NetGear VLANs in the CISCO World

[djamil aklouche]

Hello Guys,

I am having a pretty hard time figuring out the equivalent VLAN configurations of the netGear.

I am totally new to netgear's switching and its approche regarding VLANs since I worked almost my whole life with CISCO switchs.

I did my researches and understood the PVID, TAG and UNTAG concepts in Netgear. But I still hit a wall when analysing a configuration and trying to convert it into the CISCO world.

I have a project with a client that wants to replace its core netgear switch by a CISCO one. To do so, I need to be able to understand the configuration present in each port in order to translate iT on the new CISCO core.

My question is straightforward :

Analysing the configuration, I can see those kind of configs :

interface 1/0/15
vlan participation include 10,20,22,30,56-57,60,62,72,82-83,100,156
vlan tagging 13,20,22,30,56-57,60,62,72,82-83,86-87,100,156
exit

I belive this stand for :

Interface 1/0/15

Switchport mode trunk

Switchport trunk allowed vlan 13,20,22,30,56-57,60,62,72,82-83,86-87,100,156

I'm I right ? If so, why does the VLANs in participation are different from those who are tagged ? What's the matter with VLAN10 ?

Another configuration is this one :

interface 1/0/14
vlan pvid 32

exit

I also belive this stand for :

interface 1/0/14

switchport mode access

switchport access vlan 32

Then I saw this configuration :

interface 4/0/1
vlan pvid 14
vlan participation auto 1
vlan participation include 14,31-32
vlan tagging 31-32
exit

Then I saw this configuration and now I am totally confused

[Jon Marshall]

Not that familiar with Netgear but my understanding - 

vlan participation is the equivalent of the allowed vlan list on a trunk 

vlan tagging is which vlans are tagged on the trunk 

pvid is simply the vlan that is not tagged so in your last example it is a trunk port and the untagged vlan is 14

I don't know why the participation list of vlans is different from the tagged list,  I would have thought they should be the same for a trunk link (pvid aside). 

Jon

[djamil aklouche]

Thanks for this respons,

It's tricky, since there are also untagged VLANs, for example : On the 1/0/15 port I have the followings  :

Untagged : 1,3,10

Tagged : 20,22,30,56,57,60,62,72,82,83,100,156

I would concider the tagged VLANs as :

switchport trunk allowed vlan 20,22,30,56,57,60,62,72,82,83,100,156

If I had only one VLAN on the untagged I would assume that it's the default VLAN on that trunk, but there are VLANs 1,3, and 10 as you can see. What would it be in the CISCO world?

[Jon Marshall]

You can't have multiple untagged vlans on a Cisco trunk so not sure you can carry that configuration across. 

Jon

[Elliot Dierksen]

I would add that you can't actually have multiple untagged vlans on ANY switching platform! Untagged is untagged. The other key point is that untagged is per port/interface. It isn't a property of the vlan itself. A vlan could be tagged on one interface and untagged on another.

[imiske]

Only one VLAN should be UNtagged. On Netgear set PVID same as untagged VLAN.
Had same problem.
Reference:
https://mccollester.com/2022/05/25/the-difference-between-pvid-vs-untagged-vlans/
https://kb.netgear.com/31026/How-to-configure-a-VLAN-on-a-NETGEAR-managed-switch