Cisco Small Business Switch VLAN Configuration

I am using the SG300-52 . I am able to change the mode into layer 3 and am now configuring the ip addresses for the VLANs . I am following this discussion on https://supportforums.cisco.com/discussion/11177961/sg300-10-layer3-intervlan-routing. I will update you on how it goes.

Hlw Rene,

You are the Best One! One small questions to you… why we will use SMB switch ? Is there any advantage to using it over Cat/ME switch . Actually i am very new to such a Switch.Thanks

br/zaman

Mohammad,
A true Catalyst switch certainly has many more features, but it is all about the price. For example, a 48-port SMB switch is about $1650 USD while a low end 48 port Catalyst switch is $3200 USD. Many businesses don’t want to spend the extra money (and unfortunately mine is one of them!)

Now got the point.Thanks dear :slight_smile:

19 posts were merged into an existing topic: Cisco Small Business Switch VLAN Configuration

Hi Rene,
How can we login to SG300 switch for GUI ?? I am facing trouble ,Cannt login using UTP cable ,Please assist me. Thanks

br//zaman

Hello Mohammad.

The SG300 switch has both a command line interface and a GUI interface. You are also able to use a console connection. For detailed information on how to initially connect to such a device, check out Cisco’s quick start guide.


If you are unable to connect due to lost passwords, you can follow the password recovery procedure at this Cisco support forums thread.

Finally, if you are unable to get a web interface page up and running when navigating to the correct IP address, the port being used for web access may have been changed. In this case, you should be able to change that via the CLI.

I hope this has been helpful!

Laz

Can you give a brief explanation of GVRB? is that like VTP on traditional switches?

Hello Jason

If I’m not mistaken, I believe you are referring to GVRP, or Generic VLAN Registration Protocol. This is a generic open protocol that is similar to VTP in that it shares VLAN information between multiple switches. It allows cross platform compatibility between switches of multiple vendors to share such information, whereas VTP is a proprietary protocol used by Cisco devices.

GVRP has now been replaced with MVRP or Multiple VLAN Registration Protocol which essentially does the same thing.

I hope this has been helpful!

Laz

Can the Cisco Small Business Switch allow one configure a port with a data vlan and voice vlan to connect a phone and a computer to the same switch port? I have tried to do this on this switch many times without success. What I’ve had to do is to create a vlan for the phone and vlan for the computers and then assign one of the ports just to the phone and the another port just for computers (data vlan). Thanks in advance for all your help!
MGO

Hello Martha

Yes, it is possible to do with the SG switches. You can take a look at this Cisco Video that describes this configuration. It is on the SG500, but this is similar to the other switches in the series.

I hope this has been helpful!

Laz

Hello Laz,
Again thanks for all your help. I have seen this video before and I followed the instructions. The problem though is that after I set up the port with both the data and voice vlan, the phone is unable to acquire an ip address via dhcp. It is very strange because for instance, lets say I get my sg300 switch and I create vlan 10 for data and vlan 20 for voice. If I set up the port 1 as an access port with vlan 20 and connect the phone, the phone is successful in getting an ip address with dhcp. I create port 2 with vlan 10 data and vlan 20 voice, connect the phone to the switch port and daisy chain the computer to the phone. Ei:
SWITCH_PORT_2---------PHONE----------COMPUTER
Then, the computer is able to get an ip via dhcp but the phone will not get an ip. If dont know if the following is true because I vaguely remember… but I think I read somewhere that the ports on the small business series can only get one session of dhcp. I dont know how true this is. It seems like Cisco support is not very vocal on this topic as I looked on the forum for small business extensively (but again, this was a while back). Let me know your thoughts, I am interested to know what you think. Regards, MGO

Hello Martha

Thanks for the clarification. The only thing I can suggest is when you configure the ports, make sure that the voice VLAN is indeed tagged while the data VLAN remains untagged. This is usually indicated with a “T” or a “U” that appears beside the VLAN on the configuration of the port. On the “Port VLAN Membership” page you can verify this.

Have you attempted to implement this on another SG switch? Could it be that there is an issue with the specific device?

After learning these concepts on more advanced switches, it is difficult to go to a web based system and have them work in the same way. It is not as intuitive, and because I have worked with these switches, it does take some time to fully understand the difference in philosophy.

I hope this has been helpful!

Laz

Yes Laz,
I have attempted it on different switches of the same series, even by using the CLI, which is also very different from the cli from catalyst switches. In my organization, I have resolved that if I want a phone on its own vlan, I have to assign its own port because otherwise it will not get an ip. Thank you for all your help!

