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Beginner

Uplink from SG350 to another SG350 with two untagged VLAN Accces Ports

Hello,

 

i has the following issue;

 

The first SG300 has two segments of differernt vlan acces port ranges. Now i want to uplink it to another SG350 with the same different vlan access ports and want to uplink each range with single uplink cables. Sure i can it trunk it, but i must switch it without tagging. So, now the issue; on both Switches STP is default enabled and so only one Uplink is working.

 

How can i it make to working now ?

 

thanks for any help

5 REPLIES 5
VIP Advisor

Re: Uplink from SG350 to another SG350 with two untagged VLAN Accces Ports

Hi there,

So you want to connect the switches using mode access switchports, with each switchport carrying a separate VLAN?

Normally if you did this the switch would detect the STP BPDUs and place the switchports in err-disable….that is why you use a trunk port. But if you want to pursue this design then enable BPDU filter on both ends of each switchport link.

 

Cheers,

Seb.

Beginner

Re: Uplink from SG350 to another SG350 with two untagged VLAN Accces Ports

hello,

thank you for your help. On the first Switch (SG300) i can switch the BPDU Option from Flooding to Filtering, but at the other switch (SG350) this Option is gray-out. Is this which option do you mean ?
VIP Advisor

Re: Uplink from SG350 to another SG350 with two untagged VLAN Accces Ports

Yes that is the feature. On the SG350 has spanning tree been enabled?

VIP Engager

Re: Uplink from SG350 to another SG350 with two untagged VLAN Accces Ports

Hi,

SMB switch SG350 will only work with RSPT and MST. so you have two option:

1. Make a PortChannel and combine both physical ports into one single logical port and use both ports as Load balancing/redundancy.

2. Convert RSPT to MST and use two groups like one group each VLAN.

 

Regards,
Deepak Kumar,
Resume duty after a long holiday
Beginner

Re: Uplink from SG350 to another SG350 with two untagged VLAN Accces Ports

hello,
thank you.
i must more specified the cabling between the switches.
Between the SG300 and the SG350 there is a different SG100-Switch in each untagged VLAN.
So i can't make a LAG (PortChannel) as an phisical cable-trunk between the SG300 and SG350 ;-P

Please, can you specified what i must configuriering ?

thanks for a lot!
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