urgent help in router ?

[ccnamonsun]

Q1. Can we connect different VLANs with 1750 serise router. if any how can i tell me deatils

[Josef Oduwo]

Sunil,

You can connect different VLANs to a router using a trunk (an interconnexion between multiple switches and/or routers).

I trust that this is the same 2950 switch and the 1750 series router you referred to in an earlier post? If so please note that the 1700 series routers uses the IEEE 802.1Q protocol (aka "dot1q") for routing between VLANs and also that the 2950 switches only support dot1q trunking - a good thing...

Otherwise there is a plethora of excellent information on configuring routing among VLANS with dot1q encapsulation for the 1700 series router here (http://www.cisco.com/en/US/products/hw/routers/ps221/products_configuration_guide_chapter09186a008007cd23.html) including a IEEE 802.1Q encapsulation configuration task list, the VLAN command set for 1750s, and examples of IEEE 802.1Q encapsulation configuration.

For the 1751, go here http://www.cisco.com/en/US/products/hw/routers/ps221/products_configuration_guide_chapter09186a008008951b.html. This link http://www.cisco.com/en/US/products/hw/routers/ps221/products_configuration_guide_chapter09186a008007cd31.html#xtocid22 will give you a brush up on what the 1700 series can(not) do...

Cheers,

Josef.

[asd_asd_22]

yes, you can.

To connect different VLANs to your router connect your ethernet or fastethernet router interface to a trunk switch port, and then configure your interface with subinterfaces and dot1q encapsulation as following:

assume you have vlan 10 with subnet 10.0.0.0

vlan 20 with subnet 20.0.0.0

router(config)#interface ethernet 0.1

router(config-subif)#ip address 10.0.0.1 255.0.0.0

router(config-subif)#enqapsulation dot1q 10

router(config-subif)#no shutdown

router(config-subif)#exit

router(config)#interface ethernet 0.2

router(config-subif)#ip address 20.0.0.1 255.0.0.0

router(config-subif)#enqapsulation dot1q 20

router(config-subif)#no shutdown

router(config-subif)#exit

[tjeanne]

This feature is available on many platforms, but unfortunately not on 1750 series router. You can check the hardware/features compatibility matrix with the feature navigator tool:

http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp .

Choosing the "IEEE 802.1Q VLAN Support" feature will allow you to know every platforms supporting this feature.

Regards,

Tanguy