If your willing to do it you could just open it up an mount the fan(s) in reverse. On 06/09/2015 6:35 pm, "Alex Samad - Yieldbroker" < Alex.Samad@yieldbroker.com> wrote:

Hi

Sorry I meant back to front. cold air in the back hot our the front ?

A ________________________________________ From: Public [public-bounces@talk.mikrotik.com.au] on behalf of Alex Samad - Yieldbroker [Alex.Samad@yieldbroker.com] Sent: Sunday, 6 September 2015 6:31 PM To: MikroTik Australia Public List ‎[public@talk.mikrotik.com.au]‎ Subject: [MT-AU Public] fan direction in the CCR's

Hi

Is there any option to buy an front to back airflow CCR's ?

Or is there an option in the config to change the direction of the fans ?

A

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au

Hi So I have made the changed and turned on my monitoring of temp on my boxes. Seems like my unit that I convert to air flor back to front , the CPU is running hotter than my other boxes, which are drawing air front to back. So 5 x CCR1036. Avg CPU temp is 4 avg 54c and max 55or 56c the one I changed is avg 58c. max 59c From http://routerboard.com/CCR1036-8G-2SplusEM Operating temperature range -30C to +60 Looking at those numbers I think I should put the fans back the other way ... Alex -----Original Message----- From: Alex Samad - Yieldbroker Sent: Sunday, 6 September 2015 7:25 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: RE: [MT-AU Public] fan direction in the CCR's Hmm nice and simple ! -----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Steve Sugden Sent: Sunday, 6 September 2015 6:36 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: Re: [MT-AU Public] fan direction in the CCR's If your willing to do it you could just open it up an mount the fan(s) in reverse. On 06/09/2015 6:35 pm, "Alex Samad - Yieldbroker" < Alex.Samad@yieldbroker.com> wrote:

Hi

Sorry I meant back to front. cold air in the back hot our the front ?

A ________________________________________ From: Public [public-bounces@talk.mikrotik.com.au] on behalf of Alex Samad - Yieldbroker [Alex.Samad@yieldbroker.com] Sent: Sunday, 6 September 2015 6:31 PM To: MikroTik Australia Public List ‎[public@talk.mikrotik.com.au]‎ Subject: [MT-AU Public] fan direction in the CCR's

Hi

Is there any option to buy an front to back airflow CCR's ?

Or is there an option in the config to change the direction of the fans ?

A

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com. au

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com. au

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au

Hi Alex, Where in the rack are you CCR's mounted, if they are near the top of the rack, there may not be enough air flow/pressure to the CCR's that have reversed airflow due to the fan intakes now being further "inside" the rack than they were before. We have not reversed airflow on our CCR's, but we have done this on some of our older 10gig switches that did not have a B-F fan option. We experienced the same result, the switches ran hotter. After a fair bit of head scratching, and making ducting out of core flute we determined the actual problem was that the switches are much further back from the front of the rack and there was not enough air-pressure to feed cold air in to them. This was made worse by having an Oracle M5000 directly below them stealing all the cool air. We ended up making a "fan panel" that houses 3x 120mm fans and mounts to the front of the rack forcing cold air toward the equipment that is rear mounted. This works really well and we now have temperatures even lower than our normal front mounted switches. I hope this helps. Regards, Andrew On Tue, Sep 8, 2015 at 3:53 PM, Alex Samad - Yieldbroker < Alex.Samad@yieldbroker.com> wrote:

Hmm

Just checked the fan rpm...

4-5K for the 4 normal 8k for the one I changed ...

Standard 19" rack. These are facing out back into the hot aisle, which is why I thought I should have air flow from back (cold aisle) to front.

Seems like that might not be best Alex

-----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Alex Samad - Yieldbroker Sent: Tuesday, 8 September 2015 1:51 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: Re: [MT-AU Public] fan direction in the CCR's

Hi

So I have made the changed and turned on my monitoring of temp on my boxes.

Seems like my unit that I convert to air flor back to front , the CPU is running hotter than my other boxes, which are drawing air front to back. So 5 x CCR1036. Avg CPU temp is 4 avg 54c and max 55or 56c the one I changed is avg 58c. max 59c

From http://routerboard.com/CCR1036-8G-2SplusEM Operating temperature range -30C to +60

Looking at those numbers I think I should put the fans back the other way ... Alex

-----Original Message----- From: Alex Samad - Yieldbroker Sent: Sunday, 6 September 2015 7:25 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: RE: [MT-AU Public] fan direction in the CCR's

Hmm nice and simple !

