Jump to content

iAdam's Hunt for Red Oct... er, IT Certification


ross549

Recommended Posts

Guest LilBambi

Yeah, but when you get to use it, it comes back faster than if you never learned it. Not quite as fast as riding a bike, but compared to how long it took to learn it all in the first time, it will feel like it. ;)

Link to comment
Share on other sites

Well, we just took the CCNA1 subnetting quiz (CIDR only) and I kicked the subnet questions all over the classroom. We have not hit VLSM yet, but I do have a bottle of Ibuprofen handy.

 

:P

 

Adam

  • Like 2
Link to comment
Share on other sites

They want to teach us the box method to VLSM. I will bring my colored pencils.

 

I now have a self-given assignment for routing. My instructor seems to think I could not ping a public IP address without a default route built and a static route to the IP in the box.

 

Off to deploy a Debian box. I think I will need to build an Ethernet cable. I think I am out. :P

 

Adam

Link to comment
Share on other sites

Pinging google.com......

 

adam@miner1:~$ ping 74.125.224.206
PING 74.125.224.206 (74.125.224.206) 56(84) bytes of data.
64 bytes from 74.125.224.206: icmp_req=1 ttl=55 time=22.9 ms
64 bytes from 74.125.224.206: icmp_req=2 ttl=55 time=21.2 ms
64 bytes from 74.125.224.206: icmp_req=3 ttl=55 time=22.4 ms
64 bytes from 74.125.224.206: icmp_req=4 ttl=55 time=23.4 ms
64 bytes from 74.125.224.206: icmp_req=5 ttl=55 time=23.5 ms
64 bytes from 74.125.224.206: icmp_req=6 ttl=55 time=22.7 ms
^C
--- 74.125.224.206 ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 5007ms
rtt min/avg/max/mdev = 21.285/22.723/23.503/0.745 ms

 

[size=4]adam@miner1:~$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
iface eth0 inet static
address 192.168.1.245
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 192.168.1.1
adam@miner1:~$ 

 

[size=4]root@miner1:/home/adam# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0

Link to comment
Share on other sites

Now with a broken default gateway:

 

[size=4]root@miner1:/home/adam# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.30 0.0.0.0 UG 0 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0

 

[size=4]root@miner1:/home/adam# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
iface eth0 inet static
address 192.168.1.245
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.30
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 192.168.1.1

 

[size=4]root@miner1:/home/adam# ping 74.125.224.206
PING 74.125.224.206 (74.125.224.206) 56(84) bytes of data.
From 192.168.1.245 icmp_seq=1 Destination Host Unreachable
From 192.168.1.245 icmp_seq=2 Destination Host Unreachable
From 192.168.1.245 icmp_seq=3 Destination Host Unreachable
From 192.168.1.245 icmp_seq=4 Destination Host Unreachable
From 192.168.1.245 icmp_seq=5 Destination Host Unreachable
^C
--- 74.125.224.206 ping statistics ---
8 packets transmitted, 0 received, +5 errors, 100% packet loss, time 7039ms

Link to comment
Share on other sites

Adding static route.....

 

root@miner1:/home/adam# ip route add 74.125.224.206 via 192.168.1.1 dev eth0

 

root@miner1:/home/adam# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.30 0.0.0.0 UG 0 0 0 eth0
74.125.224.206 192.168.1.1 255.255.255.255 UGH 0 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0

 

Boom. It works.

 

root@miner1:/home/adam# ping 74.125.224.206
PING 74.125.224.206 (74.125.224.206) 56(84) bytes of data.
64 bytes from 74.125.224.206: icmp_req=1 ttl=55 time=32.5 ms
64 bytes from 74.125.224.206: icmp_req=2 ttl=55 time=20.6 ms
64 bytes from 74.125.224.206: icmp_req=3 ttl=55 time=23.5 ms
64 bytes from 74.125.224.206: icmp_req=4 ttl=55 time=22.3 ms
64 bytes from 74.125.224.206: icmp_req=5 ttl=55 time=22.0 ms
^C
--- 74.125.224.206 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4006ms
rtt min/avg/max/mdev = 20.628/24.211/32.520/4.259 ms

Link to comment
Share on other sites

Guest LilBambi

As long as you are painting by numbers you should be be fine. ;)

 

It's when you need DNS for address translation that it gets tricky.

