[NNagain] New Exclusive Report on 'Rip and Replace'
rjmcmahon
rjmcmahon at rjmcmahon.com
Fri Mar 22 12:28:57 EDT 2024
Interesting story. Thanks for sharing. It seems the good ol' reboot is a
form of resurrection that rebirths hardware back to an origin state.
Maybe tell your sales guys, if you have any, that 30-40 hrs of uptime is
quite a long time in muon years!
about 2.2 μs
Muons have quite short lifetimes of about 2.2 μs at rest before they
decay. However due to special relativity they have much longer lifetimes
while travelling at high speeds. By slowing down these high speed muons,
the muon decay constant at rest and the distribution of muon lifetimes
was obtained.
https://www.ucl.ac.uk/~zcapg66/work/Muon.pdf
Congrats on getting a network up for your community!!
Bob
> Your ctrl-alt-delete story made me think of one from my childhood.
>
> When I was a kid in high school, our phone service at home had a
> strange bug: every night around 10:30 or so the phone lines would go
> dead for about two minutes. This annoyed me to no end, not just
> because it would drop any calls I happened to be on, but if either
> side called back later the phones would ring and wake up the whole
> damn house. I even tried asking AT&T about it but they said everything
> looked fine on their side. This drove me absolutely nuts, cause it was
> the mid-2000s and a lot of my peers were starting to have cell phones,
> but they didn’t work (still don’t) in the mountains outside town
> where I lived. For a sixteen year old it was frustrating enough to be
> the one kid who doesnt have a phone and can’t text, even more
> embarrassing to not be able to talk late at night!
>
> Anyways, I went off to college and studied computers, but occasionally
> thought about that bug and always wondered what on earth it could have
> been. Fast forward fifteen years and I’m building my first real
> town-scale network, serving about 500 people off a few cell towers.
> Some of the code I’m running keeps hitting OOM errors after about
> 30-40hrs of uptime, inducing network instability and unexpected
> crashes. The quick and dirty (and very effective) solution is to
> reboot the network once a day. Ideally in the middle of the night when
> the least number of users are active. Sorry, past me.
>
>> On Mar 21, 2024, at 18:24, rjmcmahon via Nnagain
>> <nnagain at lists.bufferbloat.net> wrote:
>> Oh, how I wish that an open source programmer showing up on a white
>> horse, with gnu emacs and a so-called "firmware" upgrade would fix
>> all these issues. Sadly, likely not. (Also, many of us have been
>> building systems with hot swap and active redundancy supporting live
>> upgrades our entire careers. Then there is also BGP to deal with
>> route changes. So, yes, here "rip and replace" is a b.s. title
>> designed to drive passions of what's not always real!!)
>>
>> A TLDR story (for those needing something, something not from chat
>> gpt, to read at night.)
>>
>> Early in my career we designed a router blade for an ethernet switch
>> (very early days of ethernet switches.) The switch engineers did
>> their work in ASICs and there was no merchant silicon in those days.
>> The equipment market was vertical. We evaluated the various internal
>> ASICs from the switch teams and made our selection. Note: The turn
>> around of an ASIC can be in years so hw devices are what Amazon
>> calls "one way doors." They call software "two way doors" as the
>> counterpart. We were selling to the RBOCs, and in those days (not
>> these FWA days,) the bell-heads really stressed five 9's of
>> reliability. We needed "bug free" hw per these customer demands. So
>> we did our homework and found the most reliable ASIC to interface
>> into the switching fabric.
>>
>> The linecard sold $350M in 1990s dollars in its first year. Then we
>> got a call from the RBOC saying their NOC was having serious data
>> flow problems. We went into their NOC, connected up all the gazintas
>> and gazuotas to see what was going on.
>>
>> Well, under certain conditions, that ASIC was causing the switching
>> fabric to lose it's coherency with the switching decision ASIC. The
>> switching decision was for a previous packet and not the actual
>> packet. (Similar to what happened to some immigrants from Ellis
>> Island that ended up in Houston, Texas vs Houston St in NYC. Seemed
>> close but just not correct.)
