Leo Laohoo Sun, 05/16/2010 - 23:49

VLAN and VTP  is NOT Layer 3 routing.  What appliance running CatOS are you talking about?  What's your design.  Judging from your line of questioning you've got everything working against you.

Anjan Kumar Sun, 05/16/2010 - 23:59


i would like to make inter routing between Vlans.....so i dont have any router which supports subinterface with dot.q encapsulation.

thinking.....instead of setting up router on stick i can make it with layer 3 switch.

so what you suggest for this?



Anjan Kumar Mon, 05/17/2010 - 00:20

i dont have appliance...

Actually  my network is having these devices.

1.Cisco 2948G-GE-TX ----1no

2.Cisco 2950 ------3 no

3.Linksys -------4no

4.HP Procurce----5no

i think no where i can configure VTP with non cisco devices, there is only one solution is manual vlans.

can you give me some sugessions ....



Leo Laohoo Mon, 05/17/2010 - 00:28


Geez.  If you don't need additional ports for the Layer 3 CatOS switch, then I recommend you get a cheap Cisco router to do your dot1q trunking.  The router you need should have FastEthernet or GigabitEthernet WAN ports.

Like I mentioned in my first post, what you are trying to do is a prime candidate for failure.  I have no idea what the Linksys and HP Procurve you are using can/can't do particularly with dot1q trunking.

I do pray that this is not a production network.

Giuseppe Larosa Tue, 05/18/2010 - 02:29

Hello Anjan,

post a sh module of:

1.Cisco 2948G-GE-TX ----1no

a specific routing engine is required to perform intervlan routing it is not only a question of CatOS version.

if that part is missing as suggested by Leo you could go for a 3560 multilayer switch

Hope to help


Ganesh Hariharan Mon, 05/17/2010 - 00:07

Hi Mates,

i would like to know which cat os supports or devices supports layer 3 routing?

bcoz , i want to make VLan with VTP




As suggested by Leo vlan with vtp is normal function of switches it is not related with layer 3 routing, any how checkout the below link on intervakn routing support on cat series switches.Hope that clear your query !!



Arup Dutta Mon, 05/17/2010 - 00:32

Hi Anjan,

             you should go through hardware 3650 to on words.3650 is smart L3 switch.

i hope you will helpfull.


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