Category: Networking
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Class Video – Intro to Networking
This is a CCNA style class that is vendor independent…ish…it’s really a free CCNA Training Video. I focus on Cisco and Mikrotik. The video is about an hour and 45 minutes. The slides are here -> This class was taught to a group of guys I am quite familiar with, so the style is pretty…
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Meraki Mesh APs
So I’m sitting here on the porch of our cabin in Leaky (pronounced lakey) Texas. This place is beautiful:fall leaves, quiet, Frio river. With all this beauty, the first thing I naturally do is to boot up my laptop and see if I can get wireless 😉 Indeed I can. The AP is a Meraki.…
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Cisco BGP Troubleshooting
Some times there is nothing better for trouble shooting that a nice process tree. Cisco has a great set of them here. My favorite is “Troubleshoot missing routes”: Always remember that when you check your filters that you are checking your prefix list AND your AS-path filters! Issue the “show ip bgp sum” command to…
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Mikrotik Changelog 4.2
You can find the log here. I’m just going to do this in one big lump comment: *) fixed problem – RB450G ethernet did not work if one of the ports was disabled; *) fixed ethernet of RB433 with switch chip IP175D; *) fixed route attribute problem; *) fixed route next-hops falling under multiple connected…
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Mikrotik 3.10 to 3.30 Bug
So I ran into a problem after installing a new Mikrotik back-haul. Reference the diagram below: I have a building that I’m serving wireless to, and I was doing the back-haul with some old Redlines…this all worked fine. Well, the Redlines eventually tanked on me, so I swapped them for some 411s. When I got…
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Mikrotik Newsletter 21
The PDF is found here. There are several interesting things listed in the most recent newsletter…as compared to the last…heh. The big news is that Router OS 4 is out of beta! This isn’t too surprising, since you had to use beta 4 to get 802.11N support. They are reminding you to update your bootloader…
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Cisco Policy Based Routing – Violate Route Table – Send Some Traffic One Way and Everything Else The Other
The idea in this scenario is as follows: You have two ISPs. You want all of your user’s web traffic to exit and enter ISP1 and everything else to exit and enter ISP2. You also need the ISP connections to backup each other in the case of a failure of either. Here’s our lovely diagram…