[c-nsp] ASR1002 + ASR 1004

[Mark Tinka]

On Monday, January 30, 2012 12:15:06 PM CiscoNSP_list 
CiscoNSP_list wrote:

> So the 1004 supports ESP10 or 20 (So up to 20Gb), but
> also supports the SIP40(40Gb) - The 1004 can only do up
> to 20Gb though correct? So what does the SIP40
> provide?(40Gb aggregate bandwidth per "slot"...but the
> ESP20 only can do 20Gb?)

There is an ESP40 as well.

> The SIP's also appear to have SPA slots?

Yes. The sole purpose of the SIP is to provide an interface 
between the SPA's and the router's mid-plane (with eventual 
internal connections to the ESP).

If you're familiar with other router architectures that have 
a similar practice, think of the Cisco FlexWAN modules that 
swallowed 7200 PA's, or the Juniper FPC's that swallow 
PIC's, or the XR 12000 SIP-401, SIP-501 and SIP-601 that 
swallow SPA's, or the CRS Flexible Interface Modules that 
swallow SPA's, e.t.c.

While the SIP's don't participate in the forwarding process, 
they provide packet classification, buffering, clocking and 
software driver management for the SPA's.

> So does this
> mean that the 1004 (With 8 SPA slots), would have an
> additional 4 SPA slots?

Not quite. Each SIP provides 4x SPA slots. These 4x SPA 
slots can swallow 4x single-heights SPA's or 2x dual-height 
SPA's.

The number of supported SPA slots per SIP is generally based 
on single-height SPA's.

For the ASR1004, only 2x SIP's are supported, meaning you 
can have up to 8x single-height SPA's in that chassis.

Cheers,

Mark.
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