-----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Steve Sugden Sent: Sunday, 6 September 2015 6:36 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: Re: [MT-AU Public] fan direction in the CCR's

If your willing to do it you could just open it up an mount the fan(s) in reverse. On 06/09/2015 6:35 pm, "Alex Samad - Yieldbroker" < Alex.Samad@yieldbroker.com> wrote:

...

Hi

Sorry I meant back to front. cold air in the back hot our the front ?

A ________________________________________ From: Public [public-bounces@talk.mikrotik.com.au] on behalf of Alex Samad - Yieldbroker [Alex.Samad@yieldbroker.com] Sent: Sunday, 6 September 2015 6:31 PM To: MikroTik Australia Public List ‎[public@talk.mikrotik.com.au]‎ Subject: [MT-AU Public] fan direction in the CCR's

Hi

Is there any option to buy an front to back airflow CCR's ?

Or is there an option in the config to change the direction of the fans ?

A

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com. au

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com. au

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au

Hi Alex, Before fan panel 35-37degrees. After fan panel 27-30degrees Screenshot attached. On Tue, Sep 8, 2015 at 6:05 PM, Alex Samad - Yieldbroker < Alex.Samad@yieldbroker.com> wrote:

Hi

Thanks, I am coming to the same conclusion, they are not long enough to get to the cold air.

Unfortunately I am not in a position to a major re org of the rack for now. It seems they run a lot cooler sucking in the hot air.

So it looks like another visit for me :)

Not in a position to make up a front panel ...

Can you advise what is your current running temp ??

A

-----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Andrew Thrift Sent: Tuesday, 8 September 2015 3:14 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: Re: [MT-AU Public] fan direction in the CCR's

Hi Alex,

Where in the rack are you CCR's mounted, if they are near the top of the rack, there may not be enough air flow/pressure to the CCR's that have reversed airflow due to the fan intakes now being further "inside" the rack than they were before.

We have not reversed airflow on our CCR's, but we have done this on some of our older 10gig switches that did not have a B-F fan option.

We experienced the same result, the switches ran hotter. After a fair bit of head scratching, and making ducting out of core flute we determined the actual problem was that the switches are much further back from the front of the rack and there was not enough air-pressure to feed cold air in to them. This was made worse by having an Oracle M5000 directly below them stealing all the cool air. We ended up making a "fan panel" that houses 3x 120mm fans and mounts to the front of the rack forcing cold air toward the equipment that is rear mounted. This works really well and we now have temperatures even lower than our normal front mounted switches.

I hope this helps.

Regards,

Andrew

On Tue, Sep 8, 2015 at 3:53 PM, Alex Samad - Yieldbroker < Alex.Samad@yieldbroker.com> wrote:

...

Hmm

Just checked the fan rpm...

4-5K for the 4 normal 8k for the one I changed ...

Standard 19" rack. These are facing out back into the hot aisle, which is why I thought I should have air flow from back (cold aisle) to front.

Seems like that might not be best Alex

-----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Alex Samad - Yieldbroker Sent: Tuesday, 8 September 2015 1:51 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: Re: [MT-AU Public] fan direction in the CCR's

Hi

So I have made the changed and turned on my monitoring of temp on my boxes.

Seems like my unit that I convert to air flor back to front , the CPU is running hotter than my other boxes, which are drawing air front to back. So 5 x CCR1036. Avg CPU temp is 4 avg 54c and max 55or 56c the one I changed is avg 58c. max 59c

From http://routerboard.com/CCR1036-8G-2SplusEM Operating temperature range -30C to +60

Looking at those numbers I think I should put the fans back the other way ... Alex

-----Original Message----- From: Alex Samad - Yieldbroker Sent: Sunday, 6 September 2015 7:25 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: RE: [MT-AU Public] fan direction in the CCR's

Hmm nice and simple !

-----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Steve Sugden Sent: Sunday, 6 September 2015 6:36 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: Re: [MT-AU Public] fan direction in the CCR's

If your willing to do it you could just open it up an mount the fan(s) in reverse. On 06/09/2015 6:35 pm, "Alex Samad - Yieldbroker" < Alex.Samad@yieldbroker.com> wrote:

...

Hi

Sorry I meant back to front. cold air in the back hot our the front ?

A ________________________________________ From: Public [public-bounces@talk.mikrotik.com.au] on behalf of Alex Samad - Yieldbroker [Alex.Samad@yieldbroker.com] Sent: Sunday, 6 September 2015 6:31 PM To: MikroTik Australia Public List ‎[public@talk.mikrotik.com.au]‎ Subject: [MT-AU Public] fan direction in the CCR's

Hi

Is there any option to buy an front to back airflow CCR's ?

