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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. Ar...
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-)
I agree - I don't think the switch allows multiple MAC-based VLANs.
If I create a MAC-based VLAN, a Protocol-based VLAN and a Port-based, how would be a packet be tagged if it (in theory) qualifies for all three? I suspect it would be MAC, Protocol or Port; in that order. The switch manual is unclear, thus my request for a logic diagram.
Torch24 wrote:
... I don't think the switch allows multiple MAC-based VLANs.
Strongly doubt. Not a GS308T, but another Broadcom based MS510TXUP for example:
I now understand more about the various VLANs.
MAC-based VLANs allow a device (MacBookAir in my case) to connect from anywhere on the network that is connected to a port on the switch and be assigned a VLAN dynamically. Because MAC-based VLAN assignment is a) across all ports and b) assigned before any protocol- or port-based VLAN, the packet gets a VLAN tag and is then processed in the switch bypassing any protocol- or port-based VLAN assignment.
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