Re: Router on a Stick by ard

arifdatau · ‎04-04-2013

Here is my home lab topology that I'm having problem pinging between PC to Server and vice versa. Examine the topology below the PC that has an ip address 10.0.0.10 and to Server that has an IP address 30.0.0.10/24. What I did hard coded the mac-address on the Router Fas0/0. All trunk links are encapsulation dot1q and the router fas0/0 were splited into two sub-interfaces encap dot1q 2 for VLAN 2 and encap dot1q 3 for VLAN 3.

Kindly show me how do I fix my problem so that I can pinging the PC to Server and back. Thank so much.

mike-greene · ‎04-04-2013

Hi,

Can the PC and the server ping it's default gateway? Why did you hard code the routers MAC address on the router?

arifdatau · ‎04-04-2013

Good question Mike!..the reason is I just want to know provided if it work and all that, I know who is belong to..

Strange enough I could not pinging the default-gateway either so what is it the problem here? is it difference VLAN's or the trunking I did not config properly or what else it could be a problem? Thanks

mike-greene · ‎04-04-2013

Hi,

Lots of things to check..start at the PC and server and work your way to the router. Is the PC and server in the correct vlan and showing link? Are the IP addresses and subnet masks correct on the systems and router? Are the trunks up between the switches and passing the vlans? Is the switch interface that the router is connected to showing up and trunking with the correct vlans?

Lots of things to check.

arifdatau · ‎04-04-2013

Sorry that I have to paste my configuration because this forum does not provide file attachment only image and video. Now..please see my configuration, let me know if you may find anything peculiar or the error was? Thanks.

R5

interface FastEthernet0/0

description connect to SW1 Fas0/15

no ip address

duplex auto

speed auto

!

interface FastEthernet0/0.2

encapsulation dot1Q 2

ip address 10.0.0.2 255.255.255.0

!

interface FastEthernet0/0.3

encapsulation dot1Q 3

ip address 30.0.0.3 255.255.255.0

Sh ip int br

FastEthernet0/0 unassigned YES NVRAM up up

FastEthernet0/0.2 10.0.0.2 YES manual up up

FastEthernet0/0.3 30.0.0.3 YES manual up up

PC

interface FastEthernet0/0

ip address 10.0.0.10 255.255.255.0

!

ip default-gateway 10.0.0.2

Sh arp

Protocol Address Age (min) Hardware Addr Type Interface

Internet 10.0.0.10 - 0013.c45e.9cce ARPA FastEthernet0/0

Sh ip int br

FastEthernet0/0 10.0.0.10 YES manual up up

SW2

interface FastEthernet0/2

description connect to PC

switchport access vlan 2

switchport trunk encapsulation dot1q

switchport trunk native vlan 2

switchport mode access

!

interface FastEthernet0/11

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/12

switchport trunk encapsulation dot1q

switchport mode trunk

Sh vlan brief

VLAN Name Status Ports

---- -------------------------------- --------- -------------------------------

1 default active Fa0/1, Fa0/3, Fa0/4, Fa0/5

Fa0/6, Fa0/7, Fa0/8, Fa0/9

Fa0/10, Fa0/13, Fa0/14, Fa0/15

Fa0/16, Fa0/17, Fa0/18, Fa0/19

Fa0/20, Fa0/21, Fa0/22, Fa0/23

Fa0/24, Gi0/1, Gi0/2

2 VLAN0002 active Fa0/2

1002 fddi-default act/unsup

1003 token-ring-default act/unsup

1004 fddinet-default act/unsup

1005 trnet-default act/unsup

SW1

interface FastEthernet0/11

switchport access vlan 2

switchport trunk encapsulation dot1q

switchport mode trunk

shutdown

!

interface FastEthernet0/12

switchport access vlan 2

switchport trunk encapsulation dot1q

switchport mode trunk

shutdown

!

interface FastEthernet0/13

switchport access vlan 3

switchport trunk encapsulation dot1q

switchport mode trunk

shutdown

!

interface FastEthernet0/14

switchport access vlan 3

switchport trunk encapsulation dot1q

switchport mode trunk

shutdown

!

interface FastEthernet0/15

description connect to R5

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 2,3

switchport mode access

Sh vlan br

VLAN Name Status Ports

---- -------------------------------- --------- -------------------------------

1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4

Fa0/5, Fa0/6, Fa0/7, Fa0/8

Fa0/9, Fa0/10, Fa0/15, Fa0/16

Fa0/17, Fa0/18, Fa0/19, Fa0/20

Fa0/21, Fa0/22, Fa0/23, Fa0/24

Gi0/1, Gi0/2

2 VLAN0002 active Fa0/11, Fa0/12

3 VLAN0003 active Fa0/13, Fa0/14

1002 fddi-default act/unsup

1003 token-ring-default act/unsup

1004 fddinet-default act/unsup

1005 trnet-default act/unsup

SW3

interface FastEthernet0/3

switchport access vlan 3

switchport trunk encapsulation dot1q

switchport trunk native vlan 3

switchport mode access

!

