This week Greg, Mike, and Dave do the first cast of the new year…time to start out on the wrong foot 😉
This cast we talk about: UBNT vs. Cambium Lawsuit Update Centurylink outage
Mikrotik NAT (as it pertains to SIP and RTP) Broken
Greg fav things: hAP AC^2, pickleball, your mom’s house podcast/Harmontown podcast, little brothers wisp slack
Mike’s Fav things
Daves My son, Ham Radio
completely useless phrases that sound inspirational
Mikrotik bug fix for CRS3
Hammett would look amazing with a mow-hawk
PoE power cycle ping
*Slack Updates*
In Mikrotik, flush connection table when troubleshooting and making changes
This week Greg and Tommy C(TCent to his fam) talk about their top 5 tips.
The Tips:
Tommy C
1. Have a test bench: I read somewhere “everyone has a test network, not everyone has a production network” I have been able to pull off so many changes/upgrades to our network just because I was able to show how the system would work before implementing it. I also have a couple friends who my company serves. They know they are on testing equipment and enjoy buying me beers when I come over to try out “some new hardware”. We are now setting up a test tower that will just be
2. Radios + antennas are just like old flashlights: Remember those old Mag Lights and the light pattern they would make? Dish antennas are the exact same way. If you think you have a good alignment, keep moving the antenna another 20 degrees and see what happens.
3. Don’t break EIRP: It’s not worth it, get a bigger antenna or fail the customer. Noise only goes up and you can only make so much more noise. (Which everyone else has to hear) Set a minimum signal level and stick to it, be willing to fail a new Install if you can’t get a good signal. You will thank yourself when you are able to get more customers on an AP and push more bandwidth to existing customers. (Far fewer phone calls as well.)
4. Wireless is not “Set and forget”, Have some sort of monitoring as well as record keeping for signal levels and bandwidth. Call people if they have a rapid drop in signal or their signal has dropped a lot over several months. People will pay more money for longer if you are the one telling them “your internet sux, we want to fix it”.
5. If you climb towers, have a good safety guy give you classes, if you have employees make them take safety classes and enforce safety policies. If someone routinely breaks safety rules get rid of them, eventually they will cost you a lot of money. Someone called OSHA to report a bunch of false safety violations against us while we were putting up a tower in a competitors area. Because we had our safety guy on site while we were setting up the tower OSHA decided we were not the ones making trouble.
Greg
Keep a spare on the shelf Keep a spare of everything you have. Great for emergencies as well as labbing scenarios.
Keep backups This will save your life one day.
Diagram current and future builds This is for you and every engineer/consultant you employ.
Don’t be affraid to ask for help Being on an island is lonely, especially when you don’t have a volley ball.
Don’t be affraid to help others Your knowledge is a gift that should be given, not horded away like the one ring.
*Slack Updates*
Jeff – Huawei US distribution raised prices and documentation is behind paywall.
Discussion of running fiber along with copper in MDUs
10Gb to the desk for standard office users
Mikrotik btest results and observations
Invalid packets – runts(smaller than 64 bytes), packets not in connection table, session closes and packets show up
Tomas – modern version of ROS do MSS adjustment directly in the PPP driver to allow a packet to stay in the fast path
CCR terminating a couple thousand PPPoE clients choking when 20-30 drop and reestablish at once
Packetloss on dispirate switched network connected by Mikrotik EoIP tunnel
Mike is looking for a whitebox switch that can take a massive amount of ACLs
What do you use for T1s – Greg uses Cisco 2621s with a T1 card(about $30 total)
Tunnels from a Mikrotik exit the “Output” chain, thus routing marks must be made in the output chain, not prerouting
This cast we talk about:
IPv6 follow-up: enable ipv6 in MTK, then issue “/system default-configuration print” to see default ipv6 firewall rules Steve’s IPv4/IPv6 Network Aggregator Cambium is going to sell outdoor cat5 Greg’s USB boost converter 5V to 24V for PoE
RB4011\RB1100AHx4 BGP? Highlights from Mikrotik slack:
Check CPUs in system resources cpu to see utilizaton on all cores.
Jeremy says to check if scripts are still running head to system scripts jobs.
Ole says 1036 takes 45 seconds to reboot and start passing traffic.
Thrift says Tilera MDE (Multicore Development Environment) only supports up to the 3.3 kernel, so they are stuck there moving forward.
Jason Wilson shared that the Russian MUM has opened up an iPhone app.
Dan discovered that once customers connected to a remote network with the Cisco anyconnect client they pulled a new DNS server and it caused issues. VoIP Phone IPSec
Tomas’ Thoughts: At what point does having services separated out bring benifit vs the all-in-one solution?
Nick, John, Miller, Tommy, Mike, and Greg talk about the various reasons to do IPv6 or not, some of the hurdles to implement, and use cases.
We also discuss:
Business case for IPv6
Islands of knowledge
Consumer vs Enterprise
Dual stacking
P2P addressing
Subnet sizes
Subnet sizes to deliver to customers
Prefix delegation via DHCP
AAAA and IPv6 DNS
Hotspots and IPv6
SLAAC
Various address types
Neighbor tables
ICMP in IPv6
This week Greg, Dave, Mike, Miller and Andrew Cox totally bro out and talk about manly things…and at the end Greg feels all the feels, so use caution if that’s not your thing 😉
This cast we talk about: Dragonwav’s annoucement
Bare minimum to protect your Mikrotik
Greg Trains on Ciena Metro E Kit Ciena 3930 Ciena 8700
Monitoring customers with overlapping subnets?
Working with unresponsive customers
