Forum Discussion

Guide

Dec 13, 2016

Mirror uplink on a stack

I have enabled OSPF across a connection coming in and I want to split that connection and plug it in to both switches. Is this possible? I cannot add the same IP address to a port on the other sw...

Solutions

DaneA

NETGEAR Employee Retired

Dec 14, 2016

Hi l27,

Based on the diagram, the M4300-28G switches are in a stack which means that it will function as one switch. Is the switch that will split the incoming connection also a NETGEAR switch? If yes, what is the model of it?

Let me share the article below as reference guide about planning your network setup:

How do I configure Open Shortest Path First (OSPF) on a border router using the web interface on my managed switch?

Regards,

DaneA

NETGEAR Community Team

l27

Guide

Dec 14, 2016

Thanks for the reply. It's an HP 2910al. Maybe I could create a trunk between the switches?

l27
Guide
Dec 14, 2016
To add one more point. I have ospf working. I just want to split the incoming connection from the ISP which is a layer 2 connection so it's plugged into each switch should one fail. I know I still have a single point of failure with the additional switch and the ISP's equipment but it would make me feel a little better. I did ask the ISP if they would give me 2 routers, (They really aren't a router because it's a layer 2 connection so I'm not sure what to call them, I didn't put it in the diagram but it's between the switch and the cloud.), but they said no eventhough they brought in 2 pairs of fiber for redundancy.
- l27
  Guide
  Dec 14, 2016
  One last bit of info. I also have an MPLS that I can use as a backup to this connection. Maybe I just rely on that and should one of the netgear switches fail I simply move the connection in the diagram from one switch to the other and reconfigure one of the ports.
  - Retired_Member
    Dec 15, 2016
    Hi l27,
    
    Welcome to Netgear Community!
    
    According your description, I suggest you could create a trunk between M4300 stacking switch and HP 2910al switch just as you said.
    
    One key point: Make sure the trunk mode should be same on two switches, M4300 LAG port default mode is LACP, so please make sure the LAG mode is LACP too on HP 2910al.
    
    Regards
    
    Ericz
    
    Netgear Employee