interface FastEthernet0/13

switchport access vlan 3

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet0/14

switchport access vlan 3

switchport trunk encapsulation dot1q

switchport mode access

Sh vlan br

VLAN Name Status Ports

---- -------------------------------- --------- -------------------------------

1 default active Fa0/1, Fa0/2, Fa0/4, Fa0/5

Fa0/6, Fa0/7, Fa0/8, Fa0/9

Fa0/10, Fa0/11, Fa0/12, Fa0/15

Fa0/16, Fa0/17, Fa0/18, Fa0/19

Fa0/20, Fa0/21, Fa0/22, Fa0/23

Fa0/24, Gi0/1, Gi0/2

3 VLAN0003 active Fa0/3, Fa0/13, Fa0/14

1002 fddi-default act/unsup

1003 token-ring-default act/unsup

1004 fddinet-default act/unsup

1005 trnet-default act/unsup

Server

interface FastEthernet0/0

ip address 30.0.0.10 255.255.255.0

!

ip default-gateway 30.0.0.3

Sh arp

Protocol Address Age (min) Hardware Addr Type Interface

Internet 30.0.0.10 - 000d.2909.6840 ARPA FastEthernet0/0

sh ip int br

FastEthernet0/0 10.0.0.10 YES manual up up

NOTE:

I have shut all interface fa0/11 - 14 on SW1 because I have Native VLAN mismatch in all trunks.

*Apr 4 08:26:43.421: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on FastEthernet0/11 (1), with SW2 FastEthernet0/11 (2).

*Apr 4 08:26:43.421: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on FastEthernet0/12 (1), with SW2 FastEthernet0/12 (2).

*Apr 4 08:26:34.349: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on FastEthernet0/13 (1), with SW3 FastEthernet0/13 (3).

*Apr 4 08:26:34.389: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on FastEthernet0/14 (1), with SW3 FastEthernet0/14 (3).

cadet alain · ‎04-04-2013

Hi,

SW3:

interface FastEthernet0/3

switchport access vlan 3

no switchport trunk encapsulation dot1q

no switchport trunk native vlan 3

switchport mode access

!

interface FastEthernet0/13

no switchport access vlan 3

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/14

no switchport access vlan 3

switchport trunk encapsulation dot1q

switchport mode trunk

SW1:

interface FastEthernet0/11

no switchport access vlan 2

switchport trunk encapsulation dot1q

switchport mode trunk

no shutdown

!

interface FastEthernet0/12

no switchport access vlan 2

switchport trunk encapsulation dot1q

switchport mode trunk

no shutdown

!

interface FastEthernet0/13

no switchport access vlan 3

switchport trunk encapsulation dot1q

switchport mode trunk

no shutdown

!

interface FastEthernet0/14

no switchport access vlan 3

switchport trunk encapsulation dot1q

switchport mode trunk

no shutdown

!

interface FastEthernet0/15

description connect to R5

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 2,3

switchport mode trunk

SW2:

interface FastEthernet0/2

description connect to PC

switchport access vlan 2

no switchport trunk encapsulation dot1q

no switchport trunk native vlan 2

switchport mode access

clear arp on PC and Server and make sure ip routing is disabled with no ip routing command

Regards

Alain

Don't forget to rate helpful posts.

arifdatau · ‎04-05-2013

Hi Alain,

Thanks for the respond but between PC to Server to PC still isn't pinging, I also verified pinging to the router with no success as well. Would that be anything else we have missed here? Let me know what you think.

Regards,

Arif

cadet alain · ‎04-06-2013

Hi,

did you clear arp on all L3 devices? do this on the pc and router:

conf t

logging buffered debug

no service timestamp debug

do debug ip pack detail 100

access-list 100 permit icmp any any

do ping X.X.X.X rep 2 on the PC where X.X.X.X is the IP of the router in same subnet(f0/0.2)

do sh log

post the output here.

if it is ok then do the ping for the IP of f0/0.3 and if it is ok then do the ping for the server IP( do clear log between each ping).

Regards

Alain

Don't forget to rate helpful posts.

jawad-mukhtar · ‎04-07-2013

Hi,

Disable IP Routing on Switches

NO IP routing.

Post Sh ip int briief of Switche

Also

Give IP to L2 Switche to check Connectivity from near end.

*** Do Rate All Helpful Posts***

Jawad

arifdatau · ‎04-08-2013

Hi Alain,

First at all, it still doesn't work and I think I have tried every sources including you method and others too. It seems there still puzzle why this topology is not pinging. So I came up with similar topology but I used EIGRP to advertise both network and finally it work...:) Thanks for your help at least you try to help and others too.

Warm regards,

Arif