My company's experience is that the power specs are grossly
overrated. For a 12008 with dual dc supplies, we us a 25 amp circuit with
a 20 amp breaker for each power supply. Regarding dc powered 7206s, we
have done 6 on a pair of 20 amp circuits, and 8 on 30.
Brian
On Tue, 10 Oct 2000 [EMAIL PROTECTED] wrote:
> Could anyone out there help me with the following issues? I am trying to
> find out the power rfequirements for our systems.
>
> 1 - How much (48 Volts) DC current is needed for each of fully loaded
> GSR12016 router, 6509 Switch and 7200 router? (6509 and 7200 with redundent
> power supply modules) (On cisco site they say 60 A max. for GSR but on
> another site it lists 50 A max. for each power entry module. Now do all
> power modules cosume the rated power all the time or some of them use while
> others do not?)
>
> 2 - Can we give the power to active and redundent power modules from same
> DC power source?
>
> 3 - Do active and redundent power modules use the specified power
> simultaneously? i.e. Does a fully loaded GSR12016 dissipate 200A power (50
> A per power entry module)? or it uses 100 A power at any time. (active
> power modules consume power while redundent modules dont consume).
>
> In our environment we have one 480 A 48 V DC power source (4 x 120 A
> modules). That means that if one of the source DC supply modules fail we
> still have 360 A of power available. Do you think we are safe in connecting
> 3 x 7200 routers, 1 x 6509 switch and 1 x GSR12016 router to this single DC
> current source? All of the 7200 and 6509 have redundent power modules and
> we plan to connect all modules to this same source. Please suugest us of
> the best practice for the power connections if you think what we plan is
> not correct. Is it a good practice to rate the DC lines at 50 A maximum for
> each DC power entry module for GSR12016 even if the GSR is not fully
> loaded?
>
> thanks,
> sohail
>
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