Help with my VLAN setup

WasteTimeChangingCars

WasteTimeChangingCars

WasteTimeChangingCars

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Joined
2 Mar 2009
Posts
228
Location
republic of Agdgdgwngo
I bought a cisco 1841 router so that I could segment my home network into 2 VLANs and each with access to the internet that was the plan. The cisco router was meant to go through the broadband router which is a Billion BiPAC 7402X. However PCs in the VLANs have no access to the internet I think I’ve made a mistake with NAT I’m not really sure, also ping's seem to fail when i try to ping PCs . If someone could tell me where I’ve gone wrong that would be great.

Edit: i should say that the Billion router already has DNS and NAT running

Configs below

Billion BiPAC 7402X
Code: 
Billion Router
Management address – 192.168.2.1
DNS – 8.8.8.8 – 212.69.36.3

Cisco 1841
Code: 
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname LAB
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
dot11 syslog
ip cef
!
!
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.10.1
ip dhcp excluded-address 192.168.20.1
!
ip dhcp pool VLAN-10-Desktops
   network 192.168.10.0 255.255.255.0
   default-router 192.168.10.1 
   dns-server 192.168.2.1 
!
ip dhcp pool VLAN-20-WiFi
   network 192.168.20.0 255.255.255.0
   default-router 192.168.20.1 
   dns-server 192.168.2.1 
!
!
ip name-server 192.168.2.1
ip name-server 8.8.8.8
ip name-server 212.69.36.3
!
multilink bundle-name authenticated
!
!
!
!
archive
 log config
  hidekeys
! 
!
!
!
!
!
!
interface FastEthernet0/0
 no ip address
 ip nat outside
 ip virtual-reassembly
 speed 100
 half-duplex
!
interface FastEthernet0/0.1
 description Native VLAN 1
 encapsulation dot1Q 1 native
 ip address 192.168.2.2 255.255.255.0
 ip nat inside
 ip virtual-reassembly
!
interface FastEthernet0/0.10
 description VLAN 10 Desktops
 encapsulation dot1Q 10
 ip address 192.168.10.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly
!
interface FastEthernet0/0.20
 description VLAN 20 Wi-Fi
 encapsulation dot1Q 20
 ip address 192.168.20.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0
!
!
ip http server
no ip http secure-server
ip nat inside source list 1 interface FastEthernet0/0 overload
!
access-list 1 permit 192.168.0.0 0.0.0.255
!
!
!
!
control-plane
!
!
line con 0
 exec-timeout 0 0
 logging synchronous
line aux 0
line vty 0 4
 login
!
scheduler allocate 20000 1000
end
 
Last edited:
ots3go said:
Quick query, but are you devices receiving the IP address of the router interface? As they're not excluded from the DHCP range?

Can't really look in detail unfortunately... might have been drinking.

NAT also won't be doing anything as the access list isn't called on any interface.

Can the interface be declared as outside whilst is sub-interfaces are inside?
Click to expand...

yes, devices are receiving ip addresses

Thanks for your suggestions I'll go and implement them and see if it works, once again thanks
 
I’ve changed the interfaces round and all PCs can ping each other when I enabled RIP1 on both Cisco and Billion routers. However no access to the internet for PCs in VLANs 10 & 20, I am very confused as to why this is the case. I’m unsure if I need NAT running on the Cisco router I’m pretty sure I don’t when NAT is already running fine on the Billion router which is connected to the internet. My public IP address is 212.69.47.163

A ruff diagram of the network
Capture-1.jpg


New Cisco config
Code: 
LAB#sh running
Building configuration...

Current configuration : 1695 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname LAB
!
boot-start-marker
boot-end-marker
!
enable password cisco
!
no aaa new-model
dot11 syslog
ip cef
!
!
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.10.1
ip dhcp excluded-address 192.168.20.1
!
ip dhcp pool vlan-10
   network 192.168.10.0 255.255.255.0
   default-router 192.168.10.1
   dns-server 192.168.2.1
!
ip dhcp pool vlan-20
   network 192.168.20.0 255.255.255.0
   default-router 192.168.20.1
   dns-server 192.168.2.1
!
!
ip name-server 192.168.2.1
ip name-server 8.8.8.8
ip name-server 212.69.36.3
!
multilink bundle-name authenticated
!
!
!
!
archive
 log config
  hidekeys
!
!
!
!
!
!
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 speed 100
 full-duplex
!
interface FastEthernet0/1.1
 description vlan 1
 encapsulation dot1Q 1 native
 ip address 192.168.2.2 255.255.255.0
!
interface FastEthernet0/1.10
 description vlan 10
 encapsulation dot1Q 10
 ip address 192.168.10.1 255.255.255.0
!
interface FastEthernet0/1.20
 description vlan 20
 encapsulation dot1Q 20
 ip address 192.168.20.1 255.255.255.0
!
router rip
 network 192.168.2.0
 network 192.168.10.0
 network 192.168.20.0
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 FastEthernet0/1.1
!
!
ip http server
no ip http secure-server
!
!
!
!
!
control-plane
!
!
line con 0
 logging synchronous
line aux 0
line vty 0
 password cisco
 login
line vty 1 4
 login
line vty 5 9
 login
!
scheduler allocate 20000 1000
end

sh ip route
Code: 
Gateway of last resort is 0.0.0.0 to network 0.0.0.0

R    212.69.47.0/24 [120/1] via 192.168.2.1, 00:00:09, FastEthernet0/1.1
C    192.168.10.0/24 is directly connected, FastEthernet0/1.10
C    192.168.20.0/24 is directly connected, FastEthernet0/1.20
C    192.168.2.0/24 is directly connected, FastEthernet0/1.1
S*   0.0.0.0/0 is directly connected, FastEthernet0/1.1
 
Last edited:
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