Sometimes the SFP+ port fails to initialize on reboot for XGS1250-12

PeterUK · August 13

XGS1250-12
V2.00(ABWE.1)C0

So I use a 10Gtek SFP+ RJ-45 Copper Transceiver
https://www.amazon.co.uk/dp/B0BG55X2P9?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2&th=1

When first tested this it failed to work then I changed Flow Control to enable and it works but on some reboots the SFP+ port fails to initialize and now it works with Flow Control to disabled but again some reboots the SFP+ port fails to initialize meaning you have to reboot again and changing port status to disable then enable does not help but when a successful reboot is done the SFP+ is fine and stable.

I get SFP+ RJ-45 Copper Transceiver are some what not recommanded and at some some will be changed for a SFP+ cable but still think this is a problem that needs looking into.

I'm not sure but maybe I need to change the Speed/Type from auto should a reboot on auto may cause this?

Thanks

Zyxel_Melen · August 18

Hi @PeterUK

This is more like a negotiation issue between the 10Gtek SFP+ RJ-45 and our switch. Changing the Speed/Type from auto to fix 10G might not help to fix this issue, but it is worth trying.

PeterUK · August 18

So changing Speed/Type tied all settings does not help so is their anything you can do to make initialize of SFP+ more stable on reboot?

The problem seems to happen in 1 in 20 reboots and if I remove Transceiver and plug it back in it then starts working

So could the problem be something like this

reboot

initialize SFP+

Transceiver negotiates RJ-45

Transceiver negotiates SFP+

but sometimes the initialize SFP+ times out due to the Transceiver has not had enough time?

what do your think about this?

Sometimes the SFP+ port fails to initialize on reboot for XGS1250-12

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