Solved: cable modem with router on a stick - Page 2

john smith · ‎02-05-2014

HI friends,

i have a setup for my small network like:

ADSL ---------- Router (2901) --------- catalyst Switch (2960) -------- LAN User (Data+VOIP+WLAN)

Router Config:

ip dhcp pool Data

network 172.16-.1.0 255.255.255.0

default-router 172.16.1.1

dns-server 192.168.1.1 4.2.2.2

ip dhcp pool Voice

network 172.16.2.0 255.255.255.0

default-router 172.16.2.1

dns-server 192.168.1.1 4.2.2.2

ip dhcp pool WLAN

network 172.16.3.0 255.255.255.0

default-router 172.16.3.1

dns-server 192.168.1.1 4.2.2.2

interface gigEthernet0/1

description Facing the ISP (the ADSL Modem)

ip address dhcp

ip nat outside

i did (show dhcp server) and got an ip address from the ADSL modem for this port ------192.168.1.2

!

interface gigEthernet0/0

description ****Facing LAN*****

no ip address

ip nat inside

interface gigEthernet0/0.1

description ****Facing LAN-Data*****

ip address 172.16.1.1 255.255.255.0

encapsulation dot1q 1 native

interface gigEthernet0/0.2

description ****Facing LAN-Voice*****

ip address 172.16.2.1 255.255.255.0

encapsulation dot1q 2

interface gigEthernet0/0.3

description ****Facing LAN-WLAN*****

ip address 172.16.3.1 255.255.255.0

encapsulation dot1q 3

access-list 1 permit 172.16.0.0 0.0.0.255

ip nat inside source list 1 interface gigethernet0/1 overload

ip router 0.0.0.0 0.0.0.0.0 gigethernet 0/1

Switch Config:

int vlan 1

Description***Data**

ip address 172.16.1.2 255.255.255.0

!

int vlan 2

Description***Voice**

ip address 172.16.2.2 255.255.255.0

!

int vlan 3

Description***WLAN**

ip address 172.16.3.2 255.255.255.0

ip default-gateway 172.16.1.1

int gig 1/0

description *****Connected to Router*****

switchport mode trunk

int fa 1/0

switchport mode access

switchport access vlan1

switchport voice vlan 2

Above is the config that i configure on router and switch but unfortunatelt internet does not work from any pc connected to the switch

i checked from router (sh ip nat translation) but output showing nothing.

same router is being used as CME also ang having the voice over ip configuration on it.... is that is the problem ?

atteched file is show version of the router if needed to check plzi am getting ip address on pc but not able to browse.

while i can browse when connect to the modem direct with cable to my pc

any suggestion and idea will be very appreciated! and i need urgent help plz

thanks

Jon Marshall · ‎02-06-2014

Can you ping the cable modem ?

Is the gi0/1 interface up/up

when you connect the PC directly to the cable modem what IP does your PC get ?

Jon

john smith · ‎02-06-2014

HI,

this is config now

Router:

interface GigabitEthernet0/0

description *****Connected to LAN***

no ip address

duplex auto

speed auto

end

interface GigabitEthernet0/0.1

description ***Subinterface for DATA Vlan***

encapsulation dot1Q 1 native

ip address 172.16.1.1 255.255.255.0

ip nat inside

ip virtual-reassembly in

end

!

interface GigabitEthernet0/0.2

description ***Subinterface for VOICE Vlan***

encapsulation dot1Q 2

ip address 172.16.2.1 255.255.255.0

ip nat inside

ip virtual-reassembly in

end

interface GigabitEthernet0/0.3

description ****Subinterface for WLAN****

encapsulation dot1Q 3

ip address 172.16.3.1 255.255.255.0

ip nat inside

ip virtual-reassembly in

end

!

interface GigabitEthernet0/1

description ****Connected to ADSL Modem****

ip address 192.168.1.2 255.255.255.0

ip nat outside

ip virtual-reassembly in

duplex auto

speed auto

access-list 1 permit 172.16.0.0 0.0.255.255

ip nat inside source list 1 interface GigabitEthernet0/1 overload

ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/1

any idea please?

