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Forum Discussion
GS308T
GS308T s/w 1.0.5.12 - one port connected router-on-a-stick; other ports to various clients.
It is unclear from the manual what is the order/priority of Mac-based VLANs and protocol-based VLANs. Are there separate tables for Mac-based VLANs and protocol-based ones? I assume not; however if there are, which is looked up first? Per the manual...
MAC-based: When untagged or priority-tagged packets arrive at the switch and entries exist in the MAC-to-VLAN table...
Protocol-based: By default, if you do not configure any port-based (IEEE 802.1Q) or protocol-based VLANs, untagged packets are assigned to VLAN 1.
This seems to imply that you can assign MAC-based VLAN (such as one not created on the switch) then add a port-based or protocol-based one.
It would be nice to have a logic diagram of the flow of a packet.
Thank you.
9 Replies
Torch24 wrote:
This seems to imply that you can assign MAC-based VLAN (such as one not created on the switch) then add a port-based or protocol-based one.
Doubt there is any kind of Generic Attribute Registration Protocol (GARP) or Generic VLAN Registration Protocol (GVRP) allowing to automatically create and define VLANs. Nothing the like in the data sheet, the user manual. Neither implicit, nor explicit.
Yes, some competitors offer this feature on certain smart switch series. however, in the price range beyond of 200 Euro/port - not in the 10 Euro per port switch class we're facing here.
Keep in mind the GS308T is not a very advanced Managed Switch, much more a Smart Managed switch. Have requested a moderator to move your thread to the appropriate Plus And Smart Switches Forum intended to discuss Smart Switches (T) and Plus Switches (E), including Local and Remote Management models.
Regards,
-Kurt
I don't know what either of those acronyms mean (other than looking them up :-), but I did quote from the switch manual and under MAC-based VLAN (pg.120) it also mentions This implies that you can configure a MAC address mapping to a VLAN that you did not yet create on the switch. The documentation on an HPE switch (that I do not own) says ...the port selects a VLAN for the frame in the order of MAC-based VLAN, protocol-based VLAN, and port-based VLAN... It would be helpful if the manual for the GS308T was as clear.
Thanks.
In my reading, the VLAN is created along when adding a MAC Address and a VLAN ID in an authenticated admin session - anything else would bring a massive security issue in absence of GVRP and GARP:
No idea if this UI would allow to define multiple MAC based VLANs for the same VLAN ID.
Well, I'm just yet another user here, and can be wrong. Yes, we have some deployed switches from a big competitor in the field, supporting GVRP and/or GARP. 8-)
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