Hi Laz,
this is the first time i have to use a small business switch in my office: this is a 220 model which is very similar to the 300. So i am reading the course “small business switch configuration”
Can you answer the following questions please ?

  • do the SMB series come from linksys ? (i read that there are not native cisco devices)
  • so where do the CLI commands come from ? because there are quite different from the classic IOS i know. Did Cisco build them from classic IOS to adapt to devices small business ? (or from scratch, or do they modify existing linksys OS to look like IOS)
  • for example, i am very surprised that you can’t set the IP management from the console: you have to put a PC in a predefined subnet to take control of the switch. I am desappointed of this behaviour
    Thanks
    Regards

Hello Dominique

The SMB switches are indeed different than mainline Cisco devices. I too have had trouble understanding the logic behind their configurations for both CLI and web-based configurations. The truth is that Cisco purchased Linksys in 2003 and started providing small business level devices with the Cisco-Linksys brand name. In 2013 Cisco sold Linksys, but continued to sell their own line of small business series switches, now under the Cisco brandname alone.

It seems that Cisco kept the configuration logic of the Linksys devices in its small business series. They incorporated some logic of the IOS system, but kept the core configuration philosophy of Linksys.

I too am disappointed in some of the features and limitations of these devices, but unfortunately that is how they’ve developed them.

I hope this has been helpful!

Laz

HI,

At work I saw some Dell switches that are configured with the tagged vlan for the uplink and the Untagged vlan for the access port at the same time in the same port.

For example:

server–>SW1(untagged)---->untaggedWCS—>(100_taggeduplink)

es:

interface Vlan 50
 no ip address
 tagged Port-channel 100
 untagged Port-channel 30
shutdown

Can you explain me how it works??
Does cisco switches provide the same feature?

Thanks.

Hello Giovanni

I am not familiar with Dell networking equipment, but looking over some of their manuals, my understanding is that the above configuration places VLAN 50 on two ports: on port-channel 30 as untagged and on port-channel 100 as tagged. What this means simplly is that port-channel is an access port (I assume connected to the server in your diagram) and port-channel 100 is a trunk port that is the uplink.

In Cisco device, you would configure this like so:

Switch#conf t
Switch(config)#interface gigabitethernet 0/1
Switch(config-if)#description connection to server
Switch(config-if)#switchport access vlan 50
Switch(config-if)#exit
Switch(config)#interface gigabitethernet 1/1
Switch(config-if)#description uplink
Switch(config-if)#switchport mode trunk
Switch(config-if)#switchport trunk allowed vlan add 50
Switch(config-if)#exit
Switch(config)#

According to this Dell command line reference, it looks like the command tagged followed by the interface simply adds the VLAN to the trunk configuration of that interface.

I think it may be confusing because of the fact that the configuration you show also includes an interface called VLAN 50. I’m not sure if this is an SVI or if this is simply the way that the VLANs are created, and then under this configuration, you specify on which ports the VLAN will be included, either tagged or untagged.

I hope this has been helpful!

Laz

Hello all,
I have an SG300-10, Confugured the VLAN’s as follows:
1 1 V
10 10 gi1-8,Po1-8 D
100 Internet gi10 S
IP Adresses:
192.168.100.251/24 vlan 100
192.168.101.252/24 vlan 10
Internet is on 192.168.100.254 connected to gi10
I can ping the switch from VLAN10 and VLAN 100 also with a host on it, the switch can ping the hosts on each VLAN and to the Internet GW, still I cant do inter VLAN pings neither access the internet GW.
Also if I try to set up the DHCP for the VLAN’s Network Pools, inside DHCP Server Options and adding the VLAN into the DHCP Options it asks for a code which I can’t insert cause it replys with “Selected option cannot be configured by user.” message.
Thanks in advance for your very appreciated Help.

Hello Tomas

First of all, I suggest you take a look at this lesson which details how to configure an SG300-10 switch. There you might find some information that will be helpful:

Now concerning your specific questions:

At first glance there doesn’t seem to be anything wrong with your config. If your hosts are configured with the correct gateway (i.e. the IP of the VLAN SVI) they should communicate. Now having said that, and after some research, I see that by default, the SG300 operates in Layer 2 mode. This means that interVLAN routing is disabled. Take a look at this documentation that shows how to change this:

Hmm, that’s interesting. Can you share a screenshot of this so we can help you further?

The truth is that I don’t really like the setup of the SG300. It doesn’t seem as intuitive compared to Cisco catalyst switches. In any case, let us know how you get along so we can help you further.

I hope this has been helpful!

Laz