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I have two Arista switches and I would like them to communicate in 1G through a direct link.

I know of three of options:

  1. Use copper RJ45 and SFP-to-RJ45 transceivers on both ends
  2. Use optical, with SFP to 1000BASE-SX transceivers
  3. Use optical, with SFP to 1000BASE-LX transceivers

Are there other options where there's some sort of 1G "direct attach" no requiring external transceivers?

Randomblue
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2 Answers2

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You haven't mentioned what model switches you have, but there are more than a few types of SFP connectors, the 1000BASE-T (SFP to Gb Ethernet) and SX models are for short distance connectivity (although the fiber will go much longer distances than the copper), LX, EX, ZX, EZX, and so on which are for 10km+ distances.

I am making the assumption that these switches have no RJ-45 ports, as that would make plain copper cabling another possible connection method.

The only other type of "direct attach" connectivity I can think of would be the stacking cables, but that's very probably debatable.

NickW
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  • The switches are 7124 and 7148, which only have SFP/SFP+ connectors. What do you mean by "stacking cables"? – Randomblue Mar 03 '14 at 16:46
  • Well, if the switches are compatible, you can use stacking cables to create a much larger single managed switch instead. – NickW Mar 03 '14 at 16:48
  • Just had a look at the models, doesn't look like they are actually stackable. – NickW Mar 03 '14 at 16:51
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The Arista switch that you have mentioned can support the following interface. Arista switch

Choose which type of cabling or optical transceiver depends on your cost and distance. Hope this helps !

Mark Twain
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