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d0d9 I’m working with a Cisco d0d9 service referred to as d0d9 ThousandEyes d0d9 . Now, the perfect software d0d9 of ThousandEyes could be to d0d9 identify issues, particularly with cloud d0d9 providers. For those who provide d0d9 a service within the cloud d0d9 and prospects are complaining about d0d9 efficiency, ThousandEyes can reveal the d0d9 place the bottlenecks exist. Then d0d9 you may execute a plan d0d9 of motion to get the d0d9 problems addressed. However, indulge me d0d9 a second to elucidate the d0d9 excuse d0d9 I’m d0d9 utilizing to play with d0d9 it.
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d0d9 I just lately handed my d0d9 Novice Radio examination to get d0d9 licensed once more after letting d0d9 my Superior license expire 30 d0d9 years in the past. Earlier d0d9 than I share my new d0d9 name signal, right here’s a d0d9 word for the good thing d0d9 about non-hams (ham is frequent d0d9 lingo for an Novice Radio d0d9 operator). It’s customary to make d0d9 use of a normal phonetic d0d9 alphabet when giving your name d0d9 signal on the air. For d0d9 instance, WB2GJ could be Whiskey d0d9 Bravo 2 Golf Juliet. However d0d9 somebody may say WB2 George d0d9 Jetson only for enjoyable. (For d0d9 those who acknowledge the identify, d0d9 you’re relationship your self. And d0d9 no hams have been doxed d0d9 for this weblog; there isn’t d0d9 a WB2GJ.)
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d0d9 I point out this as d0d9 a result of the FCC d0d9 assigns KI5VDI as my new d0d9 name signal. I didn’t suppose d0d9 any name signal might be d0d9 worse than the one I d0d9 had in Colorado, KB0FU. Yeah, d0d9 say that one out loud d0d9 and also you’ll get it. d0d9 However KI5VDI? I simply know d0d9 somebody will say or at d0d9 the least suppose “KI5 Venereal d0d9 Illness An infection”. So, I d0d9 buy an arrogance name signal d0d9 much like my authentic Superior d0d9 name signal, WB2EWS. I get d0d9 N2EWS. That’s excellent news. I’m d0d9 now cured of Venereal Illness d0d9 An infection.
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d0d9 As a revitalized ham, I d0d9 discover myself listening to a d0d9 dialog on 2 meters. (We d0d9 hams confer with frequency ranges d0d9 by their approximate wavelength. The d0d9 144-148 MHz frequency wavelength is d0d9 about 2 meters.) Individuals you d0d9 communicate with on the 2-meter d0d9 band are usually very shut d0d9 by. These indicators don’t journey d0d9 far until you may have d0d9 the chance to do one d0d9 thing fancy pants like bounce d0d9 your sign off a meteor. d0d9 Even then, voice communication could d0d9 be just about unimaginable. So, d0d9 I’m shocked to listen to d0d9 an area Texan speaking with d0d9 somebody in South Korea. How? d0d9 Repeaters prolong the vary on d0d9 2 meters so your indicators d0d9 can bounce over objects like d0d9 mountains or tall buildings, however d0d9 even a daisy chain of d0d9 repeaters isn’t going to succeed d0d9 in South Korea.
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d0d9 It seems they’re utilizing d0d9 EchoLink d0d9 . This free software program d0d9 allows you to hyperlink your d0d9 radio to your pc and d0d9 join wherever with VoIP. You d0d9 discuss on the radio, and d0d9 EchoLink forwards all the pieces d0d9 to the distant location, usually d0d9 the opposite particular person’s radio d0d9 related to EchoLink.
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d0d9 I obtain and set up d0d9 EchoLink to offer it a d0d9 attempt. Being a Cisco man, d0d9 the very first thing I d0d9 take into consideration is how d0d9 dependable VoIP will probably be d0d9 with this software program and d0d9 EchoLink locations. Community latency and d0d9 jitter generally is a downside d0d9 for VoIP.
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d0d9 That is the place ThousandEyes d0d9 (lastly) is available in. ThousandEyes d0d9 analyzes community visitors intimately. Truthful d0d9 warning: This isn’t a typical d0d9 cause for utilizing ThousandEyes, and d0d9 I’m utilizing ICMP to simplify d0d9 the check. Usually you’d use d0d9 TCP and a port to d0d9 get a extra lifelike view. d0d9 Sadly, EchoLink doesn’t like assessments d0d9 on its VoIP port. However d0d9 even these easy ICMP outcomes d0d9 are very attention-grabbing.
