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New Member

help on network setup plz

PROBLEM:

I have a switch and router hooked up via ethernet and would like to create 4 vlans that go to different ip addresses.  Ports 1-8 of the switch are trunk ports.  I have configured the router and switch but cannot to get any of them to ping.  The dsl modem has 4 ports and ethernet will be connected to the port 1 of the modem to access the internet.  Can u please tell me what I'm doing wrong??

hostname lab

!

no logging console


!

ip subnet-zero

no ip domain-lookup

!

interface FastEthernet0/1

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/2

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/3

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/4

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/5

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/6

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/7

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/8

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/9

switchport access vlan 100

!

interface FastEthernet0/10

switchport access vlan 100

!

interface FastEthernet0/11

switchport access vlan 100

!

interface FastEthernet0/12

switchport access vlan 100

!

interface FastEthernet0/13

switchport access vlan 100

!

interface FastEthernet0/14

switchport access vlan 100

!

interface FastEthernet0/15

switchport access vlan 100

!

interface FastEthernet0/16

switchport access vlan 100

!

interface FastEthernet0/17

switchport access vlan 101

!

interface FastEthernet0/18

switchport access vlan 101

!

interface FastEthernet0/19

switchport access vlan 101

!

interface FastEthernet0/20

switchport access vlan 101

!

interface FastEthernet0/21

switchport access vlan 101

!

interface FastEthernet0/22

switchport access vlan 101

!

interface FastEthernet0/23

switchport access vlan 101

!

interface FastEthernet0/24

switchport access vlan 101

!

interface FastEthernet0/25

switchport access vlan 102

!

interface FastEthernet0/26

switchport access vlan 102

!

interface FastEthernet0/27

switchport access vlan 102

!

interface FastEthernet0/28

switchport access vlan 102

!

interface FastEthernet0/29

switchport access vlan 102

!

interface FastEthernet0/30

switchport access vlan 102

!

interface FastEthernet0/31

switchport access vlan 102

!

interface FastEthernet0/32

switchport access vlan 102

!

interface FastEthernet0/33

switchport access vlan 102

!

interface FastEthernet0/34

switchport access vlan 102

!

interface FastEthernet0/35

switchport access vlan 102

!

interface FastEthernet0/36

switchport access vlan 102

!

interface FastEthernet0/37

switchport access vlan 103

!

interface FastEthernet0/38

switchport access vlan 103

!

interface FastEthernet0/39

switchport access vlan 103

!

interface FastEthernet0/40

switchport access vlan 103

!

interface FastEthernet0/41

switchport access vlan 103

!

interface FastEthernet0/42

switchport access vlan 103

!

interface FastEthernet0/43

switchport access vlan 103

!

interface FastEthernet0/44

switchport access vlan 103

!

interface FastEthernet0/45

!

interface FastEthernet0/46

!

interface FastEthernet0/47

!

interface FastEthernet0/48

!

interface GigabitEthernet0/1

!

interface GigabitEthernet0/2

!

interface VLAN1

no ip directed-broadcast

no ip route-cache

!

interface VLAN10

no ip directed-broadcast

no ip route-cache

shutdown

!

interface VLAN100

ip address 10.100.0.50 255.255.0.0

no ip directed-broadcast

no ip route-cache

shutdown

!

interface VLAN101

ip address 10.101.0.50 255.255.0.0

no ip directed-broadcast

no ip route-cache

shutdown

!

interface VLAN102

ip address 172.100.0.50 255.255.0.0

no ip directed-broadcast

no ip route-cache

shutdown

!

interface VLAN103

ip address 172.101.0.50 255.255.0.0

no ip directed-broadcast

no ip route-cache

shutdown

!

!

line con 0

transport input none

stopbits 1

line vty 0 4

login

line vty 5 15

login

!

End

hostname HQLAB_R1

!

boot-start-marker

boot-end-marker

!

no logging console

!

no aaa new-model

ip cef

!

!

no ip dhcp use vrf connected

ip dhcp excluded-address 10.100.0.1 10.100.0.10

ip dhcp excluded-address 10.101.0.1 10.101.0.10

ip dhcp excluded-address 172.101.0.1 172.101.0.10

ip dhcp excluded-address 172.100.0.1 172.100.0.10

!

ip dhcp pool 10.100.0.1

   network 10.100.0.0 255.255.0.0

   default-router 10.100.0.1

   dns-server 10.100.0.1

!

ip dhcp pool 10.101.0.0

   network 10.101.0.0 255.255.0.0

   default-router 10.101.0.1

   dns-server 10.101.0.1

!

ip dhcp pool 172.101.0.0

   network 172.101.0.0 255.255.0.0

   default-router 172.101.0.1

   dns-server 172.101.0.1

!

ip dhcp pool 172.100.0.0

   network 172.100.0.0 255.255.0.0

   default-router 172.100.0.1

   dns-server 172.100.0.1

!

