Chandhuru,

I made some changes and it working now.

Kindly configure the following and you should be able to ping and telnet to the switches between the layer 2 switches.

1- Remove the Vlan 1 configuration and configure vlan 10 and 20 respectively on the Core switch.

3560:

GigabitEthernet0/2     unassigned      YES unset  down                  down

Vlan1                  192.168.1.1     YES manual up                    up

Vlan10                 192.168.10.1    YES manual up                    up

Vlan20                 192.168.20.1    YES manual up                    up

b- Switch 2960- A

Vlan10                 192.168.10.2    YES manual up                    up

Switch#

c- Switch 2960 -B

Vlan10                 192.168.20.2    YES manual up                    up

Switch#

Make sure the port is trunk and its negotiated.(Switchport mode trunk, Switchport trunk encapsulation dot1q,)

Telnet configuration:

Switch 1 & Switch 2

Switch#conf t

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

Switch(config)#username cisco password cisco

Switch(config)#enab

Switch(config)#enable se

Switch(config)#enable secret cisco

Switch(config)#line vty 0 4

Switch(config-line)#lo

Switch(config-line)#logi

Switch(config-line)#login local

Switch(config-line)#pas

Switch(config-line)#password cisco

Switch(config-line)#end

Switch#

Switch#telnet 192.168.20.2

Trying 192.168.20.2 ...Open

User Access Verification

Username:cisco

Password:

Switch>en

Password:

Switch#exit

I just tested and its working fine now.

HTH

Regards

Inayath

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