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How do I set up vlan trunking on SG200

I have an SG200 with two vlans. VLAN 1 (default), and VLAN 3. Port 1 of the SG200 is an access port in VLAN 3. Port 24 is a Trunk port with 1UP and 3T. 

This port is connected to an HP 2920 Layer 3 switch. The port on the HP that is connected to the SG200 has VLAN1 untagged, and VLAN3 tagged to it.

The HP switch has several devices in VLAN3.

The SG200 can ping each of the devices in vlan 3 on the HP. 

The HP switch cannot ping the device on port 1 of the SG200, and the SG200 cannot ping the device on port one either. 

The HP switch DOES get the MAC address of the PC on the SG200 in its arp cache.

I cannot figure out how to make devices on VLAN3 on the SG200 talk to the rest of the network.

Community Member

Can you post the ipconfig

Can you post the ipconfig info of the PC and the config of the SVI on the HP?

Community Member

Here you are: IPconfig from a

Here you are:


IPconfig from a PC connected to the SG200:

Ethernet adapter Local Area Connection 2:

   Connection-specific DNS Suffix  . :
   IPv4 Address. . . . . . . . . . . :
   Subnet Mask . . . . . . . . . . . :
   Default Gateway . . . . . . . . . :

HP SVI Interface config:

vlan 1
   name "DEFAULT_VLAN"
   no untagged 1-17,23-24
   untagged 18-22,A1-A2,B1-B2
   ip address
   ip helper-address
vlan 3
   name "Irvine Local LAN"
   untagged 1-17,23-24
   tagged 18-22
   ip address



Hello,One thing I notice is


One thing I notice is that your IP helper address for VLAN 1 is the same as your IP for the PC, so I'm guessing that IP is some sort of DHCP server, which may be causing a conflict.

Since the SG200 can ping devices in VLAN 3, and it is in VLAN 1 (since that is the default) then we know the trunk and routing seem to be working correctly.

Has anything been able to ping that host?  Have you checked the firewall on the host, most of them will block pings from other subnets by default.  

You can also try running a traceroute from various places and see where the traffic stops, that device will either be blocking or routing incorrectly.  Of course any device in the same subnet/VLAN should just go directly there without any hops, so that would again point to a firewall issue, or possibly a missing return route if it is from a different VLAN.

Let me know if any of that helps,

Christopher Ebert - Network Support Engineer

Cisco Small Business Support Center

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Community Member

Hello, I'm having a similar


I'm having a similar problem with a trunk port to a Cisco ASA.   Did you ever come up with a solution to your problem?

Community Member

So, you are having the EXACT

So, you are having the EXACT same issue? Can you describe your setup? 

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