topic Inter vlan routing problem in Routing and SD-WAN

Inter vlan routing problem

junaid haroon — Tue, 05 Mar 2019 05:11:15 GMT

Hi,

i tried to archive the inter valn rotuing using layer 3 switch.i can ping every PC between different vlans.But i cannot ping router interface.Netwrok diagram is attached for your reference.

Here is configuration

Layer-3 switch

Building configuration...

Current configuration : 1439 bytes

version 12.2

no service password-encryption

hostname Switch

ip routing

ip ssh version 1

port-channel load-balance src-mac

interface FastEthernet0/1

switchport mode trunk

interface FastEthernet0/2

switchport mode trunk

interface FastEthernet0/3

switchport access vlan 10

interface FastEthernet0/4

switchport access vlan 20

interface FastEthernet0/5

switchport access vlan 20

interface FastEthernet0/6

no switchport

ip address 192.168.40.253 255.255.255.0

duplex auto

speed auto

interface FastEthernet0/7

interface FastEthernet0/8

interface FastEthernet0/9

interface FastEthernet0/10

interface FastEthernet0/11

interface FastEthernet0/12

interface FastEthernet0/13

interface FastEthernet0/14

interface FastEthernet0/15

interface FastEthernet0/16

interface FastEthernet0/17

interface FastEthernet0/18

interface FastEthernet0/19

interface FastEthernet0/20

interface FastEthernet0/21

interface FastEthernet0/22

interface FastEthernet0/23

interface FastEthernet0/24

interface GigabitEthernet0/1

interface GigabitEthernet0/2

interface Vlan1

no ip address

shutdown

interface Vlan10

ip address 192.168.10.254 255.255.255.0

interface Vlan20

ip address 192.168.20.254 255.255.255.0

interface Vlan30

ip address 192.168.30.254 255.255.255.0

router rip

ip classless

ip route 0.0.0.0 0.0.0.0 192.168.40.254

line con 0

line vty 0 4

end

*****************************************************************************************************************

My layer 2 Switch configuration

Current configuration : 967 bytes

version 12.1

no service password-encryption

hostname Switch

interface FastEthernet0/1

switchport mode trunk

interface FastEthernet0/2

switchport access vlan 10

interface FastEthernet0/3

switchport access vlan 20

interface FastEthernet0/4

switchport access vlan 30

interface FastEthernet0/5

interface FastEthernet0/6

interface FastEthernet0/7

interface FastEthernet0/8

interface FastEthernet0/9

interface FastEthernet0/10

interface FastEthernet0/11

interface FastEthernet0/12

interface FastEthernet0/13

interface FastEthernet0/14

interface FastEthernet0/15

interface FastEthernet0/16

interface FastEthernet0/17

interface FastEthernet0/18

interface FastEthernet0/19

interface FastEthernet0/20

interface FastEthernet0/21

interface FastEthernet0/22

interface FastEthernet0/23

interface FastEthernet0/24

interface Vlan1

no ip address

shutdown

line con 0

line vty 0 4

line vty 5 15

end

*****************************************************************************************

please help me out

Inter vlan routing problem

kcnajaf — Mon, 30 Sep 2013 14:19:21 GMT

HI Junaid,

Not sure if i got your problem right?

You have mentioned that "I can ping every PC between different vlans" that mean your able to ping from on pc to other pc on different vlans? If that is the case then inter-vlan routing is working right?

You have trouble in pinging only the router interface from the PC? Is that right? If so can you please tel from which PC your trying to ping which ip address on the multi-layer switch?

Also have you enabled routing gloabally with command "ip routing" ?

Regards

Najaf

Inter vlan routing problem

Paul M1 — Mon, 30 Sep 2013 14:52:54 GMT

Display SH IP ROUTE on the L3 switch?

Re: Inter vlan routing problem

Jan Hrnko — Mon, 30 Sep 2013 15:57:40 GMT

Hi Junaid,

The problem is most probably at the Router0. Does it have ip route back to these VLANs? Or does it at least have default route configured, pointing at the Switch0?

