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Forum Discussion
VLAN Puzzle
I would appreciate assistance diagnosing a VLAN problem. Now that many homes have Ethernet cables installed from most rooms to a central patch panel, some users find that the patch panel is not a gre...
Yes. Did so this morning.
In AP mode, the RBR750 appears on the primary network with 2 IP addresses:
192.168.1.115, and
192.168.2.1
The RBS750 appears with one IP address:
192.168.1.118
When the Ethernet cable is connected to perform the switch from WiFi backhaul to Ethernet backhaul, VLAN 4093 frames immediately appear.
Connected a Samsung tablet to the Guest WiFi on the satellite. Was assigned IP 192.168.2.2. Does not appear on the primary network Attached Devices (hidden by 750 NAT), but does appear on the 750 Attached Devices. Tablet can browse the web, etc.
Switch configuration is:
VLAN 1 - Ports 1,5 (1 is untagged. 5 is tagged for WAN traffic)
VLAN 2 - Ports 2,3,4,5 untagged
VLAN 4093 - Ports 2,3,4,5 tagged
Works exactly the same as two switches. The key is setting up two VLANs, one not tagged and VLAN 4093 tagged on both the router LAN port and the port leading to the satellite.
Can you try the following on your one switch instead of 4093?
VLAN 4091 - Ports 2,3,4,5 tagged, then change to 4090 please.
Please post your findings for both.
And what ports are you using for the connection between the RBR and the RBS on your switch?
On this switch, port 2 is connected to the RBR750 LAN and port 4 is connected to the RBS750 LAN. This is the same switch that I used to perform the original VLAN setup:
Switch 1:
Port 1 to router WAN port. VLAN 1 untagged
Port 2 to router LAN port, VLAN 2 untagged and VLAN 4093 tagged
Port 5 to switch 2, VLAN 1, 2, 4093 all tagged
Switch 2:
Port 1 to internet connection. (in my case the Orbi RBR50 network) VLAN 1, untagged
Port 2 to RBS750, VLAN 2 untagged and VLAN 4093 tagged
Port 8 to switch 1, VLAN 1, 2, 4093 all tagged.
It is not clear to me what setting different VLANs on switch ports can accomplish. When I capture a straight cable connection between the router and satellite (no switches at all), VLAN 4093 is the only VLAN observed. That is what led me to add VLAN 4093 to the switch configuration. (after Kurt pointed out that I was not reading the switch user manual correctly) Since neither the router nor the satellite output frames with any VLAN except 4093, setting ports to any other VLAN will simply be reverting back to the original setup where the VLAN frames "disappear".
Please try 4090 and 4091 separately.
Possible that the numbers may not change anything. I was old that the number are just trunk protocols. Checking to see if these are specific to the Orbi or may not be specific.
Can you also try just tagging all ports for VLAN ID 4091 and don't configure VLAN 1 and 2. Im curious if these are needed for the Orbi or not. My recent switch test I only tagged all for 4091 for all ports and GN worked behind the RBS. Wondering if there maybe a difference in newe GN networking vs older GN networking. Trying this should reveal that it doesn't work or it does work. Something may be specific with the AX systems.
Today's test was captured in this file: https://www.dropbox.com/scl/fi/xi4gyzt5tm8pfltafzdud/May5-test.pcapng?rlkey=bamhbzdgvn4rakjr7x2fzfgyk&dl=0 With the system in AP mode and the satellite connected via WiFi backhaul, the Wireshark capture was started and then the Ethernet cable was connected.
Because the RBR750 is in AP mode, all sorts of stuff leaks from the primary network onto the link between RBR750 and RBS750. None of it has any VLAN tag. The only packets that show any VLAN tag are:
- Packets to/from a device connected to the satellite Guest WiFi
- Packets to/from the satellite 5G WiFi MAC and the router 5G WiFi MAC.
- The VLAN tag is always 4093.
When I performed the same experiment using the original RBR50/RBS50, there were zero VLAN frames. I put this down to Netgear changing the Guest WiFi implementation for the AX product.
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