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Configure redundant SFP links
Posted on 2014-02-09
We recently purchase D-Link DGS 1210-48 switches. Would like to configure them so that the SFP fiber links work in a redundant fashion, if one goes down the system will switch over. I have looked through the manual, but could not find what I was looking for. Can someone tell the command(s) that would enable this?
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6 Comments
Active 2 days ago
I can't help you with the commands but why not setup them up in a ring topology and just have the spanning tree protocol handle it?
I am rather new to configuring switches, can you point to reading that explains what you are speaking of? Thank you for your quick response.
Active 2 days ago
http://en.wikipedia.org/wiki/Network_topology
A ring tolopogy is that you connect the 1st switch with the 2nd and the 2nd with 3rd and the 3rd with the 1st switch. Thus creating a ring.
http://en.wikipedia.org/wiki/Spanning_Tree_Protocol
Basically the STP is a database of MAC addresses hosted on the switches. And, very simply, it tells network packets where to go. So that you don't get to much broadcast traffic. Most GUI based switches have it enabled by default. If you only have 1 VLAN I suggest using Rapid-Spanning Tree.
A ring tolopogy is that you connect the 1st switch with the 2nd and the 2nd with 3rd and the 3rd with the 1st switch. Thus creating a ring.
http://en.wikipedia.org/wiki/Spanning_Tree_Protocol
Basically the STP is a database of MAC addresses hosted on the switches. And, very simply, it tells network packets where to go. So that you don't get to much broadcast traffic. Most GUI based switches have it enabled by default. If you only have 1 VLAN I suggest using Rapid-Spanning Tree.
There are two options, depending on the topology.
If the other end of the fiber connects to the same switch, then instead of spanning tree you should consider "link aggregation", since spanning tree will shut down one of the links, while ling aggregation will use both links.
So, look for ling aggregation; preferably with LACP protocol active on the ports.
In Cisco language link aggregation is called "port channel", and perhaps Dlink uses those words too.
If the other end of the fiber connects to the same switch, then instead of spanning tree you should consider "link aggregation", since spanning tree will shut down one of the links, while ling aggregation will use both links.
So, look for ling aggregation; preferably with LACP protocol active on the ports.
In Cisco language link aggregation is called "port channel", and perhaps Dlink uses those words too.
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