GNS3

Deception said:
Just a heads up as to why 192.168.4.x wouldnt work on R2 (when trying to ping hosts on R1). It was because R1 has the same network on its LAN and without NAT in place, it wouldn't of got through, as R1 would re-route it back to the 192.168.4.x on its LAN.
Click to expand...

Ah right OK. Makes sense.

Thanks for that Deception. Just going to add a few hosts on different VLANS from SW4 then either try putting some kind of DHCP server in or another router.
 
Deception said:
How you finding WANs
Click to expand...

Hi Mate.

Been working all weekend so haven't made any further progress with it as such.

I am looking to put a router or a 'server' with dhcp services on it and see how that goes. What you think? Also what about putting some authentication in place on the Routers so only authorised people can change the config?

Cheers
Tom.
 
Right I have a very basic DHCP Server running which I have got to work for One host.

The setup at the moment is; R2 goes to SW5 which goes to the 'DHCP Server'. From this I think I want a number of Users to be connected directly to this DHCP Server.

At the moment, I have one User connected from this Server via normal Ethernet and the DHCP allocation works correctly. Now when I add another User to a different interface of the Server, I have found out I have to do all the configurations again for each interface? Surely there is a way around this. For example, surely when I connect the host to the server, all's I should need to do is go into the config of that host and do 'ip address dhcp'? Also when I tried to allocate an IP address of 192.168.103.2 to Ethernet 1/1 it says there is an overlap from Ethernet 1/0.

Is there a more efficient way I could be doing this?

Config for the Server is:

Code: 
ip cef
no ip domain lookup
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.0.0 192.168.11.0
ip dhcp excluded-address 192.168.100.0 192.168.101.0
!
ip dhcp pool Users
   network 192.168.103.0 255.255.255.0
   default-router 192.168.103.1 
!
!
interface FastEthernet0/0
 ip address 192.168.102.2 255.255.255.0
 duplex auto
 speed auto
!
interface Ethernet1/0
 ip address 192.168.103.1 255.255.255.0
 half-duplex
!

Config for H1 is:

Code: 
!
interface Ethernet0/0
 ip address dhcp
 half-duplex
!
 
So try to run it through R2 yeah? Will I not have the same problem with interfaces though?

I.e. do you have to reconfigure it for every interface or can I configure it for the interface that goes to the Switch and the switch will sort it out from there?
 
If I was to create another Switch of R2 which was just going to be used to connect general users but they didn't belong to any VLAN, what would I put instead of switchport mode access vlan x ?

Could I just use trunk instead?
 
I think I have it working with Trunk. Does this matter?

Turns out you don't need anything. Trunk/Access is not needed at all. :)
 
Last edited:
Right so I have managed to put in a basic login system for when someone telnet's into R1.

If they give the correct Username/Password they will be logged in and will be prompted with a Menu which I have just set up. They are also logged in with privilege level 15. However, the user can only perform the commands I have gave them in the Menu. (Show IP Brief etc)

Should they not be able to start configuring the router if they logged in succesfully?

Ignore that ^^ I am going to set up an Admin account who should be able to login and start configuring the router remotely.
 
Last edited:
I've got this 'FileServer' here and I can't help but feel it is a bit useless ahha.

I know I coud set access controls so the server would only allow for ftp traffic but I'm struggling to see what the point in that would be if I can't perform tests to ensure this.

Any ideas?
 
Tonight I've managed to connect a Cloud (Internet) from R1 via a Loopback Adapter. Now R1 can ping/tracert IP addresses of actual websites.

However, it is only R1 who can do this and when I try for example to ping 4.2.2.2 from T1 it doesn't work. Furthermore it can't even ping the Loopback Adapter (192.168.137.1).

I'm pretty sure I have set up the routing protocols correctly so R1 can through packets to the Loopback Adapter however at the moment it is only R1 which is directly connected to the Cloud which can ping external IP addresses.

Is this something simple or am I looking at having to do NAT and then DNS?
 
I've got my Simulation to a good stage now I feel.

Now I am currently enduring the joys of writing a 15000 word report on what I've done.

It has been a good learning curve though and I may/may not come back to the simulation depending on time.

Cheers for the help, specifically Deception - you have been awesome.

Do you have a job in Networking if you don't mind me asking ahha?
 
I'm in my final year in Uni so I will most probably be looking for a role in IT in the very near future. Still deciding what I want to go into but probably looking at the Networking side of things.

Whilst I have been doing this I have been reading a CCENT/CCNA ICND 1 book which I've learnt a fair bit from as well as using GNS3 to perform the different things. I think I am going to do one of the certificates after I graduate. Would you recommend doing the CCNA and how hard is it?
 
Yeah that's true - have learnt a **** load in the space of a month or two haha. That's what it's all about though ain't it.

Isn't it, ICDN1 + ICND2 = CCNA?
 
Just a quick one - in my very first Simulation, I created a very basic topology of one Router, one Switch and two Terminals. T1 was set up to be on VLAN 10 and T2 was set up to be on VLAN 20. Now these terminals will not ping each other at all unless they are given a default gaateway.

Now the Simulation after that I created another two hosts and made one of them part of VLAN 10 and the other VLAN 20. So VLAN 10 would have (T1 and T3) and VLAN 20 would have (T2 and T4).

This simulation works perfectly without having to set up a default gateway, however I don't get why the first version wouldn't work if they have been set up completely the same? I'm currently evaluating the first version and haven't got a clue why they won't work unless they are given a default gateway?
 
Version 1.0

Code: 
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname SW1
!
boot-start-marker
boot-end-marker
!
no aaa new-model
memory-size iomem 5
!
ip cef
no ip domain lookup
!
interface FastEthernet0/0
 switchport mode trunk
!
interface FastEthernet0/1
 switchport access vlan 10
!
interface FastEthernet0/2
 switchport access vlan 20
!
interface FastEthernet1/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Vlan1
 no ip address
!
no ip http server
no ip http secure-server
!
control-plane
!
line con 0
 exec-timeout 0 0
 logging synchronous
line aux 0
line vty 0 4
 login
!
end

Version 1.1
Code: 
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname SW1
!
boot-start-marker
boot-end-marker
!
no aaa new-model
memory-size iomem 5
!
ip cef
no ip domain lookup
!
interface FastEthernet0/0
 switchport mode trunk
!
interface FastEthernet0/1
 switchport access vlan 10
!
interface FastEthernet0/2
 switchport access vlan 20
!
interface FastEthernet0/3
 switchport access vlan 10
!
interface FastEthernet0/4
 switchport access vlan 20
!
interface FastEthernet1/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Vlan1
 no ip address
!
no ip http server
no ip http secure-server
!
control-plane
!
line con 0
 exec-timeout 0 0
 logging synchronous
line aux 0
line vty 0 4
 login
!
end

Exactly the same from what I can see. Weird!!
 
You must log in or register to reply here.
Back
Top Bottom