!

no ip domain lookup

ip multicast-routing

!

interface Ethernet0/0

ip address 192.168.15.100 255.255.255.0

ip nat outside

half-duplex

!

interface FastEthernet0/0

no ip address

shutdown

speed auto

!

interface FastEthernet0/0.100

encapsulation dot1Q 100

ip address 10.100.0.1 255.255.0.0

ip nat inside

!

interface FastEthernet0/0.101

encapsulation dot1Q 101

ip address 10.101.0.1 255.255.0.0

ip nat inside

!

interface FastEthernet0/0.102

encapsulation dot1Q 102

ip address 172.100.0.1 255.255.0.0

ip nat inside

!

interface FastEthernet0/0.103

encapsulation dot1Q 103

ip address 172.101.0.1 255.255.0.0

ip nat inside

!

ip forward-protocol nd

ip route 0.0.0.0 0.0.0.0 192.168.15.1

!

no ip http server

no ip http secure-server

ip nat inside source list NAT interface Ethernet0/0 overload

!

ip access-list extended NAT

permit ip 10.100.0.0 0.0.255.255 any

permit ip 10.101.0.0 0.0.255.255 any

permit ip 172.101.0.0 0.0.255.255 any

permit ip 172.100.0.0 0.0.255.255 any

!

!

control-plane

!

line con 0

stopbits 1

line aux 0

line vty 0 4

login

line vty 5 15

login

!

end

13 REPLIES
Silver

Re: help on network setup plz

Have you configured the vlans in the vlan database on the switch?  For example in global config mode:


vlan 100

vlan 101

vlan 102

vlan 103


If you execute a 'show vlan' are these vlans in the output?



Chris

New Member

Re: help on network setup plz

I did a show vlan and got

what i configured on the switch:

Port 1-8: For Trunking

Port 9-16: For VLAN 100

Port 17-24: For VLAN 101

Port 25-36: For VLAN 102

Port 37-44: For VLAN 103

status is active, also when I no shutdown on the vlan interfaces it won't work, it keeps going back to shutdown (??)

Re: help on network setup plz

What kind of switch? It sounds like a L2.

HTH, John *** Please rate all useful posts ***
New Member

Re: help on network setup plz

its a catalyst 3500 xl, the router is a 1700

gerry

Re: help on network setup plz

That's a L2 switch. The only thing you can do is create your L2 vlans and

trunk the port that you want to connect your router to. The L2 will only

have one active vlan for management. You'll use your router to route

between vlans. You'll need to create your vlans on the router to, but it

depends on what router you have as to how many vlans you can create. Do a

sh vlan-switch on your router to see what vlans it has.

John

HTH, John *** Please rate all useful posts ***
New Member

Re: help on network setup plz

I did a show vlan-switch on the router but none of the vlans I configured are showing up

(100,101,102,103).  its showing vlan 1, 1002,1003,etc. ???


gerry

Re: help on network setup plz

You'll need to create your vlans. From the router# prompt, type "vlan database" and hit enter. Then create your vlans by doing vlan 100 , vlan 101 , etc. Note that you'll only be able to create a certain amount depending on your router model. You may not be able to have more than 2.

HTH,

John

HTH, John *** Please rate all useful posts ***

Re: help on network setup plz

Oh, I misread your last post. You have a 1700.

I noticed that your FA0/0 is shut. You'll need to unshut that to enable your other subinterfaces to come up, but you don't have to create vlans on that router...in fact, you can't.

John

HTH, John *** Please rate all useful posts ***
New Member

Re: help on network setup plz

what I meant was I created subinterfaces that will link to vlans on the switch.

However, I still cannot get a connection.  I suppose I need to configure a default gateway on the switch to route but the ip addressing is what I am not sure of.

Re: help on network setup plz

Gerry,

Did you unshut your interface on your router?

int fa0/0

no shut

HTH, John *** Please rate all useful posts ***

Re: help on network setup plz

In addition to what Christopher asked, your vlan interfaces are shut  on the switch. You'll need to open those before anything will pass. You also need to enable ip routing by using the "ip routing" command.

HTH,

John

HTH, John *** Please rate all useful posts ***
New Member

Re: help on network setup plz

ok I shut down vlan1 since only one vlan can be active at a time.  Then did a no shutdown on vlan100 to bring the status up.  Tried pinging the gateway but no luck.    Any ideas would be greatly appreciated!!

New Member

Re: help on network setup plz

Hi Gerry,

As John mentioned you would want the router to route between vlans since you have a layer 2 switch.

You can follow this example for router on a stick configuration.

http://www.ciscosystems.com/en/US/tech/tk389/tk815/technologies_configuration_example09186a00800949fd.shtml


Tim

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