Try to do traceroute from PC, see if you get any reply from Router0. Check Router0's routing table, if it has records for addresses from which you are pinging:

Router0#show ip route [IP_ADDRESS_OF_THE_COMPUTER_FROM_WHICH_YOU_ARE_PINGING]

If you get output like this: % Network not in table add appropriate routes (configure static or dynamic routing).

I wouldn't worry about ip routing command though, the running-config you have provided clearly states that it is enabled.

Best regards,

Jan

Inter vlan routing problem

junaid haroon — Tue, 01 Oct 2013 04:06:50 GMT

Hi Jan,

Here the output of Router0#show ip route command on router0

Router#sh ip route 192.168.30.2

% Network not in table

Router#

Jan can you please guide me how i define a route on router.And the default on layer 3 switch is already added.

ip route 0.0.0.0 0.0.0.0 192.168.40.254

looking forward for your reply

Inter vlan routing problem

cadet alain — Tue, 01 Oct 2013 06:23:37 GMT

Hi,

ip route 192.168.30.0 255.255.255.0 192.168.40.253

Regards

Alain

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Inter vlan routing problem

junaid haroon — Tue, 01 Oct 2013 06:51:11 GMT

Hi cadet,

Do you saw my diagram after adding this route my traffic come back to lan.I want to out my traffic from router.and make a things that users can also ping router

Inter vlan routing problem

cadet alain — Tue, 01 Oct 2013 07:19:27 GMT

Hi,

if you want to ping the router interface 192.168.40.254 from the PCs then you must give a route for each vlan subnet on the router,each pointing towards the L3 routeds port of the L3 switch doing the interVlan routing.

What I gave you is one of these static routes.

Regards

Alain

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Inter vlan routing problem

junaid haroon — Tue, 01 Oct 2013 07:33:05 GMT

Hi cadet,

Got it and Thanks.I have one more issue on layer 2 switch i caan't ping any vlan interface??

Inter vlan routing problem

Jan Hrnko — Tue, 01 Oct 2013 07:49:30 GMT

Hi,

Jan can you please guide me how i define a route on router.And the default on layer 3 switch is already added.

as Alain said, you must configure static routes for every vlan, or you can define default route (which will forward any packet to the swtich, for which the router doesn't have a better route). You have that already on your switch but lacking on router. Default route will take care of everything in your case. I think that you can configure it this way in packet tracer:

Router0(config)#ip route 0.0.0.0 0.0.0.0 192.168.40.253

I have one more issue on layer 2 switch i caan't ping any vlan interface??

From which host/switch/router, with what source IP address are you pinging which vlan interface? Please, post also configs of these devices or upload your pkt file, so we can help you out.

Best regards,

Jan

Inter vlan routing problem

cadet alain — Tue, 01 Oct 2013 08:08:47 GMT

Hi,

You must have a management interface Vlan with an ip address and ip default-gateway x.x.x.x where x.x.x is the vlan interface in this management vlan on the layer 3 switch.

Regards

Alain

Don't forget to rate helpful posts.

Re: Inter vlan routing problem

junaid haroon — Tue, 01 Oct 2013 08:34:39 GMT

Hi jan,

I did't little amendent its starts pinging.

Now I want 1 managment vlan from which i telnet every switch how i do this???

Here is layer 2 switch configuration

Switch#sh run

Building configuration...

