Multilayer Switch troubleshooting

[mazharsaeedms1]

I have two network 131.107.X.X/16 and 172.25.29.232/29, I want to communicate both network with each other, please need your suggestion.

Attach snap topology is given. without any changes in topology, how communication is possible??

[Ganesh Hariharan]

Hello ,

Create trunk between 2960 and 3560 switch allowing network A VLAN and create an SVI for network A in 3560 switch which would be the gateway for all host in network A.

Create a Point to point link between router and 3560 over /30 subnet for static routing or if you want to do via dynamic that can be also done.

Lets suppose you choose static then put a static route towards 3560 interface which is directly connected via router and in 3560 drop a default route toward router interface.

By doing above you have connectivity between networks.

Hope it Helps..

-GI

Rate if it Helpss

[mazharsaeedms1]

Hi Ganesh Hariharan,

Please look into running config of Cisco 2960 switch and Multilayer switch 3560:

2960:

interface FastEthernet0/1

switchport trunk allowed vlan 3,12

switchport mode trunk

!

interface FastEthernet0/2

switchport access vlan 3

switchport mode access

!

interface FastEthernet0/3

switchport access vlan 3

switchport mode access

!

interface FastEthernet0/4

switchport access vlan 3

switchport mode access

!

interface FastEthernet0/5

switchport access vlan 3

switchport mode access

3560

interface FastEthernet0/1

switchport trunk allowed vlan 3,12

switchport mode trunk

!

interface FastEthernet0/2

switchport access vlan 12

switchport mode access

tx-ring-limit 3

!

interface Vlan3

ip address 131.107.0.1 255.255.0.0

!

interface Vlan12

ip address 172.25.29.237 255.255.255.248

819 HGW Router:

interface GigabitEthernet0

ip address 172.25.29.237 255.255.255.248

duplex auto

speed auto

!

After configuration i cant ping both PCs from network A to Network B

[Ganesh Hariharan]

Hello ,

You have same ip address configured on VLAN 12 on L3 switch and on router interface Gig0.

Change the ip address at router level to 172.25.29.238 255.255.255.248 and configure a route in router for VLAN 3 subnet 131.107.0.1/24 towards 172.25.29.237.

and in L3 switch configure a default route 0.0.0.0/0 172.25.29.238 255.255.255.248

Hope it Helps..

-GI

Rate if it Helps..

[mazharsaeedms1]

Hi,

after changes same result.

[Ganesh Hariharan]

Are you able to ping router interface from 3560 switch ?

and could you please share the show run in 3560 and in router .

-GI

[mazharsaeedms1]

sure have look Router & MLS 3560 Running Configuration:

C819HGW:

ip dhcp excluded-address 10.10.10.1

!

ip dhcp pool ccp-pool

network 10.10.10.0 255.255.255.248

default-router 10.10.10.1

spanning-tree mode pvst

interface GigabitEthernet0

ip address 172.25.29.238 255.255.255.248

duplex auto

speed auto

!

interface FastEthernet0

interface Wlan-GigabitEthernet0

description Internal switch interface connecting to the embedded AP

!

interface wlan-ap0

description Service module interface to manage the embedded AP

ip unnumbered Vlan1

interface Vlan1

description $ETH-SW-LAUNCH$$INTF-INFO-HWIC 4ESW$

ip address 10.10.10.1 255.255.255.248

!

router eigrp 100

network 172.25.0.0

network 131.107.0.0

no auto-summary

ip route 0.0.0.0 0.0.0.0 FastEthernet0

MLS 3560:

interface FastEthernet0/1

switchport access vlan 3

switchport mode access

!

interface FastEthernet0/2

switchport access vlan 12

switchport mode access

interface Vlan3

ip address 131.107.0.1 255.255.0.0

!

interface Vlan12

ip address 172.25.29.237 255.255.255.248

!

router eigrp 100

network 172.25.0.0

network 131.107.0.0

no auto-summary

ip route 0.0.0.0 0.0.0.0 172.25.29.238

can you please assist me through email, i have sent Packet tracer file to you for better understand what i want, because in my real scenario is same as I depict in this topology. please share your email address.

[InayathUlla Sharieff]

Can you attach the pkt tracer file to this post?

[glen.grant]

  What interfaces are you using to connect between the 3560 and router ?   You will need to connect those 2 devices with a link using a /30 subnet .  I don't see that in your  configs .  and then create statics pointing to each others subnets across that link unless you are using routing protocols between the 3560 and the router .  Also you really don't need any kind of trunking between the 2960 and the 3560 seeing it's a single subnet  it can be made an access port in vlan 3  on both sides .

[mazharsaeedms1]

please find attach file

[Austin Sabio]

The concept is to configure:

A- Inter-VLAN routing.

B- SVI.

Ref: 

http://www.cisco.com/c/en/us/support/docs/lan-switching/inter-vlan-routing/41860-howto-L3-intervlanrouting.html

http://www.cisco.com/c/en/us/support/docs/lan-switching/inter-vlan-routing/14976-50.html

hope it helps, 

Aus