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Problem: a module like J4858D does not work in a Aruba CX 8325 switch, before the module was working with an HPE 5406 switch, but it does not work with an Aruab 8325 CX Switch
for example:
switch = JL635A Aruba 8325-48Y8C 48p 25G 8p 100G Switch
sfp module = J4858D (1G-SX)
>> in documentation, we find:
https://www.arubanetworks.com/assets/ds/DS_8325Series.pdf
1 Consult the ArubaOS-Switch and AOS-CX Transceiver Guide in the Aruba Support Portal for the minimum required software releases to support these transceivers. Guide also provides certain limitations for specific transceivers for use on switch models
>>> from the "Transceiver Guide" we find the information:
1G optics at the opposite end of the link
must NOT enable auto-negotiation and operate in full duplex mode.!!!
>> so this is the solution:
>>>> set the neighbor interface to full duplex
for example, if the neighbor switch is a hpe 2540 (aruba os / procurve), the uplink interface should look like:
interface 52
speed-duplex 1000-full
####################################################################
# >> very important!!!
# 1G optics at the opposite end of the link
# must NOT enable auto-negotiation and operate in full duplex mode.!!!
####################################################################
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