>>
>> Yikes! We exclaimed. So we immediately went to the hardware
>> architect and asked for a rev for the ASIC w/o the bug. He said
>> maybe in two years, but probably not, because the ASIC volume was
>> too low to rev it.
>>
>> We were up the proverbial creek. Then we came up with a software (or
>> firmware) fix of watching via sampling the hw switching bus and the
>> hw switching tables to see when they became incoherent. It was
>> relatively infrequent, like a few times a month.
>>
>> So what did we do to actually fix this? The old ctl-alt-delete
>> salute of the switching system. Every packet in flight was dropped
>> and TCP state machines everywhere were signaled to go back to slow
>> start, even though this had nothing to do with TCP congestion.
>>
>> This is a common practice by software to reset hardware when it
>> loses its brain. This really is not a fix at all. The proper fix is
>> to replace the buggy hardware, using active upgrade & swap approach
>> and no firmware upgrade can do that when hw is too old for NRE
>> spends. These are all just the way things really are from my
>> experience.
>>
>> Bob
>>
>>> I have been trying to point out for many years now, that a lot of
>>> hardware can just have it's firmware replaced with something more
>>> trustable, secure, reliable, and feature full. I was appalled at
>>> the
>>> recent BOFO (?) rules that mandated buy american for secure ....
>>> glass
>>> .... and totally ignored the firmware problem. I have not read up
>>> on
>>> rip and replace progress below, and am afraid to, if someone could
>>> summarize?
>>> Ironically, I regard Huwai's compliance with the GPL, and general
>>> open
>>> source contribution philosophy as exemplary in an industry that
>>> seemingly has forgotten the benefits of openness or the copyright
>>> provisions of that license.
>>> The president of huwai once responded to complaints by promising
>>> to
>>> open up all it's source code for inspection... (cannot find the
>>> link),
>>> but the CISCOs of the world evaporated that possibility, and the
>>> mess
>>> downstream of most chinese AND american manufacturers has to be
>>> scanned to be believed.
>>> ... a lot of huwai's consumer gear can be reflashed to OpenWrt,
>>> which
>>> is maintained by a group of very security concious folk, mostly
>>> based
>>> in germany.
>>> ---------- Forwarded message ---------
>>> From: Broadband Breakfast <news at broadbandcensus.com>
>>> Date: Thu, Mar 21, 2024 at 9:23 AM
>>> Subject: New Exclusive Report on 'Rip and Replace'
>>> To: Dave Taht <dave.taht at gmail.com>
>>> Broadband Breakfast Live Online Every Wednesday at 12 Noon ET
>>> View this email in your browser [1]
>>> [2]
>>> 'RIP AND REPLACE'
>>> THE POLICY AND LAW BEHIND 'RIP AND REPLACE' [3]
>>> [4]
>>> Emerging reports signal a growing concern among telecommunications
>>> providers grappling with compliance to the Federal Communications
>>> Commission's mandate to excise problematic equipment from certain
>>> Chinese companies.
>>> Amid this regulatory melange, providers are finding themselves at
>>> a
>>> crossroads, with the daunting task of navigating stringent
>>> regulations, facing the financial brunt of equipment replacement,
>>> and
>>> contending with the ambiguity surrounding funding mechanisms for
>>> such
>>> extensive undertakings.
>>> At the heart of this unfolding scenario is the "rip and replace"
>>> program, a cornerstone initiative under the Secure and Trusted
>>> Communications Networks Act of 2019 [5], designed to fortify the
>>> nation's telecommunications infrastructure against potential
>>> espionage
>>> and cyber threats.
>>> This comprehensive effort [6]not only mandates the purging of
>>> equipment from companies like Huawei Technologies and ZTE
>>> Corporation,
>>> deemed security risks, but also underscores a pivotal shift
>>> towards
>>> securing the integrity and reliability of U.S. telecommunications
>>> networks.
