CCNA Study Group

AB.Calculus

I hope I didn't bring down the momentum, by my last post.

Anyhow, I've done some reading from Network Warrior by Gary A. Donahue since I was bored and will possibly start reviewing for the ICND1 exam.

shyguyIT

Good luck AB.Calculus ... I have ICND2 booked for April 19th as well.

xnx

I find windows server administration boring too, but it's just one of those those things you have to do to get an entry level IT / networking position.

I got an interview in Manchester for a 'IT assistant' but it sounded very support based and required a minimum of 80 tickets a month being closed. So yeah I declined that and i'm waiting for something better for when I get out of university.

Magic Johnson

Got the job! Woohoo! Nice little pay rise and a free car too.

So I think my title is: VoIP/Data networks installation and support field engineer. That'll be confirmed in a letter today. Swizzle!

Staunchy

Magic Johnson wrote: »

Got the job! Woohoo! Nice little pay rise and a free car too.

So I think my title is: VoIP/Data networks installation and support field engineer. That'll be confirmed in a letter today. Swizzle!

Well done congrats Magic!!!

You still haven't mentioned when you going for ICND2

Magic Johnson

Staunchy wrote: »

Well done congrats Magic!!!

You still haven't mentioned when you going for ICND2

I have totally bombed mate, my studying has been non-existent with moving home and work has been a nightmare. This role requires CCNA and nearly all my colleagues at the new firm have this as a minimum so hopefully that will motivate me!

However I am on EIGRP at the mo, which I reckon is around half way through, I am for the end of May. Fingers crossed!

ednard

xnx wrote: »

I find windows server administration boring too, but it's just one of those those things you have to do to get an entry level IT / networking position.

I got an interview in Manchester for a 'IT assistant' but it sounded very support based and required a minimum of 80 tickets a month being closed. So yeah I declined that and i'm waiting for something better for when I get out of university.

Same. I'm in a support capacity right now as I work through second year, but that's only to get a years experience on my CV; I have absolutely no plan to accept any assistance/support based capacity when I finished (unless I bomb my final year ofc ).

Magic Johnson wrote: »

Got the job! Woohoo! Nice little pay rise and a free car too.

So I think my title is: VoIP/Data networks installation and support field engineer. That'll be confirmed in a letter today. Swizzle!

Well done! Sounds excellent!

Magic Johnson

To be fair guys, this 4.5 years in desktop/server support gives you a solid, solid foundation for troubleshooting and basic understanding of a lot, A LOT, of things. I'd say it's crucial. Not just the tech but working with people dependent on it for working/making money. It's a great bedrock layer but limited I feel, I didn't really want to go down sysadmin or MS route.

wgroom

Congratulations Magic, well done. And you are very true, the majority of the time someone will not step into the role they want with little or no experience. They have to "make their bones" so to speak, learning from the ground up. I feel it makes us better engineers.

--chris--

I had my first all-nighter session with GNS3 1.0 this past Friday. I feel a bit like Neo after they plug him in for the first time lol. I know kung-fu....

I know people say you don't need to really use GNS3 or lab for the CCENT, but working on the CLI has really hammered home when/where you use certain things and how to move around between the different modes. I also set up my first virtual network successfully, even if they were static routes!

I logged into Steam for the first time in a year and seen I had 896 hours into Team Fortress 2. Jesus, 896 hours! I wish I would have spent half that time on the CCENT.

santaowns

Going to be jumping on this track again myself. Been actually configuring production devices for last month so I figured I better be sure I knew what I was changing. Halfway through Chris Bryant videos. In the mean time been getting other vendors entry level certs. Like ZyTEL zcnp switch, adtran technical associates and brocade. Not as popular but still knocks home the fact that I know networking regardless of brand. Btw those tests are all free. I plan on doing my ccna then jncia from juniper next. Just wanted to update,

Cerebro

My plan of action so far:

-Watched all of Bryant's videos...watching them again on fast forward.
-Reading relevant topics in Odoms ICND2 book
-Packet tracer labs, and following along with Dans courses.

I feel I could take the exam tomorrow and scrape a pass. But I am fuzzy on a few topics and will schedule it for the end of May.

--chris--

santaowns wrote: »

Going to be jumping on this track again myself. Been actually configuring production devices for last month so I figured I better be sure I knew what I was changing. Halfway through Chris Bryant videos. In the mean time been getting other vendors entry level certs. Like ZyTEL zcnp switch, adtrat technical associates and brocade. Not as popular but still knocks home the fact that I know networking regardless of brand. Btw those tests are all free. I plan on doing my ccna then jncia from juniper next. Just wanted to update,

Have you added the info for the free stuff to this thread?

http://www.techexams.net/forums/general-certification/99703-free-reduced-certifications-free-reduced-training-2014-edition.html

If not, please do I would like to look at them!

--chris--

Cerebro wrote: »

My plan of action so far:

-Watched all of Bryant's videos...watching them again on fast forward.
-Reading relevant topics in Odoms ICND2 book
-Packet tracer labs, and following along with Dans courses.

I feel I could take the exam tomorrow and scrape a pass. But I am fuzzy on a few topics and will schedule it for the end of May.

Chris's videos have been great for wrapping my head around new topics as well as demonstrating how/why they are used. 100% would recommend his series on Udemy to anyone studying this.

santaowns

Chris, I just added the ADTRAN ones and the ZyTEL one and brocade ones are already there.

