Ethernet is the Technology which is Best Situated to LAN, Ethernet has all Features which LAN Need Like High Bandwidth cost Of Deployement,and Coverage Where as Serial Technology, is Best Situated for MAN and WAN, they received data in packet and transmit to long distance they have Control Signal Also who Safe. 1 NMP = Network Management Processor. 2 L3 = Layer 3. Understand Interfaces in Cisco IOS System Software Interface (Port) Modes in Cisco IOS Software.

Cisco CCNA Configuring Router Interfaces ( Chaoter 2 Contd) In this section you will learn how to configure interfaces on a Cisco router. Cisco CCNA Configuring an Interface The type of interface includes things such as serial, ethernet, fastethernet, gigabitethernet, atm, tunnel, loopback, etc. The number, slot/number and module/slot/number are numbers used to uniquely identify an interface on different types of routers. Cisco CCNA Configuring an Interface Some of the configurations used to configure an interface are Network layer addresses (IP Addresses), media type, bandwidth, and other administrator commands. Different routers use different methods to choose the interfaces used on them.

Most of today’s routers are modular, the configuration would be “interface type slot/port” or “interface type module/slot/port”. An example of configuring a fastethernet interface with some possible options is as follows: interface fastethernet 0/0 ip address 192.168.1.1 255.255.255.0 Cisco CCNA Configuring IP Addresses Even though you don’t have to use IP on your routers, it’s most often what people use. To configure IP addresses on an interface, use the ip address command from interface configuration mode. Note: The command “ ip address. ” starts the IP processing on the interface. Remember interfaces are administratively shutdown by default so you will need to perform a “ no shutdown” for the interface to come up. Cisco CCNA Serial Interface Clocking Cisco CCNA Serial interfaces will usually be attached to a CSU/DSU type of device that provides clocking for the line.

But if you have a back-to-back configuration (for example, one that’s used in a lab/classroom environment), on one end—the data communication equipment (DCE) end of the cable—must provide clocking. The type of cable plugged into the serial interface can be verified by performing ‘ show controller’ command. The clock present is representative of the cable plugged in (Data Terminal Equipment (DTE) or DCE). If it’s DCE, the ‘ clock rate’ command will be needed in a back to back configuration.

Cisco CCNA Configuring a Serial Interface By default, Cisco routers are all data terminal equipment (DTE) devices, so you must tell an interface to provide clocking if you need it to act like a DCE device. You configure a DCE serial interface with the clock rate command. The “ show controllers command” displays information about the physical interface itself.

It will also give you the type of serial cable plugged into a serial port. Usually, this will only be a DTE cable that plugs into a type of data service unit (DSU). R1# show controllers serial 0/0 Hd unit 0, idb = 0x121c04, driver structure at 0x127078 Buffer size 1524, hd unit 0, v.35 DCE cable The bandwidth and delay of an interface is used by routing protocols such as IGRP, EIGRP, and OSPF to calculate the best cost (path) to a remote network.

So if you’re using RIP routing, then the bandwidth or delay setting of an interface is irrelevant, since RIP uses only hop count to determine that. Cisco CCNA Disabling or Enablng an Interface You can mark an interface administratively down with the “ shutdown” command, and turn it on with the “ no shutdown” command. If an interface is shut down, it will display administratively down when using the “ show interface” command.

REMEMBER TO DO A “NO SHUTDOWN” COMMAND WHEN YOU HAVE CONFIGURED A DEVICE.THIS TRIPS UP MANY STUDENTS ON THE SIMULATION PORTION OF THE EXAM. Cisco CCNA Verifying Your Changes The command “ show interface” reveals to us the hardware address (if a LAN interface), logical address, and encapsulation method, as well as statistics.

Maximum Transmission Unit (MTU) shows how many bytes of data can be sent in each encapsulated packet. BW is 1.544kbps by default on serial interfaces, Delay is 20,000 microseconds.