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d0d9 I see that EchoLink chooses d0d9 a server in San Diego d0d9 for my connection (nasouth.echolink.org). Once d0d9 I use EchoLink for ham d0d9 radio, I’ll apply it to d0d9 my private PC. However I’m d0d9 testing it on my work d0d9 PC, which provides a degree d0d9 of complexity since I exploit d0d9 a d0d9 Meraki d0d9 router on the Cisco d0d9 community. I set up a d0d9 ThousandEyes agent on my work d0d9 PC so I can check d0d9 the community from my work d0d9 PC to the EchoLink server. d0d9 The agent isn’t working. What’s d0d9 my boggle? The agent is d0d9 a Chrome extension and I’m d0d9 utilizing Firefox. No downside. I d0d9 swap to Chrome and be d0d9 effectively.
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d0d9 I run the primary check. d0d9 The trail visualization (see Determine d0d9 1) reveals some attention-grabbing data. d0d9 The blue dots are nodes d0d9 which have ThousandEyes brokers. Once d0d9 I click on on a d0d9 blue dot, it reveals the d0d9 node data. The empty circles d0d9 with numbers are unidentified node d0d9 hops. The quantity tells you d0d9 what number of unidentified hops d0d9 there are in that chain. d0d9 Not each node within the d0d9 Interwebs is provided for ThousandEyes, d0d9 but.
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d0d9 The desk view reveals the d0d9 latency and jitter. The jitter d0d9 is larger than I anticipated, d0d9 however it shouldn’t be an d0d9 issue.
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d0d9 That’s solely half of an d0d9 EchoLink connection, although. The opposite d0d9 half would go from the d0d9 contact in South Korea to d0d9 the San Diego server. If d0d9 you outline a ThousandEyes check, d0d9 you may decide a number d0d9 of brokers from wherever on d0d9 this planet. I may even d0d9 choose a number of international d0d9 locations at a time for d0d9 a single check. On this d0d9 case, I solely need one d0d9 nation, South Korea. However I d0d9 can specify a number of d0d9 South Korea nodes as beginning d0d9 factors.
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d0d9 The desk beneath reveals that d0d9 each one however one supply d0d9 in South Korea have very d0d9 low latency and jitter. However d0d9 even the three.2ms jitter is d0d9 unlikely to be an issue.
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d0d9 Now let’s take a look d0d9 at the paths. There are d0d9 sufficient hops to be an d0d9 IPA recipe. The purple strains d0d9 are hyperlinks between two nodes d0d9 the place the delay is d0d9 bigger than 100ms. It’s entertaining d0d9 to hover over the dots d0d9 to see visitors particulars. In d0d9 a single case, for Google d0d9 (gcp asia-northeast3), the primary bounce d0d9 is from South Korea to d0d9 Illinois! Azure koreacentral is the d0d9 one place to begin with d0d9 a path that has no d0d9 delays. Since not one of d0d9 the delays add as much d0d9 as a big latency, as d0d9 proven within the above desk, d0d9 the delays are unlikely to d0d9 be important when utilizing EchoLink.
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d0d9 Let’s attempt one other location d0d9 for Amber Heards and giggles. d0d9 How about war-torn Ukraine? Certainly d0d9 it will present community issues.
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d0d9 I see two IPv4 brokers d0d9 in Ukraine, one in Kyiv d0d9 and the opposite in Kharkiv. d0d9 Kyiv makes use of Deltahost d0d9 Firm. Kharkiv makes use of d0d9 Ukrainian Web Names Middle LTD. d0d9 The outcomes (see Determine 7) d0d9 are spectacular for a struggle d0d9 torn nation. Try Determine 8 d0d9 for the paths. No delays d0d9 and no useless ends. Do d0d9 we now have Elon Musk d0d9 to thank for this? I d0d9 click on on a couple d0d9 of blue dots and see d0d9 that a number of nodes d0d9 are via Cogent Communications.
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d0d9 General, EchoLink communications ought to d0d9 work very effectively, even to d0d9 Ukraine.
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d0d9 I’m impressed with ThousandEyes. As d0d9 extra routers develop into ThousandEyes d0d9 brokers, there ought to be d0d9 fewer and fewer unidentified nodes d0d9 in check outcomes. I’ll maintain d0d9 experimenting and report no matter d0d9 could also be attention-grabbing. You’ll d0d9 be able to try ThousandEyes d0d9 for your self within the d0d9 DevNet d0d9 ThousandEyes Intro Studying Lab d0d9 .
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d0d9 Within the meantime, I encourage d0d9 everybody to look into getting d0d9 licensed for Novice Radio. The d0d9 common age of licensed hams d0d9 is at present 68. Let’s d0d9 get a few of you d0d9 younger whippersnappers licensed. Till then, d0d9 73s and 88s to all d0d9 you ham radio operators, and d0d9 bye for now to the d0d9 remaining.
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d0d9 We’d love to listen to d0d9 what you suppose. Ask a d0d9 query or go away a d0d9 remark beneath. And keep related d0d9 with Cisco DevNet on social!
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