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Feb 25 / thebrotherswisp

Greg Talks 6 – Pick Back Up, Commit Based Systems, When You Think



Greg talks to Nick B today, and man do we go down some rabbit holes.

This week we talk about:
I’ve got a handful of friends that I can just pickup wherever like we never skipped a beat LOL
Adding a policer to IOS-XR is so nice. The policy map configures in bps, kbps, mbps, or gbps.
your successes aren’t just yours. they are comprised of everyone that has helped you, so ignore the haters.
I write presentations in my head during cycle class.

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Feb 18 / Greg

Fire Panel Dialer to Grandstream HT818 ATA

I found myself in quite a pickle recently as a client needed a fire alarm dialer hooked up post haste for an inspection. I figured, “no problems, ire mon, bobsled.” Two and a half hours later it was working…perhaps it was more difficult than I thought. Here’s my config to get it working.

All of these configurations are done under the profile menu.

First is the DTMF method:

Priority 1 needs to be set to in-audio. This will take the DTMF tones and just shove them into the audio stream.
Disable DTMF Negotiate should be set to Yes so that it will grab in-audio and go with it.

Next is setting the codec to be used; Grandstream calls it vocoder:

Set “use first matching” to yes so it will use the supplied list.
Then set them all to PCMU which uses G.711U. Since this is the least compressed codec it is best for DTMF dialers.
I also set voice frames per tx to 10. It should be in a range of 2 – 10, and 10 seemed to work well.

Last is disabling echo cancellation:

First the dialer is a good distance from my ATA so I set the gain to -6 and Rx to -4.
Now disable both the Line echo canceller and the network echo suppressor.

After making these modifications and sacrificing two chickens everything started working. Good luck errbody!

Feb 16 / thebrotherswisp

The Brothers WISP 106 – COD Network Killer, Baicells CBRS, ROS VXLAN



This week Greg and Tomas try and avoid being ambushed by his cat…which you can regularly hear barreling across his desk LOL

This week we talk about:
COD keeps slaughtering networks.
Baicells CBRS not supported by Gen1 CPEs; early adopters are not best pleased.
Miller found a CLI verson of speedtest.net
Mike Knittel says if chrome 80 is bricked on some stuff, try downloading the self signed cert and loading it into your store.
What do you do for emergency copper splices? Greg does it dirty.
Greg recertifies his CCNP, cause he’s a responsible adult.
Greg moving back to esxi from proxmox for my lab…*sigh*
Mikrotik ROS 7.0beta5 – VXLAN support, VRRP connection tracking data replication
A google search for Mikrotik Chateau shows a new home router design on some vendor sites. Looks to be V7 only.
Unifi USW flex mini 5 port managed switch for $29
Unimus 2.0.0-Beta1

Here’s the video:(if you don’t see it, hit refresh)

Feb 10 / Greg

Simple Interface Policing In IOS-XR (ASR9000)

First I’ll create a simple policy that will match on 2gbps. The policy map in IOS-XR is a dream, it lets you specify speed in bps, kbps, mbps, or gbps…stupid simple.

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policy-map 2gig
 class class-default
  police rate 2 gbps
   conform-action transmit
   exceed-action drop
  !
 !
 end-policy-map

So class “class-default” is a built in class that basically says “match all”.
Conform action is transmit, so as long as they are within 2Gbps all it through.
Exceed action says everything else, drop.

Now apply the limit to my interface:

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interface TenGigE0/1/0/11
 description [Customer 1]
 service-policy input 2gig
 service-policy output 2gig

Good luck and happy rate-limiting.

Feb 8 / thebrotherswisp

Greg Talks 5 – CCNP Recertification, Fighting with Linux, Red Herrings



Greg talks to James about the things.

This week we talk about:
RFC2544 test using me3400e as a loopback device(“Ethernet loopback”).
Plan to recertify my CCNP before end of February so I don’t have to deal with the new material.
The netflix show The Circle made me die inside a bit
I knew it, but I forgot…Route-policies are mandatory for eBGP peers in IOS-XR
Zayo had a cut in Austin, which resulted in packet loss in Houston…somebody is way oversubscribed on their redundant links…
I would trade years to eat anything i wanted and stay body healthy
almost a year after kidney stone and I still haven’t fully recovered…sigh
we have texas flags everywhere…everyone that fanatical?
It always feels like everything in Linux puts up a fight compared to Windows
What are interesting scenarios you can fulfill using ansible with MTK?
I can’t make myself care about football…eh.
HSRP/VRRP preemption only needs to be configured on the higher priority peer.
GLBP uses active virtual gateway to respond to arp requests supplying macs of differing gateways.
TuffToe to fix PB shoes
Cisco portfast is enabled auto when voice vlan added, but not removed when vv removed
Native vlan on a Cisco trunk port will strip the vlan tag on that link for the native vlan.
Red herrings during change windows
Cisco switch CDP/STP/remote admin stop, but is still passing traffic…YIKES.
My knees have been feeling loose lately…sleeves have been helping
thoughts on the rectification process…the pat down

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Feb 2 / thebrotherswisp

The Brothers WISP 105 – MUM Presentations, RFC2544 Testing, Starlink Latency



This week Greg,Tomas, and Tommy C. catch up about our favorite color of skittles.

This week we talk about:
My sources inform me that most of the MUM EU 2019 announced products will be released till MUM EU 2020, in worst case (china virus) MUM US 2020
All CRS3XX switches have same switching ASICs. They simply added the MIPSBE CPU since it was their most common to run ROS.
MUM US coming up; TBW will have a panel again.
Zach was asking how to determine how long a BGP route has been cached in a Cisco router – “show bgp x.x.x.x” in IOSXR.
BGP lab back up. CCR to ASR9K pulls 780K routes in about 20 seconds.
RFC2544 testing with an AGILENT DELL FRAMESCOPE PRO
Nick B does packet pushers – segment routing
To fuse each DC device or not – the BlueSea fuse block makes it cheap and easy to do so. Thanks for the tip Ryan McAfee.
Simon Green – how to make a mikrotik bridge invisible. Turn off STP and Neighbor discovery…how invisible do you want it?
Powering PoE and direct power MTK kit – use different voltages for each.
Unimus 2.0.0-Beta1 next week
SpaceX Starlink updates (ground station forwarding still faster than land-based fiber)

Here’s the video:(if you don’t see it, hit refresh)

Jan 27 / thebrotherswisp

Greg Talks 4 – Feedback, wAP LTE + Ting, Ansible Energy



Greg talks to the camera about the things.

This week we talk about:
Why is getting feedback so difficult…is it that people want to be nice…is silence bad in these scenarios?
How do you remember your accomplishments…my memory sucks.
IOS-XR allows for duplicate configuration on multiple ports…easy migration bro!
A fresh set of eyes can make all of the difference…especially at 4AM
Late night change windows are getting harder and harder on me
WAP LTE with Ting is just too easy
I just picked up a grandstream ht818…going to see how difficult it is to configure.
Cram session at the end, but I finished my LinkedIn courses
I built my sound booth with 2 sheets OSB, a few 1x1s, industrial carpet, and a few sound tiles…also an old matress LOL
I do daily smtp test emails on windows machines using blat and scheduled tasks(autoit also makes it easier)
Sup7203bxl from 770K routes to 114 LOL. The box has never been happier.
Well hello there ansible; working with modules, the importance of spacing in yaml
Suck it outlook login, I’ve got Autoit
Ansible prompts with set_facts
Asnible support for older switches requires older modules
Ansible doesn’t natively support a lot of special features in defined modules – requires config module.

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Here’s the video:(if you don’t see it, hit refresh)