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February 22nd, 2024 16:33

S4048-ON OOB Management Port - Can't establish SSH session.

We've been attempting to reach a pair of S4048-ON switches via SSH over the network. We have configured IP addresses for the OOB management ports on each switch and attached it to our network via a small "dumb" switch but have had no luck establishing a connection. We can, however, establish a SSH session when we connect a laptop directly to the "dumb" switch that the OOB management ports are attached to. 

Initially, we didn't have a management route set, so we tried that. Still no luck. 

We don't have a separate OOB management network btw. We didn't think there would be any reason we wouldn't be able manage the switches over our regular network via the OOB ports. Maybe our understanding is wrong?

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February 23rd, 2024 02:29

Hi,

 

Can you check if the OOB management configurations, that a gateway has been set, you mentioned you are unable to ping. 

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February 22nd, 2024 21:15

The_LostIT_Guy,
 
The first thing I would look into is if the ports on the S4048-ON have SSH enabled and if it is the same versions, as described on page 821-822 in the guide here
If it is then would you give a little more detail, such as what are you seeing when you try, and also what kind of switch is in between?
 
Let me know what you see and if this helps.
 

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February 22nd, 2024 21:49

@DELL-Chris H​ SSH is enabled and is the same version on both switches. 

When pinging the management IP of the switches, "Request timed out" is returned. When trying to connect via SSH (using putty), "Connection timed out" is returned. 

The switch in-between is just a 4-port dumb switch from TRENDnet. 

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February 22nd, 2024 21:57

@DELL-Chris H​ I didn't mention this in my original post because I thought it didn't matter, but the management IPs of the S4048's are on a different subnet from the computers we have been trying to access them from. We can reach other devices in that subnet/vlan just fine though.

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February 23rd, 2024 13:25

@DELL-Joey C@DELL-Chris H  This is a little embarrassing to admit, but it ended up being a blunder on our part! While my co-worker was working on the switches from the server room, I was trying to ping them from our office. There was some miscommunication between us when trying to configure the management route. I was trying to reach Switch-A while he was actually working on Switch-B. 🤦‍♂️

We just needed to sleep on it I guess!

(edited)

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