Unfortunately, blocking incoming traffic at the switch is not sufficient. The preferred solution is to be able to visually inspect the fiber path and know that the receive path (from the device to the switch) is not connected. That means the transceiver at the switch port will not see link traffic from the device at all.
I've tried looping a spare transceiver TX into the port of interest to "fake out" the unidirectional port's receiver and give it a signal. The port link light comes on in that case, but the switch doesn't declare the port link status as up.
Evidently, we've been able to do this before, but probably not with this switch hardware. It may have even been another vendor. I'll have to see what they did.
DELL-Josh Cr
Moderator
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9.5K Posts
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February 23rd, 2021 15:00
Hi yaff,
I am not aware of a way to force it into a unidirectional mode. Is there a reason why you can’t use an ACL to block the traffic you don’t want?
yaff
2 Posts
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February 24th, 2021 08:00
Unfortunately, blocking incoming traffic at the switch is not sufficient. The preferred solution is to be able to visually inspect the fiber path and know that the receive path (from the device to the switch) is not connected. That means the transceiver at the switch port will not see link traffic from the device at all.
I've tried looping a spare transceiver TX into the port of interest to "fake out" the unidirectional port's receiver and give it a signal. The port link light comes on in that case, but the switch doesn't declare the port link status as up.
Evidently, we've been able to do this before, but probably not with this switch hardware. It may have even been another vendor. I'll have to see what they did.
DELL-Josh Cr
Moderator
•
9.5K Posts
0
February 24th, 2021 09:00
Let us know if you have any additional questions.