(TIL) Today I Learned...

Started by Seittit, January 13, 2015, 03:50:21 AM

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deanwebb

#255
July 21, 2017, 03:01:26 PM
TIL that my air conditioner won't be able to be fixed until tomorrow.

I am now one night closer to getting Hilton Diamond level this year...
Take a baseball bat and trash all the routers, shout out "IT'S A NETWORK PROBLEM NOW, SUCKERS!" and then peel out of the parking lot in your Ferrari.
"The world could perish if people only worked on things that were easy to handle." -- Vladimir Savchenko
Вопросы есть? Вопросов нет! | BCEB: Belkin Certified Expert Baffler | "Plan B is Plan A with an element of panic." -- John Clarke
Accounting is architecture, remember that!
Air gaps are high-latency Internet connections.

wintermute000

#256
July 21, 2017, 10:02:52 PM
Quote from: Otanx on July 21, 2017, 01:41:36 PM
TIL that 6500 VSS is a bigger mess than I thought. Do you want to upgrade firmware? We have this cool ISSU/eFSU thing that will let you upgrade one chassis/sup card at a time. Oh, you want to upgrade from 15.1 to 15.2? You can't use ISSU. Need to reboot both at the same time.

Tomorrow I Learn (TIL) how to break a VSS with minimal down time.

-Otanx


This is why I tell people go avoid VSS / stacks for anything that needs five nines uptime. Its all gravy until you need to upgrade, and/or when an upgrade or bug takes out the shared blast radius I mean control plane.
A colleague of mine watched foobar a VSS ISSU following step by step TAC instructions (TAC was on the line the whole time...) - took a hospital offline for 3 hours whilst they restored everything manually, the ISSU process wiped both sups on both chassis LOL. Mind you this was with first gen buggy VSS code, but the point stands. He has since then point blank refused to execute any VSS ISSU, always insists he needs a full reload and the short outage associated.

icecream-guy

#257
July 23, 2017, 03:02:09 PM
Quote from: Otanx on July 21, 2017, 01:41:36 PM

Tomorrow I Learn (TIL) how to break a VSS with minimal down time.

-Otanx

:lol:, good luck with that one.... :rage:
:professorcat:

My Moral Fibers have been cut.

icecream-guy

#258
July 25, 2017, 06:25:37 AM
TIL (well yesterday) about Cisco FXOS
:professorcat:

My Moral Fibers have been cut.

deanwebb

#259
July 25, 2017, 09:38:56 AM
TIL about the TCP Finite State Model.
Take a baseball bat and trash all the routers, shout out "IT'S A NETWORK PROBLEM NOW, SUCKERS!" and then peel out of the parking lot in your Ferrari.
"The world could perish if people only worked on things that were easy to handle." -- Vladimir Savchenko
Вопросы есть? Вопросов нет! | BCEB: Belkin Certified Expert Baffler | "Plan B is Plan A with an element of panic." -- John Clarke
Accounting is architecture, remember that!
Air gaps are high-latency Internet connections.

icecream-guy

#260
October 27, 2017, 06:11:54 AM
well not today, but a few days ago I learned that if you use secureCRT...   back up the configs directory...  life sucks when you lose all your saved sites, button bars, custom configurations, etc...
:professorcat:

My Moral Fibers have been cut.

deanwebb

#261
October 27, 2017, 08:34:28 AM
TIL that working for a company on the day of its IPO entails rather a lot of official celebrating.

Me looking at my schedule for today:

:greatoffer:
Take a baseball bat and trash all the routers, shout out "IT'S A NETWORK PROBLEM NOW, SUCKERS!" and then peel out of the parking lot in your Ferrari.
"The world could perish if people only worked on things that were easy to handle." -- Vladimir Savchenko
Вопросы есть? Вопросов нет! | BCEB: Belkin Certified Expert Baffler | "Plan B is Plan A with an element of panic." -- John Clarke
Accounting is architecture, remember that!
Air gaps are high-latency Internet connections.

icecream-guy

#262
November 03, 2017, 01:41:03 PM
Quote from: deanwebb on October 27, 2017, 08:34:28 AM
TIL that working for a company on the day of its IPO entails rather a lot of official celebrating.


