cisco Cisco Trunk-splosion Protection On IOS switches with EEM, protect yourself (and less careful Jr engineers) with this applet that will prevent allowed-vlan-mishaps on trunks!
linux FileCloud Sync Client on Linux Getting the FileCloud Sync Linux client working and accessible can be a bit cumbersome; this is an installation script for the Linux FileCloud sync client.
jinja2 Jinja2 Switch Templating with FreeZTP This is a sanitized example of a switch template that I built out with a strong focus on keeping the process as simple and unbreakable as possible for the intended end-users.
cisco Cisco EEM: Auto Interface Descriptions These applets will automatically update the description of an interface where a new CDP neighbor is detected, if not already described accordingly.
cisco Cisco Smart Install - IOS-XE Stack Auto-Allocation When this snippet is added to a Jinja2 template it will automatically build out an EEM applet that will set switch priorities and renumber all switches in the stack.
cisco Cisco Smart Install - IOS-XE Upgrade Caveat IOS-XE 3.7.4 cannot upgrade to 16.3.6 via smart-install because *new force* isn't appended. This workaround uses EEM applets in the FreeZTP J2 switch template to download install the updated image.
cisco AnyConnect VPN with(out) DUO 2FA A user's status can be set as 'Bypass' in the Duo Admin Panel (to bypass 2FA), but as an exercise we can also use Duo's Auth Proxy along side a separate authentication server in an environment with Duo 2FA users and non-2FA users.
pi-hole Pi-hole: Local DNS, Public DOH Using Pi-hole and Cloudflare’s new 1.1.1.1 and 1.0.0.1 public DNS servers together is a good idea… bolting DoH (DNS over HTTPS) onto that via the Cloudflared daemon is an even better idea (until Pi-hole natively supports DoH anyways).
securecrt SecureCRT: Session Logging Session logging can prove extremely useful when recollecting events during troubleshooting scenarios or even configuration-binges. SecureCRT’s logging settings allow the use of variables to define the filename/path.
cisco NX-OS Default Interface from Enable Mode Considering the 9000v is really only for labbing this isn’t a huge deal, but I was able but to default an interface from enable mode; config mode is not required.
cisco NX-OS Dynamic Routing over vPC VLAN Configure EIGRP on the N9K platform to establish dynamic routing adjacencies and achieve ECMP on a vPC VLAN.
opinion Network Engineering, Musical Chairs I hear this *rule* regarding changing jobs frequently as a Network Engineer, focused primarily on maximizing income potential; I'm thinking there has to be exceptions to this.
securecrt SecureCRT: Flow Control Paste To help prevent overwhelming network devices while pasting in large configuration files, user miked provided a script that you can use in SecureCRT on the Van Dyke forums.
cisco Fix: Cisco MARS Upgrade from Recovery Recently I received an RMA replacement for a CS-MARS-20 unit that had a failing drive. After restoring the backup from version 6.1.5 everything was back to normal, but we needed to get onto the latest version (6.1.8).
