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 switch. I guess I could configure a second IP address and enable routing on it. Any suggestions? Thanks,John

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

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

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.

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.

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

Mirror uplink on a stack | NETGEAR Communities

13 Replies

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 23, 2016
Sorry I haven't had allot of time to look at this. From the Netgear perspective how would I do this because I cannot figure out how to assign the same ip address to both ports.

I probably won't have time to look at this for a week or so. Thanks for helping me with this.
- Retired_Member
  Dec 26, 2016
  Hi l27,
  
  As your reqirement, you could configure as below:
  
  Step1: add two ports to one LAG port; refer to the link (Page258 Link Aggregation Groups).
  
  Step2: create a VLAN, add the LAG port to VLAN; refer to the link (Page169-175 Configure VLANs).
  
  Step3: enable L3 VLAN routing port and set IP address; refer to the link (Page315 Configure VLAN Routing).
  
  Regards
  
  Ericz
  
  Netgear Employee
  - l27
    Guide
    Dec 28, 2016
    That makes perfect sense. I will give that a shot. Because of the nature of these changes I will not be able to do this without scheduling maintenance downtime. So please be patient if I don't reply within the next week or 2.
    
    Thanks,
    John

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