall
 into three things.

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 Number one, chassis, engines,
 and line cards or modules.

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 In other words, if you're taking a
 look at these various things here,

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 as a CCT, you need to be able to identify
 visually what each one of these

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 things are. You need to be able to
 call them by their correct name.

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 So let's talk about each
 one of these things.

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 So common components.

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 So several components are common
 across routers and switches.

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 We're going to talk about each one of
 these supervisor engines, network

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 modules, all the way down
 to fans and fan trays.

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 So let's start with
 the term of chassis.

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 If someone says, hey, I need you to
 bring me a chassis or the chassis

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 is damaged. What is this
 thing called a chassis?

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 Well, the chassis is typically the
 outer box or casing that holds all

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 the guts of a router or a switch.

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 So here, for example, we see a Cisco
 7604, just the outer chassis.

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 So in all the line cards, if we're
 talking about a router switch that

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 is a modular chassis, once you remove
 all the modules, all the removable

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 stuff is taken out, what you
 have left is your chassis.

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 So that's the outer shell or box that's
 holding everything that has the

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 backplane that things slip into.

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 That's what we mean
 by the chassis.

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 Now sometimes you'll have cases that
 come in or something you'll have

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 to troubleshoot How do
 you look for that?

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 Fans come into several
 different form factors.

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 We can see here on a Cisco 2821, we
 have a fan here on a Nexus 2000.

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 We also have a fan.

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 So they look very different
 from each other.

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 So sometimes you might have to remove
 or replace an individual fan that

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 will look something like this.

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 On some of the higher end units that
 generate a lot of heat, you will

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 have multiple fans and those many different
 fans will be encased and neither

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 what's called a fan module
 or a fan tray.

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 A fan module and a fan tray are basically
 two words for the exact same

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 thing. It's a housing or a unit
 that contains multiple fans.

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 Now how would you install a fan?

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 Well that really depends on what platform
 that you're dealing with.

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 Fans typically reside in some kind of
 removable casing that we've talked

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 about called a tray or a module.

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 And what you're really going to need to
 do is look at the hardware installation

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 guide for your model to determine the
 location of where this tray is for

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 removal purposes.

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 Because you can see here it could be
 on the front, it could be on the

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 side, on the back.

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 You really don't know until you look
 at the hardware installation guide

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 for your particular
 router or switch.

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 Make sure you don't pull
 out the wrong thing.

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 Now another common component is something
 called engines and there's lots

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 of different engines in chassis.

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 The engine is basically the
 brains of the device.

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 If you don't have some kind of an engine,
 you don't have anything running

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 software. You don't have anything that's
 able to look at your packets

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 and your frames and know
 what to do with them.

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 And engines come in
 different names.

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 You could have supervisor engines, network
 processing engines or service

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 performance engines.

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 So let's start with the service.

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 Let's start with a
 supervisor engine.

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 What is that? Supervisors or supervisor
 engines are the brains of your

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 switches. So switches that are modular
 switches will have supervisor engines

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 in them. It can be located in various
 slots on the switch, various slots

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 on the chassis. So you'll need to be aware
 of, okay, what type of supervisor

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 engine am I looking for and what type
 of chassis am I dealing with?

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 But not always. Sometimes
 it's in slot five.

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 Sometimes it's in slot six.

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 So really you need to be aware of what
 chassis you're dealing with and

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 what model of supervisor you're dealing
 with and that will help you to

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 identify what slot it's in.

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 However, one thing that is typically
 common is that on supervisors, you'll

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 have a console port.

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 So if you're looking at the front of
 a modular switch and you're looking

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 at all the different line cards or
 modules on it, if you can identify

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 the one that has a console port on
 it, that is your supervisor engine.

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 Now what other types of engines might
 you find, for example, on routers?

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 Well, for example, you might have what's
 called a network processing engine

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 or an NPE. Here we have two examples
 of NPEs you can put into a Cisco

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 7200 series router.

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 Another type of engine you might have is
 something called a service performance

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 engine. And that's what we see
 here is our third image.

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 This is an SPE for a
 3,900 series router.

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 Once again, you're looking for the thing
 that has a console port on it.

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 All three of these have console interfaces
 because this is the guts or

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 the brains of the router.

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 Without an NPE for a 7200 or without
 an SPE for a 3,900, the device just

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 won't work. It doesn't
 have a brain.

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 Okay, how do I identify line
 cards, modules and adapters?

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 Well, network interfaces, right, are serial
 interfaces, our Ethernet interfaces

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 are typically located on either the physical
 chassis itself or on removable

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 cards. Now, if it's on a removable
 card, that removable card can go by

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 lots of different names.

