12-19-2013 01:25 AM - edited 03-07-2019 05:09 PM
Hi Guys,
I am trying to configure my lab with Vlans and access to the internet VIA my Virgin Media router. I have had this working but while messing around i have broken it. Can anyone give me a hint as to how? Below is my router configuration. My laptop is connected to a switch and is pulling 192.168.10.1/24 via DHCP Thanks
Current configuration : 1681 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname CBTRouter
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$XtrM$gDxcY6FRQ3LQWGfY./E4K.
!
no aaa new-model
no network-clock-participate slot 1
no network-clock-participate wic 0
ip cef
!
!
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.0.50
ip dhcp excluded-address 192.168.10.50
!
ip dhcp pool dpool1
import all
network 192.168.10.0 255.255.255.0
default-router 192.168.10.50
!
!
no ip domain lookup
ip domain name CBTRouter.com
ip name-server 8.8.8.8
ip name-server 8.8.4.4
interface FastEthernet0/0
no ip address
ip virtual-reassembly
duplex auto
speed auto
!
interface FastEthernet0/0.10
description VLAN10 LEFT
encapsulation dot1Q 10
ip address 192.168.10.50 255.255.255.0
ip nat inside
ip virtual-reassembly
!
interface FastEthernet0/0.20
description VLAN21 RIGHT
encapsulation dot1Q 20
ip address 192.168.20.50 255.255.255.0
!
interface Serial0/0
no ip address
shutdown
!
interface FastEthernet0/1
ip address dhcp
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
!
ip route 192.168.10.0 255.255.255.0 FastEthernet0/1
!
!
no ip http server
no ip http secure-server
ip nat pool no-overload 192.168.0.100 192.168.0.150 prefix-length 24
ip nat inside source list 7 pool no-overload
!
access-list 7 permit 192.168.10.0 0.0.0.255
!
!
control-plane
!
!
banner motd ^CC
My router. Keep out.^C
!
line con 0
exec-timeout 0 0
password cisco
logging synchronous
login
line aux 0
line vty 0 4
password cisco
login
!
!
end
12-19-2013 02:45 AM
Why are you doing NAT on this device? Just to test?
Did your router receive an IP via DHCP and also a default route? Check that fa0/1 has an IP and that you have a default route with show ip route.
Daniel Dib
CCIE #37149
12-19-2013 04:40 AM
Yes i am just testing really.
FastEthernet0/1 192.168.0.7 YES DHCP up up
Gateway of last resort is 192.168.0.1 to network 0.0.0.0
C 192.168.10.0/24 is directly connected, FastEthernet0/0.10
C 192.168.20.0/24 is directly connected, FastEthernet0/0.20
C 192.168.0.0/24 is directly connected, FastEthernet0/1
S* 0.0.0.0/0 [254/0] via 192.168.0.1
I dont understand the static route in there. Where did that come from? The 192.168.0.1 is my virgin media router but the only config i entered is:
ip route 192.168.10.0 255.255.255.0 FastEthernet0/1
Thanks
Patrick
12-19-2013 05:52 AM
The "static" default route came from DHCP.
Is the Virgin router setup to do NAT for the 192.168.10.0/24 network? Does it have a route back for this network? What was the last change that you did?
Why did you put this route in:
ip route 192.168.10.0 255.255.255.0 FastEthernet0/1
That network is local to the router.
Daniel Dib
CCIE #37149
12-24-2013 04:53 AM
The last changes i made was creating the Vlans etc. From the router I can ping out to the internet and i can also ping in to my laptop.
The Virgin is just a standard VM superhub made by Netgear i think. I have made no changes to that at all.
ip route 192.168.10.0 255.255.255.0 FastEthernet0/1- I am confused with this. I though that this command should mean that anything from the .10 network should leave on F0/1. Should i remove this?
Thanks for your assistance.
Patrick
12-24-2013 09:24 AM
Hi,
ip route 192.168.10.0 255.255.255.0 FastEthernet0/1- I am confused with this. I though that this command should mean that anything from the .10 network should leave on F0/1. Should i remove this?
No, it means that anything destined for 192.168.10.0/24 is located out fa0/1.
It is not necessary because this 192.168.10.0/24 is already directly connected as an IP address in this network was configured on f0/0.10. As the AD of connected interface iz zero and AD of static route is 1, this static route will never be installed in the routing table.
Regards.
Alain
Don't forget to rate helpful posts.
12-22-2013 06:11 PM
I see there is a 1 problem with vlan 21 and encapsulation is dot1q 20. A little mistake.
Sent from Cisco Technical Support Android App
12-24-2013 04:54 AM
Well spotted. I have checked this over and it was just the description that was incorrect so i have changed that.
Thanks
Patrick
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