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ross549

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

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LilBambi
:hysterical:

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ross549

Well, it is a curious thing until you break it down into binary. It makes no sense within the base-10 octets.

 

I am one of those learners that until I know every part of something, I may as well not know ANY part of it.

 

Adam

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V.T. Eric Layton

This stuff is like a language. If you don't use it, you lose it. :(

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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. ;)

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V.T. Eric Layton

Umm... I'll stick to bike riding. ;)

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LilBambi

Heard that! :yes:

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ross549

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

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ebrke

Congrats! (at least I think/hope so--kicked all over the classroom seems to imply victory)

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V.T. Eric Layton

VLSM is not difficult at all. Learning sub-netting itself was more difficult by far.

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LilBambi

Congrats Adam! :thumbup:

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ross549

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

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ross549

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

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ross549

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

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ross549

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

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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.

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ross549

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

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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.

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LilBambi

Don't forget SAMBA had to be created to deal with just some of those anomalies.

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Temmu

the route command in windows

open a command prompt as admin -

typing route by itself will give you a list of options

 

example of adding a route off your current network

route add -p 172.30.0.0 mask 255.255.0.0 10.10.10.55 metric 1

 

add - i want to add a new route off of my network

-p - i want this to be permanent in my routing table

172.30.0.0 is the destination network

mask 255.255.0.0 is the subnet mask for the destination network

10.10.10.55 is the ip address of the gateway you want to use to get to the destination network

metric 1 is how senior is this entry, lower numbers first

 

to display your pc or server's routing table

route print

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LilBambi

Ah come on Temmu! You take all the fun out... ;)

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ross549
:D

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ross549

Cisco IOS..... *facepalm*

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Temmu

@lilbambi - adam had made a statement about windows capabilities, i simply posted a response.

 

ps

i know windows is crippled compared to linux, for example, windows can by default only have 10 ping threads running at a time.

pps

and starting with xp, ms has improved its tcp/ip stack.

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V.T. Eric Layton

What about Cisoc IOS, Adam?

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ross549

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

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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.

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ross549

I know.

 

A question... we are doing CCNA 1 and 2. How far will that get me?

 

Adam

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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.

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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! :)

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LilBambi

@lilbambi - adam had made a statement about windows capabilities, i simply posted a response.

 

Was being facetious. ;)

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