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July 21st, 2022 19:00
VLT using 2 cables to FortiGate
Hello,
I have 2 x S5224F-ON switches and a FortiGate 100F. (The FG100 has 2 x 10Gbps SFP ports)
I know more about network concepts than the actual nuts and bolts so please bear with me. A while ago I had a network engineer look at setting up redundant links between the switches and then use LACP or the likes to create a redundant link to the FG100. It never worked and a year or so on, another engineer looked at the issue and discovered these switches don't do LACP, instead they use VLT. The same engineer then informed me it would be impossible to setup VLT between the switches and the FortiGate as it would require 4 cables and there is only 2 ports.
Can anyone point me to documentation that would support this or just tell me this is how it works?
Many thanks
DELL-Joey C
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July 29th, 2024 03:04
Hi,
If you're looking at cables, here are some compatible cables for S5224F:
DAC-SFP28-25G-1M 2JVDD 470-ACEX
DAC-SFP28-25G-2M D0R73 470-ACFB
DAC-SFP28-25G-2.5M 0DF77 470-AENF
DAC-SFP28-25G-3M VXFJY 470-ACEU
DAC-SFP28-25G-5M 9X8JP 470-ACEY
Unfortunately, I do not have any documentation on if the cables would be compatible with Fortigate.
But if you need any configuration checks and deployment, you may need to contact the support to have an engineer to confirm the setup.
DELL-Erman O
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July 22nd, 2022 00:00
Hello,
Unfortunately, I do not have information about Fortigate and network initial configuration. But while I was researching, I came across a similar issue, can you take a look at this link, I think this topic can help.
https://dell.to/3PHeBh0
Hope that helps!
TheITGuyESP
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July 22nd, 2022 01:00
Thanks for pointing that one out, it looks like that's where my current engineer got his information from. Unfortunately my scenario only has a single FG with 2 ports to work with so I can't replicate it. I don't know enough to reverse engineer this back to my situation. I feel like I've ended up with switches not fit for my purpose.
TheITGuyESP
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July 22nd, 2022 15:00
After thinking on it a while I wonder if I'm barking up the wrong tree. The VLT should be between the switches, what I really should be asking is, how do I have one leg in each switch back to a single device in some sort of LAG, whatever the acronym.
DELL-Young E
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July 24th, 2022 22:00
Here's some topology sample diagram. Hope this helps your understanding.
1 Attachment
e3cff895-ddc4-4f30-9f84-41acc5bb1542-305435852.jpg
TheITGuyESP
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July 25th, 2022 00:00
Thank you very much! That is super helpful. I have some work scheduled in the coming weeks, I'll report back as to how I get on.
Appreciate you taking the time to provide this info.
Kalush226
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July 26th, 2024 20:42
@DELL-Erman O hello i have the same problem. I want to know the type of cable that i must use. I have direct sfp28 to sfp28 25Gbe Dell. I have one Dell Switch s5224f-on and one Fortigate 100f.