GNS3

Hey.

Well I am completely new to the software and I am using it as part of my final year project in university.

Now I am kinda stuck on where to start with it all and what I want to create at the end of it.

Any ideas?
 
With regards to the IOS's I have grasped that and I know I will require an IOS - just which IOS I will need is something I will have to decide.

The program initially looks complicated however I guess the more practice the easier it will become.

With regards to what I want to achieve - I have basically been asked to have a look at it and create some kind of network simulation using it. I know that I may be able to use WireShark as part of this?

The thing that I implement isn't the only thing I am going to be creating but it is the thing that I am going to be using to get my practical marks (i.e build, test, draw conclusions). Therefore I don't think it is going to be too over complicated just something good that I can demonstrate I guess.

I am also going to be doing some research on various things so the actual thing I am going to simulate doesn't have to be the be all end all kind of thing.
 
I don't think Packet Tracer is Open Source is it?

It's important that I use a piece of Open Source software as I am doing some research into Open Source as well.

Cheers.
 
Hi Lads.

Well basically I have done most of the very basic tutorials but I'm still stuck on what I can do now I know a bit more about it.

Are there any good tutorials you can point me towards so I can further my understanding?

Cheers.

Also: I have two CCNA books here - CCNA Official Exam Certification Library Third Edition. Will it be off any use to read through these?

Time isn't on my side you see and I need to be able to put something together that is semi-complicated and something that I can test.
 
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Think they will be useful?

With the software can you perform tests for reliability, performance etc?
 
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I'm giving this CCNA book a read to maybe try and get used to some of the commands I could use to configure the routers.

Can you point me in the right direction to any good tutorial sites or do you think the stuff on YouTube would be sufficient?

Shame their isn't any books on GNS3 that I could use.

Cheers
Tom.
 
Do any of you know the best way to represent an end-user?

I.E. If I wanted to connect a number of terminals/end-users to the network?
 
Cheers - have been using VM's or routers acting as hosts. Both do pretty much the same job when configured correctly.

One thing I am slightly worried about is the lack of results that GNS3 output's. As mentioned previously in this thread, my Final report includes a heavily weighted section on Technical Content, i.e. graphs displaying results what I can talk about. Now I know other network simulation programs like OPNET include a wealth of graph plotting material however GNS3 seems to lack this completely.

Does anyone know any way in which I can produce output that I can discuss within my report?

Regards
Tom.
 
Could you please give me some more information on this as I am not familiar with the term SNMP.

Is it an application that I can use to obtain graphs based on my GNS3 simulation?
 
Yeah me too but hey gotta start somewere!

Will have a look at them links cheers - just that i need something to analysis/discuss and without any graphs that is going to be difficult.
 
Hi again.

So I've created a basic VLAN with One router, One Switch, and Two VLAN's (VLAN 10 & VLAN 20) both of which are connected to the Switch which is then connected to the router. Each VLAN has 4 hosts and each host can communicate with each other - so Host A (VLAN 10) can communicate with Host D who is on VLAN 20.

Now I am trying to add another Switch which is connected to the first Switch so I can set up VLAN's 30 and 40 from this Switch and each host should be able to communicate with one another.

Now I've set up the second switch and tried to create VLAN 30 with just the one host for now, however I can't for the life of me get the host to be able to communicate with VLAN's 10/20 and vice versa.

Any ideas where I am going wrong here?
 
I think I have done.


interface FastEthernet0/0
no ip address
duplex auto
speed auto
!
interface FastEthernet0/0.10
encapsulation dot1Q 10
ip address 192.168.1.1 255.255.255.0
!
interface FastEthernet0/0.20
encapsulation dot1Q 20
ip address 192.168.2.1 255.255.255.0
!
interface FastEthernet0/0.30
encapsulation dot1Q 30
ip address 192.168.3.1 255.255.255.0
 
I think I am a bit stuck on how to set SW2 (Switch 2) up correctly. Am I to give it an IP address 192.168.3.2 and an IP route of 192.168.3.1?

I think I have something working. Switch 1 is set up so it reads 'switchport access vlan 30 on the interface it uses to connect to SW2. SW2 is set up with IP address of 192.168.3.2 with IP route of 192.168.3.1. Can now ping all of the hosts so am I right in thinking that if I connect some hosts now to SW2 and configure them with IP address 192.168.3.x and IP route 192.168.3.1 they should all communicate?
 
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Cheers for the help. Right I've changed the interface from SW1 to SW2 from mode access to trunk however now I can't ping anything. Furthermore, the Host that is connected to SW2 can also not do anything. Should I be assigning the switch any ip address/default route?

At the moment the port from SW2 to SW1 has an IP address of 192.168.3.2 and an IP route of 192.168.3.1. The port from SW2 to the host is set up as switchport access vlan 30. I think these should work however I am probably missing something obvious.

Cheer for this deception :)
 
YESS!! Finally done it. Cheers for the help deception. Was setting it up wrong. Set SW1 port out to SW2 as trunk and vice versa. Connected Host to SW2 with IP address 192.168.3.2 with IP route 192.168.3.1 and it works. Can't believe I've just wasted like 3 hours of my life trying to do that when it was so simple!

Got any ideas of how I can make the network a bit more advanced after I've set up VLAN's 30 and 40? Maybe add another switch and make some more VLAN's but that may be a bit repetitive?
 
Deception said:
Can also get to grips with ACL (Access Control Lists). Create a host/server (depending if you want to use Packet Tracer or GNS3) in a VLAN and then block a set of hosts from connecting to it, but allow the same hosts to be able to access everything else.
Click to expand...

That is really strange as that is exactly what I was going to start looking at next haha.

Can I create a router but use it as a server? Also, how easy is it to carry a VLAN over a WAN link?

Oh yeah, and I am going to change it so that instead of having VLAN's 30 & 40 off SW2 they are VLAN's 10 & 20 instead (more realistic).
 
Haha touché! Right OK that is something that I can be getting on with today.

How do you mean a switch that has all VLAN's on it? Does't SW1 and SW2 have all VLAN's on it anyway?
 
Right cheers for that.

I am going to keep VLANS 30 & 40 off from SW2. Create another switch SW3 and have VLAN's 10 & 20 off SW3 as well as SW1.

Do you think I should try and create a Server and do access control from that or do access control from VLAN to VLAN? I.e. hosts on VLAN 10 can communicate with hosts on VLAN 30, however hosts from VLAN 30 can't communicate with hosts on VLAN 10?

Thanks again for this Deception.
 
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