GS110TP Vlan membership

[andmag]

Hi,

Set a trunk between GS110TP and Cisco 3750.

I need port 6 to be in vlan 50. Port 8 is the trunk to the 3750.

Port 8 with vlans 1, 50 set to Tagged

Port 6 with vlan 50 set to Untagged

Port 6 removed vlan 1

PVID is set to 1 cause vlan 1 is the native vlan on the 3750.

If I plug a pc in port 6 I don't get an ip from the dhcp server.  From the 3750 onwards everything works fine - problem is from the netgear.

[schumaku · Accepted solution]

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@andmag wrote:

Het a trunk between GS110TP and Cisco 3750.

I need port 6 to be in vlan 50. Port 8 is the trunk to the 3750.

---

OK. Is that "native" VLAN 1 tagged on that port, too?  

---

@andmag wrote:

Port 8 with vlans 1, 50 set to Tagged

Port 6 with vlan 50 set to Untagged

Port 6 removed vlan 1

PVID is set to 1 cause vlan 1 is the native vlan on the 3750.

---

Why oh why? You don't want the native VLAN ID 1 on that port, do you? Here is the mistake: Setting the PVID on port 6 to VLAN ID 1 will bring incoming frames into the VLAN ID 1 ... not as expected into the VLAN 50. Set the PVID for the access port 6 along with the untagged VLAN to the ID 50 and it will work.

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@andmag wrote:

If I plug a pc in port 6 I don't get an ip from the dhcp server.  From the 3750 onwards everything works fine - problem is from the netgear.

---

Whatever a native VLAN is ... assuming the tagged / VLAN trunk config on the 3750 port is right ... probably yes.  

[schumaku · Accepted solution]

---

@andmag wrote:

Het a trunk between GS110TP and Cisco 3750.

I need port 6 to be in vlan 50. Port 8 is the trunk to the 3750.

---

OK. Is that "native" VLAN 1 tagged on that port, too?  

---

@andmag wrote:

Port 8 with vlans 1, 50 set to Tagged

Port 6 with vlan 50 set to Untagged

Port 6 removed vlan 1

PVID is set to 1 cause vlan 1 is the native vlan on the 3750.

---

Why oh why? You don't want the native VLAN ID 1 on that port, do you? Here is the mistake: Setting the PVID on port 6 to VLAN ID 1 will bring incoming frames into the VLAN ID 1 ... not as expected into the VLAN 50. Set the PVID for the access port 6 along with the untagged VLAN to the ID 50 and it will work.

---

@andmag wrote:

If I plug a pc in port 6 I don't get an ip from the dhcp server.  From the 3750 onwards everything works fine - problem is from the netgear.

---

Whatever a native VLAN is ... assuming the tagged / VLAN trunk config on the 3750 port is right ... probably yes.  

[andmag]

Thank you for helping me out. That worked of course

[schumaku]

Thank you for comprehensive and detailed information @andmag  - that made it easy, you helped a lot to s speedy answer!