Thanks

Jan Rolny · ‎02-06-2014

Hi,

could you please paste results sh ip inter brief from 2901 and switch. Next sh vlan from switch.

Please confirm that ADSL modem is allright and has access to the internet(ISP).

Please confirm that your ADSL modem has inside adress 192.168.1.1 255.255.255.0 and you can ping this address from 2901 router.

Thanks,

Jan

john smith · ‎02-06-2014

HI,

Router:

Router#sh ip int b

Interface IP-Address OK? Method Status Protocol

Embedded-Service-Engine0/0 unassigned YES NVRAM administratively down down

GigabitEthernet0/0 unassigned YES NVRAM up up

GigabitEthernet0/0.1 10.1.1.1 YES NVRAM up up

GigabitEthernet0/0.2 10.1.2.1 YES NVRAM up up

GigabitEthernet0/0.3 10.1.3.1 YES NVRAM up up

GigabitEthernet0/1 192.168.1.2 YES NVRAM up up

NVI0 unassigned YES unset administratively down down

Switch

SWITCH#sh ip int b

Interface IP-Address OK? Method Status Protocol

Vlan1 10.1.1.2 YES NVRAM up up

Vlan2 10.1.2.2 YES NVRAM up up

Vlan3 10.1.3.2 YES NVRAM up up

FastEthernet0/1 unassigned YES unset down down

FastEthernet0/2 unassigned YES unset down down

FastEthernet0/3 unassigned YES unset down down

FastEthernet0/4 unassigned YES unset down down

FastEthernet0/5 unassigned YES unset down down

FastEthernet0/6 unassigned YES unset down down

FastEthernet0/7 unassigned YES unset down down

FastEthernet0/8 unassigned YES unset down down

FastEthernet0/9 unassigned YES unset down down

FastEthernet0/10 unassigned YES unset down down

FastEthernet0/11 unassigned YES unset down down

FastEthernet0/12 unassigned YES unset down down

FastEthernet0/13 unassigned YES unset down down

FastEthernet0/14 unassigned YES unset down down

FastEthernet0/15 unassigned YES unset down down

FastEthernet0/16 unassigned YES unset down down

FastEthernet0/17 unassigned YES unset down down

FastEthernet0/18 unassigned YES unset down down

FastEthernet0/19 unassigned YES unset down down

FastEthernet0/20 unassigned YES unset down down

FastEthernet0/21 unassigned YES unset down down

FastEthernet0/22 unassigned YES unset down down

FastEthernet0/23 unassigned YES unset down down

FastEthernet0/24 unassigned YES unset down down

GigabitEthernet0/1 unassigned YES unset up up

GigabitEthernet0/2 unassigned YES unset down down

Yes, ADSL have the internet access to the ISP (i use that to connect with internet now and msging you)

yes, adsl's ip is 192.168.1.1/24 and i can ping that from router and switch

SWITCH#ping 192.168.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/4/9 ms

Router#ping 192.168.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

Jon Marshall · ‎02-06-2014

Can you post the actual config you have on your router ?

Can you change your default route to -

ip route 0.0.0.0 0.0.0.0 192.168.1.1

Jon

john smith · ‎02-06-2014

Hi,

after changing ip route to 0.0.0.0 0.0.0.0 192.168.1.1

ITS'S WORKIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIiiiiNG

Thank you so much marshall

its really very appreciated!!

Jan Rolny · ‎02-06-2014

Hi,

thanks for output provided. Now it does not make sense. Because in output we can see addresses like 10.1.1.1, 10.1.2.1 and 10.1.3.1 but your last config has different network range(172.16.x.x) so I just wonder if it is typo or different configuration.

Thanks,

Jan

Istvan kelemen · ‎02-06-2014

Hello,

Could you please rate my answer above?

Br,

István

john smith · ‎02-06-2014

Yes, Sure and thank you sooo much everyone of you

God bless you all!