Showing results for 
Search instead for 
Did you mean: 

SF302-08P layer 3 mode

Luis Azedo
Level 1
Level 1


i'm trying to configure SF302-08P in layer 3 mode.

ports 1 to 8 have ip phones and desktops, port GE1 in connected to a router (not cisco) that links to the internet.

i created vlan 100 and assigned to ports 1 to 8 (untagged)

i created vlan 200 and assigned to port ge1 (untagged)

activated dhcp server , created pool with gw

                       |router A| ( gw



                           | GE1 (

                       | SF302-08P |



SPA504G+DESKTOP |    SPA504G+DESKTOP            

the problem that i'm facing is that SPA504G and desktops access the internet with their inter address and not

is there a way to achieve what i'm looking ? how does routing work in this case ? shouldn't there be some kind of NAT ?

thank you

3 Replies 3

Level 1
Level 1

Hello Luis,

Is there a particular reason that the switch needs to be in Layer 3 Mode?

I think your scenario would work better if you configure NAT on your router and let the router act as the DHCP server. Then, the switch could be in Layer 2 Mode.



i need to use separate vlan for voice/data and provide dhcp .

upstream router is very basic, doesn't support vlan or dhcp options for provisioning.

Please review this topic for all needed information


Please mark answered for helpful posts

-Tom Please mark answered for helpful posts
Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Switch products supported in this community
Cisco Business Product Family
  • CBS110
  • CBS220
  • CBS250
  • CBS350
Cisco Switching Product Family
  • 110
  • 200
  • 220
  • 250
  • 300
  • 350
  • 350X
  • 550X