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UncleMatt73's avatar
UncleMatt73
Follower
Mar 05, 2026

GS752TPV3 "comcast uplink port"

Howdy All,

 

We have instrumented our first "new to us" Netgear switch for our classroom (to replace like 7 smaller switched that were scattered around) and I got it up and running, but realize that PORT 7 is the "uplink to our comcast router" port and now we're putting a new classroom computer onto that port, so I need to move the uplink line.

 

I tried changing the VLAN to include Port 48 and Port 39 (both free in our schema) and moved the network line, but the switch refused to route traffic.  I rebooted the switch (not reset, restart) to see if "coming up on the new line" would work, but no.

 

If I move the line back to port 7 (still in the VLAN) it resumes functionality.

 

I have checked the port configurations in the switch web admin, and they are identical.

I have checked the VLAN membership configuration, and all three ports are "U"ntagged, with the same attributes.

 

Any ideas?  Thanks in advance

2 Replies

  • schumaku's avatar
    schumaku
    Guru - Experienced User
    UncleMatt73 wrote:

    I have checked the VLAN membership configuration, and all three ports are "U"ntagged, with the same attributes.

     

    Hello UncleMatt73 

     

    Have by accident one or multiple ports configured as [U]ntagged for multiple networks?

     

    Have set the correct PVID on the port so untagged frames are sent into the appropriate VLAN ?

     

    Any routing between the different VLANs involved?

     

    When referring to the Uplink port, is this a local definition, or talking about the port "marked" as uplink port in Netgear Insight?

  • StephenB's avatar
    StephenB
    Guru - Experienced User
    UncleMatt73 wrote:

    I tried changing the VLAN to include Port 48 and Port 39 (both free in our schema) and moved the network line, but the switch refused to route traffic.  I rebooted the switch (not reset, restart) to see if "coming up on the new line" would work, but no.

    Is the switch showing you normal ethernet status when you move the port?