urrent configuration : 1147 bytes

version 12.1

no service password-encryption

hostname Switch

interface FastEthernet0/1

switchport mode trunk

interface FastEthernet0/2

switchport access vlan 10

interface FastEthernet0/3

switchport access vlan 20

interface FastEthernet0/4

switchport access vlan 30

interface FastEthernet0/5

interface FastEthernet0/6

interface FastEthernet0/7

interface FastEthernet0/8

interface FastEthernet0/9

interface FastEthernet0/10

interface FastEthernet0/11

interface FastEthernet0/12

interface FastEthernet0/13

interface FastEthernet0/14

interface FastEthernet0/15

interface FastEthernet0/16

interface FastEthernet0/17

interface FastEthernet0/18

interface FastEthernet0/19

interface FastEthernet0/20

interface FastEthernet0/21

interface FastEthernet0/22

interface FastEthernet0/23

interface FastEthernet0/24

interface Vlan1

no ip address

shutdown

interface Vlan10

ip address 192.168.10.254 255.255.255.0

interface Vlan20

ip address 192.168.20.254 255.255.255.0

interface Vlan30

ip address 192.168.30.254 255.255.255.0

line con 0

line vty 0 4

line vty 5 15

end

Inter vlan routing problem

cadet alain — Tue, 01 Oct 2013 08:56:03 GMT

Hi,

just create one VLAN on all switches ,for example vlan 99 and configure a SVI(vlan interface) with an ip address for this vlan on all switches then on the l2 switches configure ip default-gateway x.x.x.x where x.x.x.x is the vlan interface for management IP.On your router if you didn't configure a default route pointing towards the l3 switch then create a static route for this Vlan subnet.

Regards

Alain

Don't forget to rate helpful posts.

Inter vlan routing problem

junaid haroon — Tue, 01 Oct 2013 11:54:45 GMT

Hi cadet alain

What should be the default gateway for management vlan??

Inter vlan routing problem

cadet alain — Tue, 01 Oct 2013 12:47:57 GMT

Hi,

the ip address of the management vlan interface on the core switch.

Regards

Alain

Don't forget to rate helpful posts.

Inter vlan routing problem

junaid haroon — Wed, 02 Oct 2013 05:23:08 GMT

Hi cadet

I define the managment vlan on core switch and layer 2 switch.But its not working

managment vlan Ip on layer 3 switch 192.168.50.253

management vlan on layer 2 switch 192.168.50.254 ip-default gateway 192.168.50.253

Here is layer 3 switch.

