[j-nsp] MX240 MX480 and MX960 Power Consumption

[Colton Conor]

We are evaluating the three Juniper platforms, and trying to understand the
power consumption differences between the 3. Space is not really an issue,
but overall power consumption is.

So if all three have the following cards in the, how much difference will
there be in power consumption between the three chassis? I assume the only
differences will the the fan trays, and that the MX960 supports a 3rd SCB
that will more than likely be populated?

Does Juniper have an excel worksheet?
_______________________________________________
juniper-nsp mailing list juniper-***@puck.nether.net
https://puck.nether.net/mailman/listinfo/juniper-nsp

[Kevin Day]

They have a guide to calculating power requirements for these two routers:

http://www.juniper.net/techpubs/en_US/release-independent/junos/topics/reference/specifications/calculating-power-requirements-mx480.html

http://www.juniper.net/techpubs/en_US/release-independent/junos/topics/reference/specifications/calculating-power-requirements-mx960.html


Roughly:


An otherwise empty MX480 is:

Base system: 40W
Fans: 160W
Two SCBs with two REs: 550W
Total: 750W

An otherwise empty MX960 is:

Base system: 50W
Fans: 640W
Two SCBs with two REs: 550W
Third SCB with no RE: 185W
Total: 1425W

If you fully load both systems with MPCs, the power overhead per slot is lower on the MX960. If you’re never going to have more than 6 MPCs, the MX480 is going to be more power efficient.

Post by Colton Conor
We are evaluating the three Juniper platforms, and trying to understand the
power consumption differences between the 3. Space is not really an issue,
but overall power consumption is.
So if all three have the following cards in the, how much difference will
there be in power consumption between the three chassis? I assume the only
differences will the the fan trays, and that the MX960 supports a 3rd SCB
that will more than likely be populated?
Does Juniper have an excel worksheet?
_______________________________________________
https://puck.nether.net/mailman/listinfo/juniper-nsp

_______________________________________________
juniper-nsp mailing list juniper-***@puck.nether.net
https://puck.net

[Jerry Jones]

Components in the MX240/480 are all identical. The 480 just has physically larger chassis and 2 more power supplies.

If these are in a controlled environment and do not require NEBS, ie temp will NOT exceed 40c, then use a recent version of code and use the new power knobs to get the most power savings. Using cards like the NG MPC can really save power


On Aug 21, 2015, at 8:28 AM, Colton Conor <***@gmail.com> wrote:

We are evaluating the three Juniper platforms, and trying to understand the
power consumption differences between the 3. Space is not really an issue,
but overall power consumption is.

So if all three have the following cards in the, how much difference will
there be in power consumption between the three chassis? I assume the only
differences will the the fan trays, and that the MX960 supports a 3rd SCB
that will more than likely be populated?

Does Juniper have an excel worksheet?
_______________________________________________
juniper-nsp mailing list juniper-***@puck.nether.net
https://puck.nether.net/mailman/listinfo/juniper-nsp

_______________________________________________
juniper-nsp mailing list juniper-***@puck.nether.net
https://puck.nether.net/mailman/listinfo/juniper-nsp

[Michael Loftis]

The fans are variable speed too. So if your env isn't pushing (cards
aren't heating up) the actual load from the fans will be a lot lower
on the MX960.

An idle unpopulated MX960 (3xSCB, 2xRE, no line cards) uses about
900W. I'd still budget it at the 1425/1500W number though for a base
chassis.

Post by Jerry Jones
Components in the MX240/480 are all identical. The 480 just has physically larger chassis and 2 more power supplies.
If these are in a controlled environment and do not require NEBS, ie temp will NOT exceed 40c, then use a recent version of code and use the new power knobs to get the most power savings. Using cards like the NG MPC can really save power
We are evaluating the three Juniper platforms, and trying to understand the
power consumption differences between the 3. Space is not really an issue,
but overall power consumption is.
So if all three have the following cards in the, how much difference will
there be in power consumption between the three chassis? I assume the only
differences will the the fan trays, and that the MX960 supports a 3rd SCB
that will more than likely be populated?
Does Juniper have an excel worksheet?
_______________________________________________
https://puck.nether.net/mailman/listinfo/juniper-nsp
_______________________________________________
https://puck.nether.net/mailman/listinfo/juniper-nsp