Any Cisco experts? Little help please

Hey Mate,

I'm not sure what I've done to it, but communication from Vlan A to say Vlan G will now route across the backbone network! Not every device works yet but presumably I've screwed something up somewhere :)
 
Hey Mate,

It was until I added all that .99 stuff - so I've probably messed it up so it works now! Not really too sure. Shame I can't save this in an older format you'd be able to see what I've done easily then!
 
Hey Mate,

Not quite, but its getting there. I need to seriously look at the addressing as the devices or certain devices at least must have internet addresses not private network addresses! You have mail!
 
Hey mate,

One final question of help if I may?

I need to make my switches remotely administerable (sp?) from each pc on the network. The routers should be the same but until now I've been using an interface address to get into them.

I created a vlan ip on one of the switches to test but cannot get it to connect remotely or ping still :(

Any suggestions?

Thanks
 
Just think of the switches as hosts - when accessing them they aren't much different. You need to give them an IP address on an interface (in this case int vlan99 I think you used) and a default gateway. Once that is done you need to make sure that VLAN can traverse the links, so in trunk mode this should be done by default.

The next stage is to make sure the routers interface that is attached to them also has an interface in that vlan. Looking at your diagram you could do this --> select the interface that connects to the switch and remove any curent ip addressing from it. Create a subinteface in the vlan 99 (int fa 0/0.99 as an example) which means it can communicate with a trunk port on the switch. Next give it an IP address that is on the same range as the switch (sio if the switch is interface vlan99 ip address 10.1.1.1/24 then you could make the router 10.1.1.254. This is the IP address you want to use for switches default gateway.

Example Router:

Code: 
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 no ip address
 duplex auto
 speed auto
!
interface FastEthernet0/0.10
 encapsulation dot1Q 10
 ip address 192.168.10.254 255.255.255.0
!
interface FastEthernet0/0.99
 encapsulation dot1Q 99 native
 ip address 10.1.1.254 255.255.255.0
!
interface FastEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
!
!
!
!
!
!
!
!
line con 0
line vty 0 4
 login
!
!
!
end

Example switch:

Code: 
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/1
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/2
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan99
 ip address 10.1.1.1 255.255.255.0
!
ip classless
ip route 10.0.0.0 255.0.0.0 10.1.1.254 
!
!
!
!
!
!
!
!
!
line con 0
line vty 0 4
 login
!
!
!
end

Fa 0/0 on the router connected to fa 0/1 on the switch. The switch also has 2 VLANs created - 10 and 99 (10 for data 99 for management)

Any better?

Edit: If you need to get them from anywhere then you "should" be fine already as your terminals are in efect connecting directly to the router via the switch, so the network you use will be in the routing table, however if it was me i'd be using OSPF or whatever IGP you're using and advertise the network normally, otherwise youll have problems if the connection from the router to that switch goes down as it wont know where to send the traffic

- Pea0n
 
Last edited:
Hey Mate,

Thanks for the help, I think I'm going to delete all of it and start again as quite frankly its a complete mess and just doesn't seem to work. I can ping from the router to the switch with how its set now, but the pc's attached to that switch can't ping it. In simulation mode the packet buggers off out of the router onto the network.
 
Hey,

Look forward to a thread of - Nothing works, took long enough just to get the start of it going! In my head I can't fathom or picture the router to switch link and how its affected or even if it needs its own link from the router to enable it to be administrated from another terminal. If I could get my head around that perhaps I'd understand! :)
 
Well don't jump in at the deep end if you know something you don't get. Connect a router to the switch and try and just get a ping working between them. Then add a PC to another interface on the router and get a ping working between the PC and switch. Once you get that working add another router and then another switch :)

- Pea0n
 
Suggest OP learns Routing first principles first, then takes Pea0ns advice above. Build your topology from the inside outwards, one at a time and verify everything before moving onto the next devic.
 
Hey,

I've done that stuff, sadly its gone with the wind and I can't remember most of it for the life of me! Getting the network to work wasn't so bad. Getting the switches addressed and working is proving impossible. I've spent around thirty hours on this now and I have just about had enough!
 
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