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Forum Discussion

mschle's avatar
mschle
Aspirant
May 30, 2022
Solved

GS108E not accessible over tagged VLAN

Hi all, I have a backbone switch which is connected to several GS108(P)E v3 switches. The uplink port contains 3 VLANS (30,31,32) which are tagged on that port. These switches distribut the 3 VLANs ...
  • mschle's avatar
    mschle
    May 30, 2022

    Thanks Kurt,

     

    I re-thought everything after reading your post and concluded it could not be something on the GS108E v3 which were setup identically. So it had to be something on the backbone. I finally noticed that accessible GS108E v3 were connected to a port which had the PVID of the VLAN I want to contact the GS108E v3 over. I never expected this PVID to be of any influence on the tagged ports. After I set the PVID on the tagged ports on the backbone switch correctly I was able to manage the GS108E v3 centrally over the backbone / WLAN.

     

    Thanks again - M.

schumaku's avatar
schumaku
Guru - Experienced User
May 30, 2022

Most of these Web configurable switches are not built on a managed switch core with a management VLAN and a management core handled by an untagged management CPU connected to an internal untagged port. There is a small microcontroller listening on all frames passing the switch, taking care on e.g. ICMP multicast or the managment IP stack. No management VLAN, the controller does not deal with tagged frames.

 

Technically, it does not matter over which VLAN the untagged management frames are going in and out of the microcontroller, relevant is just the IP subnet and IP adddress.

 

For simplicity, run the management VLAN for these "Plus" switches untagged on the wired backhaul all over your network, keep all other VLANs tragged.

 

Few newer 10 GbE and Multigig Plus switrches (xxnnnEx) are implemented on a management core - there is a proper management CPU on a management VLAN. These behave more like a managed switch - something these Web managed Plus switches were never intended for.

 

Regards

-Kurt

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