Ubiquiti / Dell switch compatibility issue:
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@coliver said:
Going to sound really silly... are you sure the TX and RX sides are flipped? That is generally what happens when you get no connectivity with fiber.
Like the fiber equivalent of a crossover cable?
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@scottalanmiller said:
@coliver said:
Going to sound really silly... are you sure the TX and RX sides are flipped? That is generally what happens when you get no connectivity with fiber.
Like the fiber equivalent of a crossover cable?
Kind of. I always remember that TX needs to match with an RX.
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@coliver I know what you're talking about. Some fiber connections have individual terminals for each line. These are composite cables; no option to flip anything.
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So no flipping options?
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@art_of_shred Are you using the same SFP+ adapters?
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@brianlittlejohn said:
@art_of_shred Are you using the same SFP+ adapters?
That's a good question. Are you using SFP+ adapters that have the Dell firmware (I think?) on them. I know Cisco requires a special chip (again I think) on SFP adapters to work with their switches.
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If they are third party SFPs you might need to run commands to enable them.
Also are they are you sure they are multimode and not single mode? and what distance are the meant for? You can burn them up by using them on shorter cables than they are meant to be used with.
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I think @coliver nailed it at the start. Running switch-to-switch seems to require a crossover... but I'm not having any luck finding such a thing. I guess maybe you need to buy the separate transceivers and individual fiber cables to be able to cross them? The composite cables don't appear to come in a crossed configuration.
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@art_of_shred said:
I think @coliver nailed it at the start. Running switch-to-switch seems to require a crossover... but I'm not having any luck finding such a thing. I guess maybe you need to buy the separate transceivers and individual fiber cables to be able to cross them? The composite cables don't appear to come in a crossed configuration.
Can you take a picture of the cable? I've never seen one that doesn't have the ability to come apart.
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@coliver said:
@art_of_shred said:
I think @coliver nailed it at the start. Running switch-to-switch seems to require a crossover... but I'm not having any luck finding such a thing. I guess maybe you need to buy the separate transceivers and individual fiber cables to be able to cross them? The composite cables don't appear to come in a crossed configuration.
Can you take a picture of the cable? I've never seen one that doesn't have the ability to come apart.
Most of them come with clips on them. They usually can be removed but I've never ran into one backwards from the factory.
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Here's what we have...
(http://www.newegg.com/Product/Product.aspx?Item=N82E16833997115) -
@art_of_shred said:
Here's what we have...
(http://www.newegg.com/Product/Product.aspx?Item=N82E16833997115)Oh, that's not fiber.. that's copper Twinax. Twinax isn't something you generally do between differing models of switches. Because you need compatible SFPs on each end.
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@Jason said:
@art_of_shred said:
Here's what we have...
(http://www.newegg.com/Product/Product.aspx?Item=N82E16833997115)Oh, that's not fiber.. that's copper Twinax. Twinax isn't something you generally do between differing models of switches. Because you need compatible SFPs on each end.
So what's the best way to make a 10G/10G connection between the 2 switches? Should I get fiber and cross it over?
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These are the only supported options on the Unifi.. for 10GB.
10GBase-SR
Fiberstore SFP-10G85-3M MMF
DAC/TwinaxAddon SFP-10G-PDAC1M-AO
Juniper ex-sfp-10ge-dac-1m - (Amphenol 584990001 Rev A)
This is a 10g DAC that appears to link up at 1g when both ends are plugged into the two SFP slots of the ES-24-250W
I haven't tested sending traffic over this cable, as I only have one ES-24-250W, and Juniper equipment wants to link up at 10g when using this DAC
MikroTik S+DA0001
Molex 74742-0001 -
10GBase-SR is what I would recommend. Get fiber between the switches that seems to be one of the best ways. How close are the switches can you do 10G over twisted pair?
I've never heard of Twinax, which isn't unusual just interesting.
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I'm using twinax to connect my servers to my backup storage, but the sfp+ adapters are connecting to the exact same Intel cards in both cases.
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@coliver said:
How close are the switches ?
can you do 10G over twisted pair?- They're pretty much touching each other
- Yes you can, but these Dell's have no RJ-45 ports
Fiber seems to make the most sense for this connection.
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@art_of_shred said:
@coliver said:
How close are the switches ?
can you do 10G over twisted pair?- They're pretty much touching each other
- Yes you can, but these Dell's have no RJ-45 ports
Fiber seems to make the most sense for this connection.
Yep, if you are going to invest in the modules anyway fiber is the way to go.
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Gone are the days when you could go into CompUSA and pick up a part like this, unless you guys have a few cards around the office or have a few connections to get equipment to set this up...
Seems like a few more days before this'll be up.
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@DustinB3403 said:
Gone are the days when you could go into CompUSA and pick up a part like this, unless you guys have a few cards around the office or have a few connections to get equipment to set this up...
Seems like a few more days before this'll be up.
Especially since it is a holiday week.
