GS1900-10HP - connection to VLAN trunk using a transparent bridge fails

Vodoca

I have Aruba 9004 gateway, Aruba 6200F switch and ZyXEL GS1900-10HP switch.
I have working VLAN configuration with 501,502,503,80 VLANs where Aruba 9004 is DHCP server. See the picture.

If I connect a CAT5E cable directly between Aruba 9004 port 3 and ZyXEL GS1900 port 9 Trunk, everything works and both ZyXEL and Aruba switches have VLANs available on configured ports and recieve IPs from DHCP.

As soon as I add a simple media converter (tried 3 different types - optics, VDSL) between Aruba 9004 and ZyXEL 1900, VLANs stop to work and no VLAN traffic passes through.

When I connect the same cable from media converter to a trunk port on Aruba 6200F, it works ok and VLANs are available on both ZyXEL and Aruba switches.

What could be wrong there?

 Aruba 6200F switch

Vodoca

The problem was MikroTik S-RJ01 SFP Module, which is written to be  10/100/1G but appearently it did not work properly with SFP port of the ZyXEL switch, it did not negotiate speed well probably.  Port 8 as trunk works well.

SFP port with MikroTik S-RJ01 also showed as Fiber on the homescreen - switch schema, probably either ZyXEL or MikroTik problem.

Vodoca

The problem was MikroTik S-RJ01 SFP Module, which is written to be  10/100/1G but appearently it did not work properly with SFP port of the ZyXEL switch, it did not negotiate speed well probably.  Port 8 as trunk works well.

SFP port with MikroTik S-RJ01 also showed as Fiber on the homescreen - switch schema, probably either ZyXEL or MikroTik problem.

Zyxel_Melen

Hi @Vodoca

You can try the Zyxel transceivers which are guaranteed to be compatible since they're fully tested and verified with our switch.
And the similar module with MikroTik S-RJ01is Zyxel SFP-1000T.
For other 3rd party ones, the compatibility is not guaranteed because there are numerous SFP in the market. It is impossible to verify all of them.