James Kahkoska • ReluctantCTO [email protected] ... · Microsoft PowerPoint - WLPC...
Transcript of James Kahkoska • ReluctantCTO [email protected] ... · Microsoft PowerPoint - WLPC...
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simplicity • visibility • collaboration | 2
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Software Capability Maturity ModelJo
urne
y
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Community
Journey
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Maturity – Holistic View
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Stack
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Time
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Legacy
199510/100
201910/100
1000/25005000/10000
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Bits per Time Slice
1999 2019
Modulation
Line Coding
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Shannon's Theorem
maximum rate at which we can transmit the information without any error, is limited by the bandwidth, the signal level, and the noise level.
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Shannon in Practice
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NBASE-TUsing the Cable Plant in a manner never intended
Enormous network infrastructure asset in Cat 5e Cabling90% of installed base2003-2014 over 70 billion meters of Cat 5e cabling were installed
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NBASE-T
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Cable Coffin
UTP Cat 5
UTP Cat 3
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Link @100ftActual/Advertised
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@210ft Cat 5
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Impulse Noise
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Impulse
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Alien Crosstalk
https://archive.nbaset.ethernetalliance.org//wp-content/uploads/2016/08/NBT_CablingWhitePaper_090916.pdf
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WLPC 2020?
List of devices attached 129.196.196.181:5555 device product:etherscope_nxg model:EtherScope_nXGdevice:etherscope_nxg transport_id:1adb -t 1 shell etherscope_nxg:/ # exitset | grep AND ANDROID_SERIAL=129.196.196.181:5555
etherscope_nxg:/ # mii -ieno0 1.0085 41.0085 805f 1.0086 80531.0087 8059
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Takeaways
• Link time is indicative of downshift• Impulse noise matters• Length matters• Length in bundle matters
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PoEUsing the Cable Plant in a manner never intended
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Reference @10ft -1V
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@100ft -3V
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Link 210ft -5.1V
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@350 ft -8.3V
~1V per 42ft
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Firewalls
Don’t permit all IP protocols if you really mean a particular protocol. Firewalls are security devices, so don’t undermine your security.
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Firewalls
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portquiz.net:xxxx
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Firewallsdefine autotest
……
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WLAN or WAN?
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DHCP
v
1st DHCP request 2nd within lease
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simplicity • visibility • collaboration | 34Source: https://en.wikipedia.org/wiki/Residential_gateway
DHCP
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simplicity • visibility • collaboration | 35Source: https://en.wikipedia.org/wiki/Residential_gateway
DHCP
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VLAN
c
c
Set VLAN and Priority
Join VLAN 200, VPRI 5
v
c
Get a different subnet
v
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Maturity: Less Silos, More integration
Wi-Fi Tester Wired Tester
Network Management Systems
End-user Experience
2.4 5G
Scan Link
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Maturity
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Maturity: More Visibility
Names
IP Address
Services
L2 Ceiling
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