Re: [nsp] 7500 cybus utilization question

From: Richard Gallagher (rgallagh@cisco.com)
Date: Mon May 20 2002 - 02:32:08 EDT


Dmitri,

Try seeing if your figures match with the output of this command:

- show controllers cbus utilization

Rich

Dmitri Kalintsev wrote:
>
> Hi good people,
>
> We have a rather intersting situation. Here's an "sh ver" snippet from first
> half of 7576 box:
>
> cisco RSP4 (R5000) processor with 262144K/2072K bytes of memory.
> R5000 CPU at 200Mhz, Implementation 35, Rev 2.1, 512KB L2 Cache
> Last reset from power-on
> G.703/E1 software, Version 1.0.
> G.703/JT2 software, Version 1.0.
> X.25 software, Version 3.0.0.
> Chassis Interface.
> 1 VIP2 controller (4 Ethernet)(4 Serial).
> 1 VIP2 R5K controller (1 FastEthernet)(1 Fddi).
> 4 VIP4-80 RM7000 controllers (1 FastEthernet)(1 GigabitEthernet)(1 ATM)(4
> POS).
> 4 Ethernet/IEEE 802.3 interface(s)
> 2 FastEthernet/IEEE 802.3 interface(s)
> 1 GigabitEthernet/IEEE 802.3 interface(s)
> 4 Serial network interface(s)
> 1 FDDI network interface(s)
> 1 ATM network interface(s)
> 4 Packet over SONET network interface(s)
>
> Busiest interfaces on this one are two POS interfaces on VIP4-80 in Slot5 and
> one FE interface in VIP4-80 in Slot0. By "busy" I mean that during peak times
> load on them looks like this:
>
> FastEther1: in - 18Mbit, out - 32Mbit
> POS OC3-1: in - 53Mbit, out - 77Mbit
> POS OC3-2: in - 120Mbit, out - 63Mbit
>
> Total load (mind that POS PA to POS PA traffic does go through MEMD on RSP,
> even if they are on the same VIP) comes to: 363Mbit times 2 (because all of
> this is on the same cybus) = 726Mbit.
>
> Considering cybus capacity is 1066Mbps, we get 726Mbps ~ 68% cybus
> utilization.
>
> Could somebody please verify that my assuptions are correct?
>
> P.S. Yes, I know that not all of the traffic is between these interfaces and
> there are others, with inter-cybus traffic, but just for simplicity sake take
> my numbers at face value. ;)
>
> Thanks,
> --
> D.K.

-- 

#------------------------------------------------------------------# # _.|._.|._ | Richard Gallagher | Direct: +32 2 704 5421 # # Cisco Systems | CCIE #7211 | Email: rgallagh@cisco.com # #------------------------------------------------------------------#



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