[c-nsp] Understanding ASR1k / ESP40 capacity

[Pete Lumbis]

It would be a single pass through the QFP. The SIP could also be a limiting
factor, but since you are split between SIPs that shouldn't be an issue.
The SIP 40 has 2x 40Gig lanes on the backplane. Are you doing crypto or
anything like that which would impact performance?

There is a great Cisco Live preso on the ASR1k architecture that might help
you get some ammo to go back to TAC with.
http://d2zmdbbm9feqrf.cloudfront.net/2014/usa/pdf/BRKARC-2001.pdf

-Pete

On Sat, Oct 4, 2014 at 4:56 AM, Simon Lockhart <simon at slimey.org> wrote:

> All,
>
> I'm banging my head against a brick wall trying to get sensible answers
> from
> Cisco TAC, so thought I'd ask the educated masses who may have come across
> this before...
>
> I've got a Cisco ASR1004 with RP2, ESP40, 2 * SIP40's, and 8 * 10GE ports.
>
> A snapshot of usage on these ports at peak is:
>
> Interface         RxBps     RxPps          TxBps     TxPps
> Te0/0/0   4,385,563,000   515,508    906,118,000   339,997
> Te0/1/0   3,942,338,000   419,696    984,150,000   358,436
> Te0/2/0   3,949,993,000   425,192    933,257,000   349,145
> Te0/3/0   4,375,526,000   512,858    873,284,000   334,751
> Te1/0/0   1,186,440,000   454,714  5,474,029,000   630,916
> Te1/1/0     622,154,000   244,056  3,181,689,000   338,190
> Te1/2/0     711,493,000   253,275  3,211,560,000   340,950
> Te1/3/0   1,218,873,000   437,195  4,831,708,000   568,488
>
> TOTAL    20,392,380,000 3,262,494 20,395,795,000 3,260,873
>
> I'm seeing throughput issues on a portchannel consisting of Te0/0/0 and
> Te0/3/0
> (it won't go over 10Gbps aggregate)
>
> Cisco TAC are telling me if I add TxBps and RxBps totals together, I get
> 40Gbps,
> so I've reached capacity of the QFP (i.e. ESP40).
>
> My arguement against this is that a packet which enters the router on
> Te0/0/0,
> goes through the SIP40 in slot 0, through the ESP40, through the SIP40 in
> slot
> 1, and out through Te1/0/0 is still just one packet, so should only need
> to be
> counted once through the ESP, and once for each SIP. Hence, the throughput
> on
> the ESP is only 20.3Gbps on those numbers above.
>
> If I poll ceqfpUtilProcessingLoad by SNMP, I see peaks of around 65%, which
> would correlate with this level of throughput.
>
> I'm assuming there are others of you using this platform. What sort of
> throughput are you seeing? Am I right, or is the Cisco TAC engineer?
>
> TIA,
>
> Simon
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