Recommend: 10GbE, L2+/L3 switch. VLAN ACLs

[tommybackeast]

Not sure on the power draw and I know it will be on the higher side...

Cisco 4948E , has 4 x SFP+ ports, still in support and can be had used on eBay less than $300

Can you speak to the Cisco 4948E noise (after bootup) and its power draw, thanks

 

[Evan]

Can you speak to the Cisco 4948E noise (after bootup) and its power draw, thanks

Power is terrible ! ~190w idle.

Sound once they boot is actually surprising not that bad, sitting under a table or whatever it’s not usually worse than most PC’s

(When I say terrible, have to put that in context if also what it’s being used for. A full rack of servers then seems not so bad)

 

[tommybackeast]

thank you for the power info on the Cisco 4948E , 200watts is indeed very high

 

[da9293]

Regarding the noise on these things... I'm half tempted to take the switch apart, move the innards to a 2U chassis (hack it up), and do some fan and PSU swapping to make it quieter.

The PSUs on these things output 12v only, all other voltage regulation is onboard. I'll have to spend some time to figure out the "sense" pins and the fan wiring but that can't be too difficult.

Another reason I'm considering this is because I have a number of other systems in my rack that are very low power. They don't draw more than 40-60w each (at full tilt), so doing a "top of the rack" 12v power supply and then distributing it to the switch and these systems, should be more efficient, in theory (vs each PSU doing it's own conversion).

I'm in the middle of building a few servers that I need, but once that's complete, I have a strong suspicion I'm gonna tackle this...

Did you ever figure this out? I'm currently trying to do the same thing on a LB6M switch (eliminate the P/S and run 12v from a 80+ plat p/s from my supermicro server) but I don't have the tools to figure out the sense pins on the PSU/board so when it detects 12v it powers up briefly and then de-powers the chipset since it can't detect a PSU.

 

[fohdeesha]

Did you ever figure this out? I'm currently trying to do the same thing on a LB6M switch (eliminate the P/S and run 12v from a 80+ plat p/s from my supermicro server) but I don't have the tools to figure out the sense pins on the PSU/board so when it detects 12v it powers up briefly and then de-powers the chipset since it can't detect a PSU.

Sadly it's a little more complicated than "sense" pins, the switch needs to see a full I2C bus with sensors on it (fan, temp etc) and an EEPROM with data similar to the below (it needs to see a part number etc that it recognizes):

OS>i2c read 32 0 256
0000: 56 31 31 34 33 37 2c 20-20 20 42 4c 44 32 4d 33 V11437,   BLD2M3
0010: 37 4b 42 5a 5a 20 20 20-20 20 20 2c 32 33 2d 30 7KBZZ      ,23-0
0020: 30 30 30 31 34 32 2d 30-32 2c 20 42 2c 44 45 4c 000142-02, B,DEL
0030: 54 41 2c 45 43 44 31 34-30 32 30 30 32 30 20 20 TA,ECD14020020
0040: 20 20 20 2c 30 34 2c 42-4c 44 32 4d 33 37 4b 42    ,04,BLD2M37KB
0050: 5a 5a 20 20 20 20 20 30-35 30 36 41 45 04 b0 08 ZZ     0506AE...