Router 888

[tafa]

Hello I have got this Cisco 888 router and I try to create my network. The problem is there are 4xL2 ports and I am not sure how to configure the VLANS. I recently started to learn networking and I am making a home lab now. So when I connect to the ISPs modem and set  a VLAN to take an IP via DHSP is ok, I can ping 8.8.8.8. But then I don't know how to make my network. So I need access to the internet in a 1st place.

[balaji.bandi · Accepted solution]

So from the router, you are able to ping 8.8.8.8 ok, but on the Lan side, you are not able to get internet ?

you need to post - show run  (here so we can suggest what changes required for the Lan to work)

here is basic guidelines : (you need ACL, NAT inside and outside for this work)

video : https://www.youtube.com/watch?v=FfPJ_dvM_is

https://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/260-cisco-router-nat-overload.html

[tafa]

Thanks but I still do a mistake.

Router#ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/14/16 ms
Router#show run
Building configuration...

Current configuration : 2037 bytes
!
! Last configuration change at 18:53:51 UTC Sun Sep 4 2022
!
version 15.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
!
!
!
!
!
!
!
!

!
ip dhcp excluded-address 192.168.1.1
ip dhcp excluded-address 192.168.2.1
!
ip dhcp pool Vlan 10
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 8.8.8.8
!
ip dhcp pool Vlan 20
network 192.168.2.0 255.255.255.0
default-router 192.168.2.1
dns-server 8.8.8.8
!
!
!
ip cef
no ipv6 cef
!
!
!
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
cts logging verbose
license udi pid C888-K9 sn FCZ222410TN
!
!
!
!
!
!
!
controller SHDSL 0
!
!
!
!
!
!
!
!
!
!
!
!
interface BRI0
no ip address
encapsulation hdlc
shutdown
isdn termination multidrop
!
interface FastEthernet0
switchport mode trunk
no ip address
!
interface FastEthernet1
switchport access vlan 10
no ip address
!
interface FastEthernet2
switchport access vlan 20
no ip address
!
interface FastEthernet3
no ip address
!
interface Vlan1
ip address dhcp
ip nat outside
ip virtual-reassembly in
!
interface Vlan10
ip address 192.168.1.1 255.255.255.0
ip nat inside
ip virtual-reassembly in
!
interface Vlan20
ip address 192.168.2.1 255.255.255.0
ip nat inside
ip virtual-reassembly in
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
ip nat inside source list 1 interface FastEthernet0 overload
!
!
access-list 1 permit 192.168.1.0 0.0.0.255
access-list 1 permit 192.168.2.0 0.0.0.255
!
control-plane
!
!
mgcp behavior rsip-range tgcp-only
mgcp behavior comedia-role none
mgcp behavior comedia-check-media-src disable
mgcp behavior comedia-sdp-force disable
!
mgcp profile default
!
!
!
!
!
!
!
line con 0
no modem enable
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
stopbits 1
line vty 0 4
login
transport input none
!
scheduler allocate 20000 1000
!
!
!
end

[balaji.bandi]

I have not looked the config, is this resolved or still issue, since i saw as marked as resolved so. please advise. before i will go through the config.

[Georg Pauwen · Accepted solution]

Hello,

here is a sample configuration for two Vlans:

ip dhcp excluded-address 192.168.1.1
ip dhcp excluded-address 192.168.2.1
!
ip dhcp pool VLAN1
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 8.8.8.8
!
ip dhcp pool VLAN2
network 192.168.2.0 255.255.255.0
default-router 192.168.2.1
dns-server 8.8.8.8
!
interface FastEthernet0
!
interface FastEthernet1
!
interface FastEthernet2
switchport access vlan 2
!
interface FastEthernet3
switchport access vlan 2
!
interface vlan 1
ip address 192.168.1.1 255.255.255.0
ip nat inside
!
interface vlan 2
ip address 192.168.1.1 255.255.255.0
ip nat inside
!
interface FastEthernet 4
ip address dhcp
ip nat outside
!
ip nat inside source list 1 interface Fastethernet4 overload
!
access-list 1 permit 192.168.1.0 0.0.0.255
access-list 1 permit 192.168.2.0 0.0.0.255
!
ip route 0.0.0.0 0.0.0.0 FastEthernet4 dhcp