Device will not work on VLAN

Using a switch sg300-52, I created two VLAN that share a port of access to the internet. All features original, added to the VLAN work correctly and I therefore believe that them VLANS are configured correctly. I added a new office and an old laptop to the VLAN and none worked. I could get my computer to work by activating the VLAN tagging in the network card. The laptop is 5 years old and it doesn't have such a setting in the network card. There are 2 other devices that share the same port with the laptop and both work properly. My conclusion is that the laptop does not support tagging VLAN. Y at - it a way to configure the switch to account for this?

Hi Thomas,

I wonder if something as simple as an access-list (or filtering) will do what you want to do.  The only problem is that devices which must limit must have set the parameters IP. (or statically defined through DHCP)

Here is an example of a list of acess that I took of my SF300 - 48P, note that the access list (ACLs) must be attached to a switch for monitor port or filter packetings in the coming switch to an IP host port.  In other words, the acl check matches the model, in the case below on the IP addresses on the infiltration in the switch port.

Since the new release of firmware version 1.1, we now able to paste in an accessible via telnet, SSH or console (CLI) command line interface when the switch is in Setup mode. You can get into configuration mode by typing the command "config."

Changes in the CLI are immediately reflected in the GUI.  If you do not the following access list, the last command could be 'write' save the configuration in the memory of switches.

Note: If you are not comfortable with the use of the CLI to GUI to create the following lists of access and ACE and link the ACL to a switch port.

I have in the example below, established a list of access to two ports, ports fastethernet1 and gigabitethernet1.

Please note: ACL uses subnet reverse masking, which normally means, you must specify a specific IP host by the next note;

192.168.20.5 255.255.255.255 with market back, this mask must be set as 192.168.20.5 0.0.0.0

As a packet enters a port of a host IP switch, the access list is inspected from top to bottom, as soon as a match is found, the access list as you exit.  There is normally an implicit deny at the end of an access list, that's why my last statement in two access lists should allow any source IP address goes to any other destination IP wise the IP host might not get to the router WAN and Internet.

The first IP address in the list below is the source IP and the mask and the second IP address is the destination IP address and the mask.

room200 extended IP access list

IP 192.168.20.62 enable 0.0.0.0 192.168.20.100 0.0.0.0

IP 192.168.20.62 enable 0.0.0.0 192.168.20.63 0.0.0.0

refuse the 192.168.20.62 ip 0.0.0.0 192.168.20.0 0.0.0.255

allow an ip

output

The following applies to the access list for a switch port

interface fastethernet1

Service-acl input room200

output

room225 extended IP access list

IP 192.168.20.63 enable 0.0.0.0 192.168.20.100 0.0.0.0

IP 192.168.20.63 enable 0.0.0.0 192.168.20.62 0.0.0.0

refuse the 192.168.20.63 ip 0.0.0.0 192.168.20.0 0.0.0.255

allow an ip

output

The following applies to the access list for a switch port

interface gigabitethernet1

Service-acl input room225

output

It's the best way to contral access in this vlan and the filter will run at wire speed.

Best regards, Dave

Tags: Cisco Support

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