If the link is 100% reliable, the “rely 255/255” will be shown. If the link is basically at no load, the “load 1/255” will be displayed. The encapsulation on a serial interface is HDLC by default. The loopback can be set to test the link and the keepalive is 10 seconds by default. Resident Evil Revelations Trainer Download. This is a Data Link layer keepalive that is sent between routers. Download Livro Game Of Thrones 3 Pdf. If the timers are not exactly the same, the Data Link layer will not come up.

Cisco CCNA Interpreting Interface Status The most important statistic of the show interface command is the output of the line and data-link protocol status. If the output reveals that serial 1/1 is up and the line protocol is up, then the interface is up and running.

The first listed “up” in this example, shows carrier detect from the CSU/DSU. The second “up” in this example shows keepalives from the remote router.

Another thing to confirm is the state of the signals. This is shown at the bottom of the output, and on most serial interfaces can also be seen on the router’s serial interface as a series of green lights. Usually when the router interface is up and normal, all of the signals will show to be up. Cisco CCNA Show IP Interfaces Brief This command is used to get a quick view of the status of all interfaces configured on the router.

The status and protocol fields are quick indicators as to the state of the interface. When you are troubleshooting if you see the status as administratively down, you need to perform a “no shutdown” on the interface to mark it administratively up.

Prior to marking an interface administratively up, confirm that it should be up. Typically for security reasons unused interfaces are administratively marked down. Cisco CCNA Which Issue on the left corresponds to the router output on the right? Answer: Layer 1 problem – Serial 0/1 is down, line protocol is down Layer 2 problem – Serial0/1 is up, line protocol is down Layer 3 problem – no match Port operational – Serial 0/1 is up, line protocol is up Port disabled – Serial 0/1 is administratively down, line protocol is down Cisco CCNA Erasing NVRAM on a Router You can delete the startup-config file by using the “ erase startup-config” command. This command would be recommended if the router was being re-deployed or decommissioned, and you wanted to make sure none of the old configuration elements were present when it either comes back online, or is decommissioned.

Once the configuration is erased, upon reboot of the router, the user will be prompted to enter setup mode as if the router had come from the factory. Setup mode can be utilized to initially configure basic things such as hostname, ip addresses on an interface, etc. If you rather entering initial configurations from regular configuration mode, you can exit out of the setup mode. Note: The “ write erase” command is another command that performs the same function.

Cisco CCNA Draw a line From the left to the answer on the Right. Answers: Enter privileged EXEC mode – >enable Enter global config mode – # configure term Enter interface config mode – (config)# interface fa0/0 Configure the interface IP address – (config-if)# ip address 10.8.26.0 255.255.248.0 Enable the interface – (config-if)# no shutdown.

Newbie question soon to follow! So I was thinking, (yes I know the difference between 10 and 100), but from the IOS standpoint, is anyone aware of feature differences between these two? Here's an example: I'm looking to get an ethernet module for my 3620 because it's much cheaper than a fastethernet module. And for lab purposes, I don't need the speed. BUT, will I be missing out on any special features with fastethernet? Will there be a set of commands that are only supported by fastethernet and not ethernet?

I just want to make sure that other than SPEED, everything else is the same. [/END NEWBIE WARNING]. Right off the top of my head the only thing I can think of is that you cannot trunk anything with a 10Mb connection (I guess IOS's after 12.2t support it though for built-in ports). You need at least 100Mb for that.

Also, if you are going to be using any routing protocols that calculate any part of their metric with bandwidth, you will see some variations in route choices (if you have a combination of 100 and 10 on your network). So just be prepared for that when you start labbing, and use the bandwidth command accordingly.

Right off the top of my head the only thing I can think of is that you cannot trunk anything with a 10Mb connection. You need at least 100Mb for that. Also, if you are going to be using any routing protocols that calculate any part of their metric with bandwidth, you will see some variations in route choices (if you have a combination of 100 and 10 on your network). So just be prepared for that when you start labbing, and use the bandwidth command accordingly.