>>> As the FCC enforces this order, the ripple effects are palpable,
>>> spanning legal and financial implications for compliant companies
>>> and
>>> operational challenges that demand innovative solutions, all while
>>> setting a precedent for how national security considerations are
>>> increasingly shaping the telecommunications landscape.
>>> _WHAT IS 'RIP AND REPLACE'?_
>>> The rip and replace initiative, officially part of the initiatives
>>> under the Secure and Trusted Communications Networks Act of 2019
>>> [7],
>>> is a Federal Communications Commission effort aimed at enhancing
>>> national security within the country's telecommunications
>>> infrastructure.
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>>
> https://mailchi.mp/broadbandcensus/broadband-maps-from-providers-need-to-be-checked-with-data-from-users-4746958-unsh77cz1u-4747010?e=62f1e7a8b2
>>> [2]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=2942c43d06&e=62f1e7a8b2
>>> [1]
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>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=aa889f3f96&e=62f1e7a8b2
>>> [2]
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> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=7a63842898&e=62f1e7a8b2
>>> [3]
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> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=71ee2b1df3&e=62f1e7a8b2
>>> [4]
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> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=5d7ef10837&e=62f1e7a8b2
>>> [5]
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> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=dc620d7161&e=62f1e7a8b2
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>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=7eaabbc42f&e=62f1e7a8b2
>>> [7]
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>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=b0cb6f597e&e=62f1e7a8b2
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> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=e7b2de2d13&e=62f1e7a8b2
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> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=9ab17132fd&e=62f1e7a8b2
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> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=73473b9966&e=62f1e7a8b2
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> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=f3acf305fe&e=62f1e7a8b2
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> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=3f3e0d1dfb&e=62f1e7a8b2
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>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=0e558c9717&e=62f1e7a8b2
>>> [34]
>>> [36]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=3147247da1&e=62f1e7a8b2
>>> [35]
>>> [37]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=8e8431b3ea&e=62f1e7a8b2
>>> [36]
>>> [38]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=bb7051d850&e=62f1e7a8b2
>>> [37]
>>> [39]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=0908bce4bf&e=62f1e7a8b2
>>> [38]
>>> [40]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=0d80971a8c&e=62f1e7a8b2
>>> [39]
>>> [41]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=9ffcb8cfd1&e=62f1e7a8b2
>>> [40]
>>> [42]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=c706a82c3c&e=62f1e7a8b2
>>> [41]
>>> [43]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=5db208b638&e=62f1e7a8b2
>>> [42]
>>> [44]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=b5a0318928&e=62f1e7a8b2
>>> [43]
>>> [45]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=c55c3d98b5&e=62f1e7a8b2
>>> [44]
>>> [46]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=5d5ea38a15&e=62f1e7a8b2
>>> [45]
>>> [47]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=482b0cbeda&e=62f1e7a8b2
>>> [46]
>>> [48]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=3e0edf7381&e=62f1e7a8b2
>>> [47]
>>> [49]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=c91b53aa0f&e=62f1e7a8b2
>>> [48]
>>> [50]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=4b56040974&e=62f1e7a8b2
>>> [49]
>>> [51]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=2e491c6b54&e=62f1e7a8b2
>>> [50]
>>> [52]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/vcard?u=5637f8058831c038004b4f502&id=89ee35bd4e
>>> [51]
>>> [53]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/profile?u=5637f8058831c038004b4f502&id=89ee35bd4e&e=62f1e7a8b2&c=78c4b0d97e
>>> [52]
>>> [54]
>>>
>>
> https://BroadbandBreakfast.us3.list-manage.com/unsubscribe?u=5637f8058831c038004b4f502&id=89ee35bd4e&t=b&e=62f1e7a8b2&c=78c4b0d97e
>>> [53]
>>> _______________________________________________
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>> _______________________________________________