Or is there an option in the config to change the direction of the fans ?

A

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com. au

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com. au

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com. au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com. au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com. au

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au

Hi Alex, This is an Extreme Networks switch, not a CCR. I would expect similar changes with any other device. On Wed, Sep 9, 2015 at 9:00 AM, Alex Samad - Yieldbroker < Alex.Samad@yieldbroker.com> wrote:

Hi

Oh, that’s more than 10c cooler than mine.

No attachment

A

-----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Andrew Thrift Sent: Tuesday, 8 September 2015 8:23 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: Re: [MT-AU Public] fan direction in the CCR's

Hi Alex,

Before fan panel 35-37degrees. After fan panel 27-30degrees

Screenshot attached.

On Tue, Sep 8, 2015 at 6:05 PM, Alex Samad - Yieldbroker < Alex.Samad@yieldbroker.com> wrote:

...

Hi

Thanks, I am coming to the same conclusion, they are not long enough to get to the cold air.

Unfortunately I am not in a position to a major re org of the rack for now. It seems they run a lot cooler sucking in the hot air.

So it looks like another visit for me :)

Not in a position to make up a front panel ...

Can you advise what is your current running temp ??

A

-----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Andrew Thrift Sent: Tuesday, 8 September 2015 3:14 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: Re: [MT-AU Public] fan direction in the CCR's

Hi Alex,

Where in the rack are you CCR's mounted, if they are near the top of the rack, there may not be enough air flow/pressure to the CCR's that have reversed airflow due to the fan intakes now being further "inside" the rack than they were before.

We have not reversed airflow on our CCR's, but we have done this on some of our older 10gig switches that did not have a B-F fan option.

We experienced the same result, the switches ran hotter. After a fair bit of head scratching, and making ducting out of core flute we determined the actual problem was that the switches are much further back from the front of the rack and there was not enough air-pressure to feed cold air in to them. This was made worse by having an Oracle M5000 directly below them stealing all the cool air. We ended up making a "fan panel" that houses 3x 120mm fans and mounts to the front of the rack forcing cold air toward the equipment that is rear mounted. This works really well and we now have temperatures even lower than our normal front mounted switches.

I hope this helps.

Regards,

Andrew

On Tue, Sep 8, 2015 at 3:53 PM, Alex Samad - Yieldbroker < Alex.Samad@yieldbroker.com> wrote:

...

Hmm

Just checked the fan rpm...

4-5K for the 4 normal 8k for the one I changed ...

Standard 19" rack. These are facing out back into the hot aisle, which is why I thought I should have air flow from back (cold aisle) to front.

Seems like that might not be best Alex

-----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Alex Samad - Yieldbroker Sent: Tuesday, 8 September 2015 1:51 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: Re: [MT-AU Public] fan direction in the CCR's

Hi

So I have made the changed and turned on my monitoring of temp on my boxes.

Seems like my unit that I convert to air flor back to front , the CPU is running hotter than my other boxes, which are drawing air front to back. So 5 x CCR1036. Avg CPU temp is 4 avg 54c and max 55or 56c the one I changed is avg 58c. max 59c

From http://routerboard.com/CCR1036-8G-2SplusEM Operating temperature range -30C to +60

Looking at those numbers I think I should put the fans back the other way ... Alex

-----Original Message----- From: Alex Samad - Yieldbroker Sent: Sunday, 6 September 2015 7:25 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: RE: [MT-AU Public] fan direction in the CCR's

Hmm nice and simple !

-----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Steve Sugden Sent: Sunday, 6 September 2015 6:36 PM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: Re: [MT-AU Public] fan direction in the CCR's

If your willing to do it you could just open it up an mount the fan(s) in reverse. On 06/09/2015 6:35 pm, "Alex Samad - Yieldbroker" < Alex.Samad@yieldbroker.com> wrote:

...

Hi

Sorry I meant back to front. cold air in the back hot our the front ?

A ________________________________________ From: Public [public-bounces@talk.mikrotik.com.au] on behalf of Alex Samad - Yieldbroker [Alex.Samad@yieldbroker.com] Sent: Sunday, 6 September 2015 6:31 PM To: MikroTik Australia Public List ‎[public@talk.mikrotik.com.au]‎ Subject: [MT-AU Public] fan direction in the CCR's

Hi

Is there any option to buy an front to back airflow CCR's ?

Or is there an option in the config to change the direction of the fans ?

A

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au

http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.

...

au

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au

http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.

...

au

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com. au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com. au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com. au

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au

_______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au