[nsp] Is 128MB enough for a full BGP table on a 7206VXR?
Vincent De Keyzer
vincent at dekeyzer.net
Tue Feb 24 12:03:18 EST 2004
but how come I don't observe I/O-2 on all my other 7206VXRs?
> On the 72xx, system memory is divided into the three
> categories you observed (processor, I/O, and I/O-2). I/O-2
> is referred to as PCI memory on legacy (i.e., non-VXR)
> platforms. The function of each of these pools is:
> Processor memory: This pool is used for storing the Cisco
> IOS software
> code, the routing tables, and the system buffers. It's
> allocated from the DRAM on the NPE-100, NPE-150, and the
> NPE-200; the SDRAM region on the NPE-175 and NPE-225; and
> SDRAM bank 1 on the NPE-300.
> I/O memory: This pool is used for particle pools. Both
> the interface
> private pools and the public particle pool are allocated
> from this memory. The size of this memory depends on the
> type of NPE. The NPE-150 and the NPE-200 both have a fixed
> amount of SRAM that is used for a form of Input/Output (I/O)
> memory: 1 MB for the NPE-150 and 4 MBs for the NPE-200. The
> NPE-300 uses its SDRAM bank 0 which is fixed at 32 MB.
> PCI memory: This small pool is mainly used for interface
> receive and
> transmit rings. It is sometimes used to allocate private
> interface particle pools for high-speed interfaces. On
> NPE-175, NPE-225, and NPE-300 systems, this pool is created
> in SDRAM. On the NPE-150 and NPE-200, it's created entirely
> on SRAM.
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