Hi Sreenath,
I am a Pre-sales Systems Engineer not a post sales professional, so this is my attempt to respond quickly to your request..
I tried your config in layer 3 mode on my loaner SG300-28P.
Sure seems faster to configure this via the GUI than the CLI.
Here is some CLI I produced for your setup, gotta admit I used the GUI to create the CLI.
Look at the VLAN section of your GUI interface, especially port to VLAN to be sure the VLANs are configured correctly. From your posting, i'm sure you fully understand VLAN tagged and untagged terminology
Sorry, I left yout the default route to 192.168.80.2
------------------ show version ------------------
SW version 1.1.0.73 ( date 19-Jun-2011 time 18:10:49 )
Boot version 1.0.0.4 ( date 08-Apr-2010 time 16:37:57 )
HW version V01
vlan database
vlan 10,20,30,80
exit
interface vlan 80
ip address 192.168.80.1 255.255.255.0
exit
interface vlan 10
ip address 192.168.10.1 255.255.254.0
exit
interface vlan 20
ip address 192.168.20.1 255.255.255.0
exit
interface vlan 30
ip address 192.168.30.1 255.255.255.0
exit
interface vlan 1
no ip address dhcp
exit
hostname SG300-28P
no passwords complexity enable
username dave password mypassword privilege 15
ip ssh server
no snmp-server server
ip http secure-server
ip telnet server
interface range gigabitethernet1-24
switchport trunk allowed vlan add 10,20,30
exit
All ports except my uplink ports 25-28 are tagged for all VLANs except VLAN80
Ports G125-28 are untagged in vlan 80. It seems very different to your configuration. I have to admit that sometimes it's just much easier using the GUI until the configuration is correct,
interface gigabitethernet25
switchport trunk native vlan 80
exit
interface gigabitethernet26
switchport trunk native vlan 80
exit
interface gigabitethernet27
switchport trunk native vlan 80
exit
interface gigabitethernet28
switchport trunk native vlan 80
exit
In this Config, VLAN1 is propagated on all switch ports Gi1-24 as untagged frames,
In this Config, VLAN 10,20,30 are propagated on all switch ports Gi1-24 as tagged frames
In this Config VLAN80 is propagated on all switch ports Gi 25-28 as untagged frames,
Unless there is a problem with supernetting VLAN10, Layer 3 switching between VLANs should work fine. I guess this is a example you can work from or discard
One thing also to check is to see if the IP routes come up. In my example below, no interface routes came up because I had nothing plugged into the switch. So if nothing is connected to a particular VLAN, no interface routes will appear.
SG300-28P# show ip route
Maximum Parallel Paths: 1 (1 after reset)
IP Forwarding: enabled
Codes: C - connected, S - static, D - DHCP
SG300-28P# show ip interface
IP Address I/F Type Directed Precedence Status
Broadcast
------------------- --------- ----------- ---------- ---------- -----------
192.168.10.1/23 vlan 10 Static disable No Valid
192.168.20.1/24 vlan 20 Static disable No Valid
192.168.30.1/24 vlan 30 Static disable No Valid
192.168.80.1/24 vlan 80 Static disable No Valid
If you have a issue, your switch is covered by a excellent warranty and you can speak to a technician to see what the problem might be, It would be interesting to refer them to this posting. Contact SBSC via the following URL;
http://www.cisco.com/en/US/support/tsd_cisco_small_business_support_center_contacts.html
regards Dave
