Install Aten UC232A driver El Capitan and Sierra
How to configure Mikrotik L2TP Server over IPSec
How to configure SPAN and RSPAN in Cisco Catalyst switches
Switched Port Analyzer (SPAN) allows you to send a copy of traffic passing through ports to another port on the switch. SPAN is important to mirror received or transmitted (or both) traffic on one or more source ports to a destination port for analysis. While SPAN is mirroring ports in the same switch, RSPAN(Remote SPAN) is mirroring ports in one switch to a port in different switch.
How to do source-based IP Routing in Linux
Our company has two upstreams for internet access. Assume that the upstreams are ISP1 and ISP2. The router is using Linux running BGP (Quagga) for dynamic routing between the two upstreams. See the image below for the sample of source-based IP routing topology.
BGP Next-Hop Inaccessible
One of our customers complained that they did not receive several prefixes from our router / their BGP peer, but they received the prefixes from others (ISP). I had to go to check this routing table in our router.