I have two SG300's, one is setup as Layer 3 and the other is setup as Layer 2.
On the Layer 3, I have voice vlan 100 setup with IP 10.10.10.1. I have turned off Spanning Tree and Smart port. Vlan 1 is setup for all other devices on the network. All phones and PC's work fine on this switch. The phones communicate with a server that is plugged into a port with access to 100.
On the Layer 2, I have auto voice vlan 100 and do not have an interface for the voice vlan. I also have STP and Smart Port disabled. Vlan1 is configured as well.
All ports on both switches are configured as:
switchport mode trunk
switchport trunk native vlan 1
switchport trunk allowed vlan add 100
So 100 is tagged and 1 is untagged. Like I said, works fine on the L3 switch. On the L2 switch, all PC's are working fine and able to communicate with all PC's but the phones are not working in the voice vlan. They are not communicating with the phone server which provides their DHCP.
Any suggestions? The trunk port between the two switches is configured the same, trunk mode with 1 untagged and 100 tagged.
The phone is not even remaining in vlan 1, vlan 1 has a DHCP server as well and it's not getting an IP from there. It goes no IP from either DHCP server. If I assign it an IP in the VLAN 100 scope, it is not pingable from the phone server in that VLAN. It's almost like it has a connectivity issue.
On the layer 2 switch, connect a computer to access port 1. Does it receive DHCP?
Connect a computer to access port 100. Does it receive DHCP?
Is the default gateway of the DHCP server set correctly as the IP address of the switch VLAN address or somewhere else?
If you connect a computer on VLAN 100 from the layer 2 switch and configure it with the gateway address of the VLAN 100 IP (10.10.10.1) does it communicate to the SVI?
So to make the hypothetical situation.
VLAN 100 = 10.10.10.1
VLAN 1 = 10.10.1.1
DHCP server is vlan 100 untagged at IP 10.10.10.2 with gateway 10.10.10.1
Computer A located on the layer 2 switch to test both VLAN... to start VLAN 1 with an address 10.10.1.2 and gateway 10.10.1.1 on an access port and to test VLAN 100, 10.10.10.10 with gateway 10.10.10.1 from an access port.
Both of these scenarios should prove true. At the very minimum you should be able to ping the switch SVI for both VLAN assuming you have an active connection on the layer 3 switch (IE, your trunk link).
-Tom Please mark answered for helpful posts
Please mark answered for helpful posts
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