Thanks, I was thinking about the trunking too.but that's ok I have other routers for that as well as some L3 switches. I forgot about the cost metric for routing protocols.

I think this would be a good thing though, it will allow me to see these protocols in action choosing a better path. Are you absolutely sure about not trunking with 10mb? I thought that it was ISL that couldn't trunk 10mb, but dot1q could? Right off the top of my head the only thing I can think of is that you cannot trunk anything with a 10Mb connection (I guess IOS's after 12.2t support it though). You need at least 100Mb for that. Also, if you are going to be using any routing protocols that calculate any part of their metric with bandwidth, you will see some variations in route choices (if you have a combination of 100 and 10 on your network). So just be prepared for that when you start labbing, and use the bandwidth command accordingly.According to at Cisco, that is what is (or was) in the CCNA material, however it not really the case.

And from what I see from a quick look around with Google, even an ancient Catalyst 1900 (which is a 10Mbps switch and only supports ISL) can trunk. @notgoing2fail, I'm going to lab this up right now on a couple different routers and see. According to at Cisco, that is what is (or was) in the CCNA material, however it not really the case. And from what I see from a quick look around with Google, even an ancient Catalyst 1900 (which is a 10Mbps switch and only supports ISL) can trunk. @notgoing2fail, I'm going to lab this up right now on a couple different routers and see. Thanks, on my older routers, I recalled I was able to do at least 802.1Q but I'm not positive.but let me know what you find out, I can lab this up as well if you don't have time. I think this is a good fundamental thing to know, if it's true, then the CCNA books should really change what they say as it makes no sense then.

NG2Fail, I think the ROAS (trunking) feature will not be available. If you're just trying to get an extra interface for a link to a switch, then you should be fine. I actually just ordered some ethernet cards (wic-1enet) for my 1760 routers. I just wanted another interface to add a DMZ to these routers. I hope this helps. I have not heard of ROAS? What is that?

But yeah, I basically just want a link to a switch and just wanted a quick general idea from you guys if there's any sense in paying more for fastethernet (not for the speed, but possible commands I may not be aware of currently). So it seems there's really not much difference so I should go ahead with the 10mb. I have not heard of ROAS? What is that?

But yeah, I basically just want a link to a switch and just wanted a quick general idea from you guys if there's any sense in paying more for fastethernet (not for the speed, but possible commands I may not be aware of currently). So it seems there's really not much difference so I should go ahead with the 10mb.Router on a stick.

Like I said above, if you are running 12.2(2)t or higher trunking will work on your routers running 10Mb ethernet on built-in ports, but not on modules. That link that Alan provided has a statement from cisco in it confirming this. So if your not worried about setting up trunks using the routers, you should have no real issues using 10Mb ports instead of FE. As a matter of fact i asked a similiar question to Mrock regarding his CCIE lab, and he put simple ethernet modules in his routers as well. Pro's outweighed the cons i guess. Have a good weekend man. Are you building your CCNP lab right now?

I don't really have a direction with my lab. I just purchased a 3620 along with a 4 port serial interface so I can use the router as a frame relay switch and practice general FR stuff.

I'm then looking to get a 2611XM along with a voice card so I can play with it for CCNA: Voice. I haven't checked what the requirement are for what is considered a CCNP lab. I'm hoping though that I have just enough equipment for any CCNP type of lab exercise. Just for kicks, here's what I have. (1) 1811W router (1) PIX515e (1) 3620 with 4 serial port NM. (1) 2511 with 8 port octal cable and w/transceiver for AUI (1) 2950 24 port switch (1) 2960G 24 port switch (2) 3550 PoE switches with EMI (2) 2900's series XL switches (1) 2501 router w/transceiver for AUI (1) 2507 router (1) 1720 router The older series routers are kinda useless because they don't have much flash/memory and the IOS's are old.

