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Forum Discussion
M4250-12G2XF-PoE+ Problem lost link on a trunk link
Hello, I have a problem using a M4250-12G2XF-PoE+ along with a M4250-26G4XF-PoE+. Issue : works well for some times (30 mins or 2 hours) then connection is lost on the trunk link Both swi...
Allow some notes here:
Is there no indication in the logs (on the IT view) why the link was disabled?
Most makers and vendors sold and still offer 10GbE copper modules wiy limited reach only (like max 30 m, sometimes 35 m), due to high power requirements of the earlier chipsets). The reason LaurentMa pointed to the -200000 version because it's providing longer reach.
Is there no indication in the logs (on the IT view) why the link was disabled?
Most makers and vendors sold and still offer 10GbE copper modules wiy limited reach only (like max 30 m, sometimes 35 m), due to high power requirements of the earlier chipsets). The reason LaurentMa pointed to the -200000 version because it's providing longer reach.
Hi,
thanks for the insight.
the module is effectively getting pretty hot, don't know if it is expected.
Can't say more from the IT point of view.
Thanks
- So no potential related items in the device log?
From wally brain these cli commands show some basic insightof the SFP modules:
# show fiber-ports optics all
# show fiber-ports optics-info all
#show fiber-ports optics-eeprom 1/0/1 (this is unit/slot/port
or
#show fiber-ports optics-eeprom allSorry misunderstood your first question.
NETGEAR support team certified there is a "local fault" error on port 12 (SFP) of the M4250-12G2XF.
Though it only appears on this switch, never on the M4250-26G4XF on the other side.
- Temperatures up to mit 75°C are not uncommon for 10GbE SFP+ copper modules, both generations (30m or 80m) take a lot of power, the longer the link is.
If there is a choice - so in each case except when having to link a 10GbE copper-only system - it's always better to go for DAC, active DAC, active fiber DAC, or fiber modules and a fiber pair not connection. All these need just som 0.xW, up to 1 for Multimode at 300 meters, or up to 1.5W for single mode fiber pairs regardles if it's a short, a 10 km, or even a 30 km (or much longer up to 150..180km) at a high module cost.
10Gb copper Ethernet does draw up to about 3W (or the allowed maximum), and does create a lot of heat regardless of the link length. Combined with fan-less or low-noise AV switches, it's not a difficult guess this is not an ideal solution - because the module cages are not specially covered by airflow.
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