Is that why IPO stocks always seem to go down after the IPO?
:professorcat:

My Moral Fibers have been cut.

deanwebb

#263
November 03, 2017, 02:41:06 PM
Quote from: ristau5741 on November 03, 2017, 01:41:03 PM
Quote from: deanwebb on October 27, 2017, 08:34:28 AM
TIL that working for a company on the day of its IPO entails rather a lot of official celebrating.


Is that why IPO stocks always seem to go down after the IPO?

No, not really... most of that has to do with general trends in investing, initial backers taking profits up front, stuff like that.
Take a baseball bat and trash all the routers, shout out "IT'S A NETWORK PROBLEM NOW, SUCKERS!" and then peel out of the parking lot in your Ferrari.
"The world could perish if people only worked on things that were easy to handle." -- Vladimir Savchenko
Вопросы есть? Вопросов нет! | BCEB: Belkin Certified Expert Baffler | "Plan B is Plan A with an element of panic." -- John Clarke
Accounting is architecture, remember that!
Air gaps are high-latency Internet connections.

packetferret

#264
November 20, 2017, 04:15:42 PM
TIL that I still had an account here.

deanwebb

#265
November 21, 2017, 09:38:24 AM
Quote from: packetferret on November 20, 2017, 04:15:42 PM
TIL that I still had an account here.

I lol'd. :lol:

And you still remember the password. Either that, or your browser/password manager remembered it.
Take a baseball bat and trash all the routers, shout out "IT'S A NETWORK PROBLEM NOW, SUCKERS!" and then peel out of the parking lot in your Ferrari.
"The world could perish if people only worked on things that were easy to handle." -- Vladimir Savchenko
Вопросы есть? Вопросов нет! | BCEB: Belkin Certified Expert Baffler | "Plan B is Plan A with an element of panic." -- John Clarke
Accounting is architecture, remember that!
Air gaps are high-latency Internet connections.

deanwebb

#266
November 28, 2017, 08:00:41 AM
TIL that I'm going to learn more about Palo Alto integration with ForeScout CounterACT.

Also ServiceNow integration...

Also also SWIFT regulations...
Take a baseball bat and trash all the routers, shout out "IT'S A NETWORK PROBLEM NOW, SUCKERS!" and then peel out of the parking lot in your Ferrari.
"The world could perish if people only worked on things that were easy to handle." -- Vladimir Savchenko
Вопросы есть? Вопросов нет! | BCEB: Belkin Certified Expert Baffler | "Plan B is Plan A with an element of panic." -- John Clarke
Accounting is architecture, remember that!
Air gaps are high-latency Internet connections.

icecream-guy

#267
November 28, 2017, 10:44:11 AM
Quote from: deanwebb on November 28, 2017, 08:00:41 AM
TIL that I'm going to learn more about Palo Alto integration with ForeScout CounterACT.

Also ServiceNow integration...



Do write up a summary on those, We've got all three products.  That'd be interesting.
:professorcat:

My Moral Fibers have been cut.

deanwebb

#268
November 28, 2017, 11:44:27 AM
Yeah, that's what I have to do, eventually... write the best practices doc for CounterACT's integration with those two products.

Take a baseball bat and trash all the routers, shout out "IT'S A NETWORK PROBLEM NOW, SUCKERS!" and then peel out of the parking lot in your Ferrari.
"The world could perish if people only worked on things that were easy to handle." -- Vladimir Savchenko
Вопросы есть? Вопросов нет! | BCEB: Belkin Certified Expert Baffler | "Plan B is Plan A with an element of panic." -- John Clarke
Accounting is architecture, remember that!
Air gaps are high-latency Internet connections.

LynK

#269
December 08, 2017, 01:54:18 PM
Not today, but last friday.

I learned that the capwap tunneling on the 2800 series APs requires that you adjust the MTU (1300) because it is running click-os. Troubleshooting pretty much all day why web browsing worked in certain parts of the building and not in others when I could ping/trace-route. Kicking myself for not finding it when it screamed fragmentation.

My next step was to wireshark too...
Sys Admin: "You have a stuck route"
            Me: "You have an incorrect Default Gateway"
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