I'm a little switch heavy so I know I need to bulk up on obtaining more routers. But if you have any suggestions I'd really appreciate it. I'm just not sure what the CCNP lab requires. It won't matter much for what you're doing with it but the 3620 is an odd router which isn't particularly well supported by Cisco.

The available IOS versions for it is different than what is available for the 3640 and 3360 models. Whilst getting 'new' pieces of hardware is fun and exciting, you should take a step back from the purchasing. Do you really need all this hardware now? Unless its an amazing must buy it right now deal on something, you should wait until nearer the time when you need it. The 2500s are fine for things like injecting routes and you'll find them on the CCIE topology doing that.

You already know about the limitations for the 1720. You're covered for the CCNP regarding switches. Just get a few 2611XMs or something. Thanks, I'm pretty much done purchasing anything in the near future. Many of the stuff that I listed I've had from back in the days. The 2611XM is the only thing left that I'd really like to have. If you notice from my list, I don't have a single router other than the 1811 that I can do a VPN to.

The PIX515e is the only other choice but the commands are a little different and I didn't want to spend time fighting with it and learning a new set of commands for the PIX. I expect once I get my ethernet module for the 3620, I can do the VPN to it from the 1811 or even the 2611XM. I had no idea the 3620 was considered an odd router!!? I guess that's just my luck. My focus right now is the CCNA security so I can practice SDM stuff on the 1811.

Then after that either go CCNA Voice or CCNP. I had no idea the 3620 was considered an odd router!!? I guess that's just my luck.CCO lists 12.3.26 as the latest IOS you can get for a 3620. The largest feature set is IP FW/IDS/IPSEC plus or enterprise basic. A 3640/3660 however can run up to 12.4.15T13 advanced enterprise services like the 2600XMs as they had new software support discontinued at the same time.

I've no idea what would happen if you put a 12.4 image from a 3640 onto a 3620. The architecture looks similar but the 3620 has a slower CPU and less flash. The 2600XMs can only run up to 12.4.15T since Cisco discontinued support for them after that.

You still get rebuilds of 12.4.15T and it is up to T13 now. The CCIE topology is still using 12.4T last time I checked so you're okay with a 2600XM but it may possibly change to 15.0M or 15.1T in the future which the 2600XM don't support. A PIX doesn't give you quite the same CLI as IOS. CCO lists 12.3.26 as the latest IOS you can get for a 3620. The largest feature set is IP FW/IDS/IPSEC plus or enterprise basic.

A 3640/3660 however can run up to 12.4.15T13 advanced enterprise services like the 2600XMs as they had new software support discontinued at the same time. I've no idea what would happen if you put a 12.4 image from a 3640 onto a 3620.

The architecture looks similar but the 3620 has a slower CPU and less flash. Dude, are you a walking IOS knowledgebase? You know the IOS's so well!!! The 12.3(26) is what I just upgraded the 3620 with. I don't have an ethernet port for so what I did was use the serial ports that I have (NM-4T) and configured a point to point to another router with serial port that has E0. Connected my PC to that and did a TFTP transfer over simulated WAN.

LOL.pretty funny. I can always try the IOS for the other models and see what happens. I'll rather wait till I at least get my ethernet module though so if the image doesn't work, I can easily revert back the old image. I'm not sure I have enough flash though, my max is 32megs. 3620 is a brilliant and cheap frame-relay switch with the serial modules. As tiersten recommends above limited in IOS support though.

As a frame-relay switch you don't need the latest and greatest IOS. Its the only function it has in my Lab and is rock solid I bought the 3620 off eBay for $25! The NM-4T module was more expensive sadly! It was around $35 if I recall correctly.

I expect to use it only for FR and playing around with VPN connections once I get the ethernet module. My lab designs are a bit limited right now as I'm not astute enough right now to even comprehend any complex designs.

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