Networking

Introduction “Layer 2 Spine-Leaf” is a great architecture for most small data centers. If the data center only has a few racks of equipment, it’s often unnecessary to build a more complex design. In its most basic deployment, all gateways are SVIs (VLAN interfaces) on the spines. Multi-tenancy can be achieved by using VRF-lite and putting a firewall in to stitch the VRFs together. This is part of a series of building data center fabrics with different network operating systems.

Import Dell Enterprise SONiC into Eve-NG for labbing.

Decrypt PGP encrypted ISE backup.

Here are some commands I continually find myself searcing for, all in one place.

Tailscale & IOx

I absolutely love using tailscale. It uses a great new protocol, wireguard, but makes it easy to configure and use. I’ve used it as a VPN service for over a year now, but have always wanted to connected to devices that are not tailscale capable.

On new ISR routers with XE-SDWAN version 16.10.3+, you can only log in with the default password once. Over console, there is a message printed that warns you to change the password, but it can easily get lost in all the other console output.