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Inter vlan Routing

Dear boss

I have cisco 3845 router  and 4507 & 2960 switch.  I have 4 Vlans on 4507  and connected to router on  four ports. Its working fine.

Now i want to create another vlan ( vlan 15 ) that trunk with vlan 20 and router port f0/0/1. i.e router F 0/0/1 ports belongs only two vlan(15,20) and need to intervlan routing. My conf. given below. but it is not working.

Switch conf:

interface GigabitEthernet3/1

description ## to router##

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 15-21

switchport mode trunk

interface Vlan15

ip address


interface Vlan20

ip address

interface GigabitEthernet3/2

description ## To local lan-15 ##

switchport acc vlan 15

interface GigabitEthernet3/3

description  ## To Local lan-20 ##

switch port acc vlan 20

ip route

Router conf:

interface FastEthernet0/0/1

ip address

ip flow ingress

ip flow egress

ip nat outside

ip virtual-reassembly

duplex auto

speed auto

ntp broadcast

standby 4 ip

standby 4 priority 140

standby 4 preempt

standby 4 track GigabitEthernet0/1

standby 4 track FastEthernet0/0/0

standby 4 track GigabitEthernet0/0


interface FastEthernet0/0/1.2

encapsulation dot1Q 15

ip address

How can i do intervlan routing as ping from vlan 15 to 20.


Hall of Fame Super Gold

Inter vlan Routing

Already replied in anothe thread, please do not open duplicates.gggggg