Link to comment
Share on other sites

So I showed the above to my instructor today, and he said he thought it would be easy enough to do in linux, but he did not think it would work in Windows. Huh?

 

This is a basic TCP/IP function! Why would Windows not have it?

 

*facepalm*

 

Adam

Link to comment
Share on other sites

Guest LilBambi

There are networking things that are SOP in UNIX/Linux and even Mac that are quite different in Windows sock.

 

Oh, and that will soon be true of Mac as well likely as it moves to support the Windows sock more and more sadly.

Link to comment
Share on other sites

It is another whole language. That language also does not correspond to anything I have used before.

 

The quiz for CCNA1 chapter 11 assumed I had memorized a number of those commands. Arg!

 

Adam

Link to comment
Share on other sites

V.T. Eric Layton

Yes, it's different. Not too bad, though. Learn it. Live it. Love it. You'll DIE without it when you go to take that exam. Trust me.

Link to comment
Share on other sites

V.T. Eric Layton

I'm not sure I understand your question?

 

I forget what they're calling it now... it was updated last October, but the tests used to be called ICND1 and ICND2 (ICND = Interconnecting Cisco Networking Devices). ICND1 and successfully passing (82.5%) examination will get you the CCENT certification. ICND2 and successfully passing the examination will get you the full CCNA cert. You can also opt for the combined test... a real nut cracker.

 

ICND1 is heavy on the mechanics of networking: subnetting, VLSM, router and switch setup, Cisco IOS, etc. ICND2 is heavy on routing protocols: EIRGP, RIP 1 & 2, OSPF, etc.

Link to comment
Share on other sites

V.T. Eric Layton

Adam, do they have you doing any lab work yet with sims or with actual Cisco equipment? You need your lab work. That's the only way you'll get comfortable with the Cisco command line and manipulating/troubleshooting the devices.

 

Open that file you downloaded from me the other night and install the Cisco Packet Tracer simulation app. It is a VERY, VERY good way to learn how to design, set-up, and manipulate cisco devices in real time.

 

Have fun! :)

Link to comment
Share on other sites

I was tinkering around with building router setups in Packet Tracer last night.

 

We are using version 4.0 of the Cisco Networking Academy. I guess there is CCNA 1-4. I am not sure how ours are related. From what I have been able to decipher, doing parts 1-4 would be needed for a full CCNA, but I am not sure.

 

But I think I am comfortable building a basic 2 subnet router + switch setup, which is what's needed for the practical test on Monday.

 

Adam

Link to comment
Share on other sites

Was being facetious. ;)

 

I'm not sure if I responded to temmu's post or not, but I assumed a broken gateway +static route would be doable in Windows.... did not know the syntax, nor did I take the time to look it up. Been sick + studying all week. :(

 

It does not help that my instructor has no previous experience with big time networking prior to teaching this course. He knows it fairly well, about 90% maybe, but I know I am frustrating him with my barrage of "why?" questions. ;)

 

Adam

Link to comment
Share on other sites

OK, So here is the document covering the course I am in at the moment.

 

https://www.netacad.com/documents/300010/10046467/CCNA+Routing+and+Switching+-+At+a+Glance/8738e31f-0cc1-4eb4-860e-aa59695dae53

 

I am doing Introduction to Networks now, and I'd be willing to bet we are starting Routing and Switching Essentials next week.

 

If I am reading the Cisco site correctly, I can take ICND1 and get CCENT certification. :)

 

Adam

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...