[c-nsp] channelized OC-12 for aggregation

[Stephen Cobb]

Geoff-

You've got some other [older] options - might as well throw these out
there...still supported by recent IOS:

6500/7600 OSM-1CHOC12/T1-SI (stopped shipping less than a couple years ago,
IIRC)
http://www.cisco.com/en/US/products/hw/modules/ps2831/products_data_sheet09186a008015cfe6.html

12000 CHOC12/DS1-IR-SC
http://www.cisco.com/en/US/prod/collateral/routers/ps167/product_data_sheet0900aecd80416929.html

I've worked with people trying to do something similar (consolidating a ton
of 7200s with ch-t3 cards into ch-oc12s) and, unlike at that point, both the
7600 and GSR blades are more readily available in the used market. Both have
a list price of $125k, so things get way too pricey if buying them new.
GSR/12000s are probably going to be the best bang-for-your buck if you're
comfortable with used stuff (assuming you don't need a bunch of LAN ports),
especially because it sounds like you don't need the Quantumflow ASR guts,
etc.

Hit me off-list if you want.
sc

-- 
Stephen F. Cobb • Senior Sales Engineer
CCNA/CCDA/DCNID/ATSP
Telecoast Communications, LLC • Santa Barbara, CA
o 877.677.1182 x272 • c 760.807.0570 • f 805.618.1610
aim/yahoo telecoaststephen

On Thu, May 13, 2010 at 9:12 AM, Geoffrey Pendery <geoff at pendery.net> wrote:

> We're an enterprise (not service provider) and our hub sites each
> aggregate about 10 DS-3's, a handful of OC-3's and a handful of DS1's.
> We're getting actual raw circuits from carriers (not Frame, ATM, MPLS,
> Ethernet, etc) and today we're aggregating them via MGX ATM switches -
> non-IP traffic like TDM voice trunks was a past requirement that is
> gradually fading away.
>
> We're starting to brainstorm our non-ATM future, and the current
> thinking is that we'll mux the various circuits up into channelized
> OC-12 router interfaces.
> >From cruising all the Cisco documentation, the hardware options seem
> to be pretty much confined to one particular SPA - SPA-1xCHOC12/DS0
> and just a question of what to put it into:
> ASR 1000's (which we've used a little and are optimistic about)
> 7600 Routers (which we're as comfortable with as is possible, given
> all the caveats and BU-split issues, including the fact that we're
> actually running SXH5 on ours right now)
> 12000 Routers (which we assume are out-of-our-league-expensive overkill)
>
> We're not talking about BGP, IPv6, or MPLS (at least, not yet, though
> they're likely to be required in the future...) just pretty
> conventional IPv4 routing stuff here.  We need fairly flexible/robust
> QoS, but Enterprise not Provider (10 buckets is more than enough, we
> don't need 100,000).  Only odd requirement I can think of is WCCP to
> connect possible WAN Accelerators.
>
> So my real questions :
> 1.  Anybody have experience with this particular SPA?  Good/bad?
> 2.  If we went with 7600, we'd have to switch to SRD from SXH - what
> sort of nasty surprises should I expect there?
> 3.  We're on regular 7600 chassis right now, not 7600-S, is there a
> compelling reason (like end-of-support - 2015? - or critical feature
> support lacking) that warrants getting off the "classic" 7600 chassis?
> 4.  Anybody got the warm and fuzzies using ASRs for this sort of
> thing?  1004 vs 1006?
> 5.  Am I missing an obvious option?
>
>
> Thanks,
> Geoff
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