TheBrothersWISP 64 – CHR/Virtual Routers, MUM Spec, Your Lab



Greg, Wilson, Andrew Cox, and Mike put all those other sucker MCs to shame.

This cast we talk about:
Slack updates
CHR virtio-scsi driver/CHR additions in recent RC
Virtual routing
ASICs to CPU routing, and back to ASICs
What does your network lab look like?
Upcoming events

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TheBrothersWISP 63 – Mikrotik NL 80, Network Coach, Sales People



Join Tomas, Mike, and Greg as we roll the D20, and forage through our bag of holding.

This cast we talk about:
Mikrotik updates
wap-60g
hap-ac2
cap-ac
Newsletter 80
USB-powered MT
Getting a network coach.
Account manager vs. sales vs. sales support vs. sales engineer
The boring company’s flame thrower

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TheBrothersWISP 62 – WiFi Broadcast Storms, Large BGP Tables, Unifi Automation



The two best looking brothers Greg and Mike chat about networkie type things.

This cast we talk about:
Google devices disrupting home wifi
Ubiquiti Unifi Dimmers
Mikrotik hAP ac2 – AC wave 2 gear
How many routes have you gotten on a CCR?
IPv6 again…
EDNS

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TheBrothersWISP 61 – Meltdown, IPv6, Favs Of 2017



Andrew Cox, Mike, and Greg(who has a cold{sorry}) talk about some of their favorite things from 2017.

This cast we talk about:
Meltdown/Spectre
IPv6 464XLAT
What do you want to see in 2018?
What is your favorite piece of gear of 2017?
Deals with other ISPs to sell their service?
Playlist of interesting WISP-related YouTube videos
hap ac lite
hap lite
vive vr
new crs
horn antennas

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Scriptlet: Bulk VPN connections on MikroTik with connection rate limiting

During my day job we use some MikroTik CHR deployments for (among other things) VPN session termination. The CHR’s are easy to spin up, offer a wide variety of VPN types, and for low traffic sessions can support upwards of 10,000 sessions on a single device.

It’s over 9000!

In the event of an outage though, you would run into a problem – those 10,000 sessions all want to re-establish at once.. and the CPU on the MikroTik quickly bottlenecks until it becomes unable to cope and begins to drop connections quickly becoming a vicious cycle.

We initially dealt with this by defining a hard limit on the number of new sessions per second, using 2 simple firewall rules and the connection limit classifier to keep these under 10 per second – however this meant that after an outage it would take at absolute minimum, over 15 minutes for all the sessions to come back online! So we came up with a better solution. Continue reading Scriptlet: Bulk VPN connections on MikroTik with connection rate limiting