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>> Nnagain at lists.bufferbloat.net
>> https://lists.bufferbloat.net/listinfo/nnagain
>
>
>
> Links:
> ------
> [1]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=2942c43d06&e=62f1e7a8b2
> [2]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=aa889f3f96&e=62f1e7a8b2
> [3]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=7a63842898&e=62f1e7a8b2
> [4]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=71ee2b1df3&e=62f1e7a8b2
> [5]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=5d7ef10837&e=62f1e7a8b2
> [6]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=dc620d7161&e=62f1e7a8b2
> [7]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=7eaabbc42f&e=62f1e7a8b2
> [8]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=b0cb6f597e&e=62f1e7a8b2
> [9]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=e7b2de2d13&e=62f1e7a8b2
> [10]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=9ab17132fd&e=62f1e7a8b2
> [11]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=73473b9966&e=62f1e7a8b2
> [12]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=f3acf305fe&e=62f1e7a8b2
> [13]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=3f3e0d1dfb&e=62f1e7a8b2
> [14]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=511ee29008&e=62f1e7a8b2
> [15]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=23c5f1fe02&e=62f1e7a8b2
> [16]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=85ccef98a9&e=62f1e7a8b2
> [17]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=bae8a27942&e=62f1e7a8b2
> [18]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=9ee96a8d56&e=62f1e7a8b2
> [19]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=1f6ef48d27&e=62f1e7a8b2
> [20]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=362746d7a4&e=62f1e7a8b2
> [21]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=0d849a3197&e=62f1e7a8b2
> [22]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=c15861f4fd&e=62f1e7a8b2
> [23]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=a43d388573&e=62f1e7a8b2
> [24]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=4f7737a7ef&e=62f1e7a8b2
> [25]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=ea0ae5e98f&e=62f1e7a8b2
> [26]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=f485dfc5a9&e=62f1e7a8b2
> [27]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=fc212dc8fc&e=62f1e7a8b2
> [28]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=4f028aeedd&e=62f1e7a8b2
> [29]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=3bcc1bd114&e=62f1e7a8b2
> [30]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=b686490934&e=62f1e7a8b2
> [31]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=9882e3ce45&e=62f1e7a8b2
> [32]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=991288f3aa&e=62f1e7a8b2
> [33]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=5ec0998466&e=62f1e7a8b2
> [34]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=0e558c9717&e=62f1e7a8b2
> [35]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=3147247da1&e=62f1e7a8b2
> [36]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=8e8431b3ea&e=62f1e7a8b2
> [37]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=bb7051d850&e=62f1e7a8b2
> [38]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=0908bce4bf&e=62f1e7a8b2
> [39]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=0d80971a8c&e=62f1e7a8b2
> [40]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=9ffcb8cfd1&e=62f1e7a8b2
> [41]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=c706a82c3c&e=62f1e7a8b2
> [42]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=5db208b638&aTBrown@pasek.commp;e=62f1e7a8b2
> [43]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=b5a0318928&e=62f1e7a8b2
> [44]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=c55c3d98b5&e=62f1e7a8b2
> [45]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=5d5ea38a15&e=62f1e7a8b2
> [46]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=482b0cbeda&e=62f1e7a8b2
> [47]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=3e0edf7381&e=62f1e7a8b2
> [48]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=c91b53aa0f&e=62f1e7a8b2
> [49]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=4b56040974&e=62f1e7a8b2
> [50]
> https://broadbandbreakfast.us3.list-manage.com/track/click?u=5637f8058831c038004b4f502&id=2e491c6b54&e=62f1e7a8b2
> [51]
> https://broadbandbreakfast.us3.list-manage.com/vcard?u=5637f8058831c038004b4f502&id=89ee35bd4e
> [52]
> https://broadbandbreakfast.us3.list-manage.com/profile?u=5637f8058831c038004b4f502&id=89ee35bd4e&e=62f1e7a8b2&c=78c4b0d97e
> [53]
> https://broadbandbreakfast.us3.list-manage.com/unsubscribe?u=5637f8058831c038004b4f502&id=89ee35bd4e&t=b&e=62f1e7a8b2&c=78c4b0d97e
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