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 We could call it a line card, a network
 module, a port adapter, a service

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 module, a WIC, an electronic
 test, but a laptop network.

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 So, what are all these
 different things?

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 Well, let's start with
 the term line card.

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 A line card is the removable media
 that you find on a switch.

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 So your ports on your switches are typically
 contained if they're contained

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 on removable media, that removable
 media will be called a line card.

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 Where are some typical characteristics
 of a line card?

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 Well, number one, they
 reside on switches.

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 When we're talking about a router, we
 don't really say I'm removing the

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 line card on my router.

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 You wouldn't say that.

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 You'd say I'm removing or swapping
 the line card on my switch.

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 Also, they span the entire width
 of the switch chassis.

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 They're very long.

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 Usually they're not hot swappable.


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 In other words, we got to power off
 or power down the switch if we're

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 going to pull it out
 or put a new one in.

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 And they're typically made only
 for specific models of switches.

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 For example, the line card made for
 a catalyst 4,500 switch isn't going

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 to fit. It's not going to work.

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 In your catalyst 6,500 or your Nexus
 switch, they're not interchangeable.

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 All right, let's move
 on to the routers.

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 What are those small removable
 things in your routers called?

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 Well, it really depends on the chassis
 of the router that we're dealing

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 with. Here's an example.

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 We have a Cisco 7200
 series router.

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 So the smaller slots on the top,
 doesn't need by number one here.

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 These are called port
 adapter slots.

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 So port adapters would go in here.


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 The larger slot that spans the entire
 width of the chassis, this is a

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 slot for what's called a controller
 or an input-output controller.

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 Now, that's because we're
 dealing with the 7200.

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 If we're dealing with a different chassis,
 for example, the Cisco 4451.

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 Here, we have some empty
 slots on the top.

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 They're smaller.

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 But we don't say that port
 adapters go in here.

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 In a 4451, these hold what's called
 NIMS or Network Interface modules.

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 So these are NIMS slots.

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 The largest slot on the bottom here,
 this does not hold a controller.

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 On a 4451, these larger slots hold what's
 called ESMs or Enhanced Service

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 modules. Now, let's contrast
 that with another router.

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 Here, we have a 2611
 router, a Cisco 2611.

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 Notice, both of them
 have smaller slots.

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 We've got some smaller slots here and
 we've got some smaller slots here.

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 However, these smaller slots, like I
 said, hold Network Interface modules

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 on the 2611. They hold what's called
 Wix, way and interface cards.

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 Here, we have a larger slot.

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 Well, that's holding an Enhanced Service
 module, but down here, this is

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 holding a Network module.

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 So the names change depending on what
 flavor of chassis we're looking

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 at. Now, in addition to Network modules
 and port adapters and Wix, you're

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 also going to have something
 called Service modules.

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 And here you can see some examples
 of some Service modules.

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 So what is the Service module?

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 Well, it used to be.

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 The Service module could be classified
 or categorized as something that

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 supported a particular service feature
 other than transport media line

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 termination. What do I mean
 by transport media?

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 Line termination will align as like
 a cable, like a fiber optic cable,

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 or a copper cable,
 or a serial cable.

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 So a copper cable would be something
 that's transporting media.

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 A fiber optic cable is
 transporting media.

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 Well, a Service module would not typically
 connect to those things.

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 A Service module is something that provides
 a service or a feature that's

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 probably already available in software
 on your device, but the software

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 feature is not going to be activated
 until you plug in the particular

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 hardware element, the Service module
 that will activate that.

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 For example, firewall services or encryption
 services or wireless controller

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 services. So now, however, it seems
 like Service modules are starting

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 to replace Network modules.

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 So it's really just a terminology
 difference.

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 So Service modules, a lot of times, are
 not visually distinguishable from

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 Network modules based on their form factor
 other than the fact that Service

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 modules, usually not always, won't
 have any physical ports on them.

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 So if you have a module, a smaller module
 that's got LEDs on it that are

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 blanking, it doesn't have any physical
 interfaces or ports on it, what

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 you're looking at is most likely
 what's called a Service module.

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 So here's how it really
 breaks down.

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 On your smaller slots, on your routers,
 your smaller slots will typically

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 hold Wix, which are WAN interface cards,
 or high speed Wix, or voice Wix.

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 Your medium size slots, that's where
 you're typically going to find your

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 port adapters or network interface
 modules and your largest slots.

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 That's where you're going to have your
 network modules, your network module

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 enhanced, or enhanced network modules,
 your controllers, or your service