Magic Johnson

Odom says the K values are outwith the scope of the book, is that right? 'for the purposes of discussion'. Are there any CCNA questions about the other K values other than bandwidth/delay?

Agent47

Hi Everyone,

Glad to come back and see that many of you are keeping up and sharing your progress. I hope things are going well for you both professionally and personally. So I have a question. Right now, I am really trying to wrap my head around route summarization. I found this link but I am still a bit confused as to how this process works. I've also watched a few youtube vids but feel like they lack something. I dunno. Now, I do get the initial part of writing the IP's in binary (which I really dont want to do) comparing each from left to right and determining which bits match to get the mask but after looking at some questions I still feel like im in the dark. It's one of those things where I sort of get it but not really. I'd like to know the quickest way to do this without writing binary. Anyway enough of my rambling, take for example:

Summarize 172.148.0.0 /13 - 172.156.0.0/13

The answer is 172.144.0.0/16

Could someone give an in depth step by step from their perspective of how the 144 came about? (I understand subnetting concepts. Probably the highlight of my studies Thanks!

Jon_Cisco

Agent47 wrote: »

Anyway enough of my rambling, take for example:

Summarize 172.148.0.0 /13 - 172.156.0.0/13

The answer is 172.144.0.0/16

Could someone give an in depth step by step from their perspective of how the 144 came about? (I understand subnetting concepts. Probably the highlight of my studies Thanks!

I would have picked 172.144.0.0/12

172.1001 0000.0.0
172.1001 1100.0.0

first 12 digits are common. I'm not great with this either so I'm not sure if I'm right.

Cerebro

172.1001 0100.0.0 = 148
172.1001 1100.0.0 = 156


First 16 bits are common.


Wouldn't it be 172.148.0.0/16?

Magic Johnson

Jon_Cisco wrote: »

I would have picked 172.144.0.0/12

172.1001 0000.0.0
172.1001 1100.0.0

first 12 digits are common. I'm not great with this either so I'm not sure if I'm right.

My first thoughts. How can you summarise a collection of IPs with a higher mask?

Jon_Cisco

I mixed up the numbers in my example. 148 and 156 were the original question.
I think for route summarization you are trying to create a single address range that will include both address. (or a long list of addresses)

172.144.0.0/16 allows only the 172.144.0.0 class B address. It's not actually subnetted.
16 Network bits 172.144.x.x
16 Host Bits 172.144.0.0 - 172.144.255.255

This does not account for the larger address range required to include 172.148.x.x and 172.156.x.x
So I understand sumarization to be asking for an address range that will hold:
172.148.0.0 - 172.155.255.255
&
172.156.0.0 - 172.163.255.255
So we are looking for an address that will hold 172.148.0.0 - 172.163.255.255

Anyone know if I'm on the right track?

Magic Johnson

Jon_Cisco wrote: »

I mixed up the numbers in my example. 148 and 156 were the original question.
I think for route summarization you are trying to create a single address range that will include both address. (or a long list of addresses)

172.144.0.0/16 allows only the 172.144.0.0 class B address. It's not actually subnetted.
16 Network bits 172.144.x.x
16 Host Bits 172.144.0.0 - 172.144.255.255

This does not account for the larger address range required to include 172.148.x.x and 172.156.x.x
So I understand sumarization to be asking for an address range that will hold:
172.148.0.0 - 172.155.255.255
&
172.156.0.0 - 172.163.255.255
So we are looking for an address that will hold 172.148.0.0 - 172.163.255.255

Anyone know if I'm on the right track?

Yes. So how on earth can 172.144.0.0/16 be the right answer?

xnx

Made a mistake, I apologise

Jon_Cisco

xnx wrote: »

It is as it's the most specific route in this case and the binary values for the first 16 bits are common to each other.

Could you explain the logic in detail so we can all understand this better? I'm definitely not seeing 16 common bits.

anywho

I only see 12 as well.

Magic Johnson

xnx wrote: »

It is as it's the most specific route in this case and the binary values for the first 16 bits are common to each other.

172.148.0.0/13 = 172.144.0.0 - 172.151.255.255

172.144.0.0/16 = 172.144.0.0 -172.144.255.255

No?

xnx

I made a mistake by assuming some advice above, I'll work this out on paper and then update this post.


Update:
I get 172.148.0.0/12 as the first 12 bits match and there's nothing more specific than that

That mask will make the increment go up in 16's on the 2nd octet, so this summary will cover 172.148.0.0 to 172.164.0.0 which includes the 172.156.0.0 address that we require.

Sorry if I've confused anyone earlier, I do apologise.

xnx

Accidental double post

xnx

Magic Johnson wrote: »

172.148.0.0/13 = 172.144.0.0 - 172.151.255.255

172.144.0.0/16 = 172.144.0.0 -172.144.255.255

No?

Just trying to use a subnet calculator on my phone for first time and it's going horribly wrong lol

What a mess I've made on this thread... this is what happens when you're revising for Computer Science and trying to do Route summarisation as well -_-

cpartin

Answer is 172.144.0.0/12.

The /16 is a typo. Think about it this way, you can't summarize 2 large subnets with a smaller one so that answer fails a quick sanity check. Question is a bit tricky since the IP addresses given are in the middle of the subnet.

172.148.0.0/13 = 172.144.0.0 - 172.151.255.255
172.156.0.0/13 = 172.152.0.0 - 172.159.255.255

Range to summarize is therefore 172.144.0.0 - 172.159.255.255.

Edit: Original logic didn't work for all cases.