topic Re: Checking Optical Receive Power on R81.10.10 in Spark Firewall (SMB)

Checking Optical Receive Power on R81.10.10

TSOL — Tue, 30 Sep 2025 01:40:24 GMT

Hello Team,

We have noticed that when using the original Check Point transceiver (SFP) with our Quantum Spark, the communication becomes unstable. However, when we use a non-original transceiver, the connection is stable.

To troubleshoot, we attempted to check the optical power using the following command, but it fails:

show sfp-diag LANX1
> LANX1 port has no SFP support

According to the documentation, it is stated: “In the R81.10.X releases, this command is available starting from the R81.10.17 version.”

Our environment details:

Hardware: Spark 1900

OS: R81.10.10

Symptom: Link comes up, but pings are intermittently lost.

Question:
Is there any alternative way (either via GUI or CLI) to check the optical power level on R81.10.10?

Thank you in advance.

Re: Checking Optical Receive Power on R81.10.10

Chris_Atkinson — Tue, 30 Sep 2025 04:41:36 GMT

No alternative method to my knowledge without upgrading to the recomended release.

Can you please confirm the type of each transceiver used and have you reported it to TAC?

Re: Checking Optical Receive Power on R81.10.10

TSOL — Tue, 30 Sep 2025 04:54:46 GMT

Thank you for the reply.

Got it, that was my understanding as well. I’ll follow up with TAC to confirm.

Appreciate your help.

Re: Checking Optical Receive Power on R81.10.10

the_rock — Sun, 05 Oct 2025 18:48:34 GMT

Hey @TSOL ,

Chris is 100% correct, this is actually not possible in R81.10.10, only in R81.10.17. I worked with TAC on an unrelated issue regarding SMB for a customer and asked them about this and they also confirmed.

Best,

Andy