174 reputation
7
bio website
location
age
visits member for 2 years, 11 months
seen Aug 9 '13 at 17:25

Aug
8
awarded  Popular Question
May
3
accepted Cheapest Way To Stack 48 Port Switch With My Dell 6248?
May
3
comment Cheapest Way To Stack 48 Port Switch With My Dell 6248?
Thanks, this advice got me the closest to finding a cheaper way to add ports. Dell semi-managed switches seemed like a decent option, but they don't appear to support any uplink options that won't mean sacrificing performance. Briefly looked into unmanaged non-dell switches that support SFP+, but then it seemed like I was getting higher $ amounts and risking compatibility headaches.
May
3
comment Cheapest Way To Stack 48 Port Switch With My Dell 6248?
I did mainly just need more ports, but performance is a key concern. If I'd found a cheap 48 port switch with an uplink that wouldn't have been a bottleneck, and could have been configured in the way Falcon talks about, I would have jumped on it. Ended up going with a smaller managed dell switch. Foolish I guess -- sacrificed 24 ports and $750, but sysadmin is not my primary role and at this point I decided to just go with a known quantity :-/
May
3
comment Cheapest Way To Stack 48 Port Switch With My Dell 6248?
The cheaper config I ended up considering was a with a semi-managed PowerConnect 2848 (with PowerConnect 2848 as a leaf switch in the way Falcon Momot suggested). PowerConnect 2848 would have been 1/4 price, but it looked like only uplink option was 4 1GB SFP modules, which seemed like a serious bottleneck. If I knew more about what I was doing I suspect I might have been able to figure something out, but to stay within budget and guarantee everything worked without hassles, I went down to a 6224P with 48GB uplink.
May
3
awarded  Commentator
May
3
comment Cheapest Way To Stack 48 Port Switch With My Dell 6248?
Yeah. I guess it was wishful thinking on my part... I was hoping I could "bolt on" an unmanaged switch and have the managed switch by the brains for both. This doesn't make sense even after thinking about it for a half a second... all packets to unmanaged switch would have to be passed over uplink to managed switch for it to consider and deal with somehow. If I knew more about the features we're using (VLANS and QoS, I suspect it would make even less sense.)
May
2
asked Cheapest Way To Stack 48 Port Switch With My Dell 6248?
Apr
22
awarded  Supporter
Mar
28
awarded  Teacher
Feb
23
answered Print windows print jobs in order of submission
Sep
28
accepted Cl 6 vs Cl 9 In a Poweredge r710
Sep
28
comment Cl 6 vs Cl 9 In a Poweredge r710
Thanks! With memory I'm never sure what the relative importance of the factors is (i.e i can can compare specs and say "hm 6 is lower than 9, I guess that's better" but I don't have a real sense of how significant that better was is. In this case it sounds like more memory far outweighs performance hit from higher latency. Thanks again!
Sep
26
comment Cl 6 vs Cl 9 In a Poweredge r710
I'm talking about timings not speed. I've ready the manual, but my question isn't answered. What I want to know is if a difference in timings like that one described is enough to cause a real world noticeable difference?
Sep
23
asked Cl 6 vs Cl 9 In a Poweredge r710
Sep
16
awarded  Editor
Sep
8
accepted PDU With Configurable AMP Limit
Sep
7
comment PDU With Configurable AMP Limit
Yep, I've done this. I was hoping to use the PDU as a second line of defense (second to the UPS' overload protection). For example, if I set the PDU to trip at a little below where the UPS trips, the PDU would trip first. If I set it to trip at the same amperage as the UPS, it would trip if the UPS overload malfunction failed. It sounds like this just isn't done though. I'll get a 16 amp PDU and just be very careful with what I plug into it.
Sep
7
comment PDU With Configurable AMP Limit
Yep, the PDU is only getting power from the UPS, but that's exactly my concern. Right now I can easily overload my UPS by plugging too many devices into the PDU. If the PDU has a breaker that flips below the max rating of the UPS then the PDU would trip before I overload my UPS. Essentially I'm thinking of the PDU as a secondary mechanism to prevent overloading UPS (secondary to whatever internal mechanisms UPS has). I have a feeling I'm missing something here...
Sep
7
comment PDU With Configurable AMP Limit
I suspect I must be (thinking about things the wrong way around) because most people I ask about this have a similar response. Here's my thinking though: The UPS has a maximum deliver of 8 Amps. This means if I load it with devices pulling more than 8 Amps, I'm relying on the UPS to shut itself off (or whatever it does). If I have an 8 Amp PDU connected to the 8 Amp UPS I have two lines of defense: 8 Amp PDU will flip first. If that fails, UPS will shut itself down.