Current configuration : 1541 bytes

version 12.2

no service password-encryption

hostname Switch

ip routing

ip ssh version 1

port-channel load-balance src-mac

interface FastEthernet0/1

switchport mode trunk

interface FastEthernet0/2

switchport mode trunk

interface FastEthernet0/3

switchport access vlan 10

interface FastEthernet0/4

switchport access vlan 20

interface FastEthernet0/5

switchport access vlan 20

interface FastEthernet0/6

no switchport

ip address 192.168.40.253 255.255.255.0

duplex auto

speed auto

interface FastEthernet0/7

interface FastEthernet0/8

interface FastEthernet0/9

interface FastEthernet0/10

switchport access vlan 50

interface FastEthernet0/11

interface FastEthernet0/12

interface FastEthernet0/13

interface FastEthernet0/14

interface FastEthernet0/15

interface FastEthernet0/16

interface FastEthernet0/17

interface FastEthernet0/18

interface FastEthernet0/19

interface FastEthernet0/20

interface FastEthernet0/21

interface FastEthernet0/22

interface FastEthernet0/23

interface FastEthernet0/24

interface GigabitEthernet0/1

interface GigabitEthernet0/2

interface Vlan1

no ip address

shutdown

interface Vlan10

ip address 192.168.10.254 255.255.255.0

interface Vlan20

ip address 192.168.20.254 255.255.255.0

interface Vlan30

ip address 192.168.30.254 255.255.255.0

interface Vlan50

ip address 192.168.50.253 255.255.255.0

router rip

ip classless

ip route 0.0.0.0 0.0.0.0 192.168.40.254

line con 0

line vty 0 4

password test

end

Layer 2 switch conf

Current configuration : 1258 bytes

version 12.1

no service password-encryption

hostname Switch

interface FastEthernet0/1

switchport mode trunk

interface FastEthernet0/2

switchport access vlan 10

interface FastEthernet0/3

switchport access vlan 20

interface FastEthernet0/4

switchport access vlan 30

interface FastEthernet0/5

interface FastEthernet0/6

interface FastEthernet0/7

interface FastEthernet0/8

interface FastEthernet0/9

interface FastEthernet0/10

interface FastEthernet0/11

interface FastEthernet0/12

interface FastEthernet0/13

interface FastEthernet0/14

interface FastEthernet0/15

interface FastEthernet0/16

interface FastEthernet0/17

interface FastEthernet0/18

interface FastEthernet0/19

interface FastEthernet0/20

interface FastEthernet0/21

interface FastEthernet0/22

interface FastEthernet0/23

interface FastEthernet0/24

interface Vlan1

no ip address

shutdown

interface Vlan10

ip address 192.168.10.254 255.255.255.0

interface Vlan20

ip address 192.168.20.254 255.255.255.0

interface Vlan30

ip address 192.168.30.254 255.255.255.0

interface Vlan50

ip address 192.168.50.254 255.255.255.0

ip default-gateway 192.168.50.253

line con 0

line vty 0 4

password test

line vty 5 15

end

Switch#

Inter vlan routing problem

kcnajaf — Wed, 02 Oct 2013 07:02:53 GMT

Hi Junaid,

What model of L2 switch you are having? You have created multiple SVI interface on this switch hence i hope it would be able to do routing as well.On the switch you are calling as "Layer 2 switch" add below line and see if that helps

ip route 0.0.0.0 0.0.0.0 192.168.50.253

If this is not working then please share below output from the L2 switch.

show ip int brief

show ip route

Hope that helps

Regrads

Najaf

Re: Inter vlan routing problem

junaid haroon — Wed, 02 Oct 2013 07:07:05 GMT

Hi,

I am using 2950 as layer 2 switch.Above command is not working in layer2 switch.below is output.Interface vlan 50showing me down hoever i issue no shut down command still down

Enter configuration commands, one per line. End with CNTL/Z.

Switch(config)#ip route 0.0.0.0 0.0.0.0 192.168.50.253

% Invalid input detected at '^' marker.

Switch#sh ip interface brief

Interface IP-Address OK? Method Status Protocol

FastEthernet0/1 unassigned YES manual up up

FastEthernet0/2 unassigned YES manual up up

FastEthernet0/3 unassigned YES manual up up

FastEthernet0/4 unassigned YES manual up up

FastEthernet0/5 unassigned YES manual down down

FastEthernet0/6 unassigned YES manual down down

FastEthernet0/7 unassigned YES manual down down

FastEthernet0/8 unassigned YES manual down down

FastEthernet0/9 unassigned YES manual down down

FastEthernet0/10 unassigned YES manual down down

FastEthernet0/11 unassigned YES manual down down

FastEthernet0/12 unassigned YES manual down down

FastEthernet0/13 unassigned YES manual down down

FastEthernet0/14 unassigned YES manual down down

FastEthernet0/15 unassigned YES manual down down

FastEthernet0/16 unassigned YES manual down down

FastEthernet0/17 unassigned YES manual down down

FastEthernet0/18 unassigned YES manual down down

FastEthernet0/19 unassigned YES manual down down

FastEthernet0/20 unassigned YES manual down down

FastEthernet0/21 unassigned YES manual down down

FastEthernet0/22 unassigned YES manual down down

FastEthernet0/23 unassigned YES manual down down

FastEthernet0/24 unassigned YES manual down down

Vlan1 unassigned YES manual administratively down down

Vlan10 192.168.10.254 YES manual up up

Vlan20 192.168.20.254 YES manual up up

Vlan30 192.168.30.254 YES manual up up

Vlan50 192.168.50.254 YES manual down down

Switch#

Inter vlan routing problem

kcnajaf — Wed, 02 Oct 2013 07:18:07 GMT

Hi,

Ok fine..

Forget about my previous post then.

Have you created a L2 vlan for vlan 50 here? If not try

config terminal

vlan 50

name managment

exit

After this if this is still not working could you please share the output of below command from this L2 switch.

sh ip int brief

sh vlan

sh int trunk

sh cdp nei details

Regards

Najaf