Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

VLAN PROBLEM

Hi I am having problem with the vlan, defined a switch port as part of a new vlan. To which I have connected a Cisco Fasthub, I can not logg on to my local network.

If i plugg the fasthub to another port not part of any vlan, i can connect to the local network

I am not familiar with switches that much, can you please help me

thanks

2 REPLIES
New Member

Re: VLAN PROBLEM

All ports (by default) are assigned to VLAN 1 - therefore by default all devices plugged into your switch can communicate because they are all in VLAN 1. If you create another VLAN and add a port to this VLAN, the devices connected can only communicate with other devices in the same VLAN. If you really want to create a new VLAN, and talk between VLAN's, you need to introduce intervlan routing which may become complex. For ease though, it may prove best to assign all ports to the same VLAN to get your FastHub up and running.

New Member

Re: VLAN PROBLEM

Hi

The default management Vlan is Vlan 1 all ports and the switches IP address on 1. Vlans are broadcast domains which means that they cannot communicate between each other without a MLS switch or router.When you create a additional Vlan on the switch and connect the hub too a port on the new vlan it will only communicate with a device in the same vlan. If you plug the hub into a port in Vlan 1 you should be able to communicate with the rest of the network. If you must have more than one vlan you should consider Cisco switches with trunk ports, or a Cisco router configurer for interVlan routeing. I hope this is helpful.

D Williams

CCNA

donalwil@cisco.com

95
Views
0
Helpful
2
Replies