I was recently watching BRKDCT-2333 - Data Center Network Failure Detection and, after going through the usual suspects - L1 (carrier loss, link signaling), L2 (LACP, UDLD, CFM/Link-OAM), L3 (protocol keepalives, BFD) - the presenter talks about BFD over EtherChannel. But not only for node protection (see below), but for link protection as well, running micro-BFD sessions on each individual EtherChannel member. After understanding how it is done, I started wondering what's the point (tangible benefit) of using this feature?

20170201 | net | #design #routing #cisco


In the past couple of years I've had quite a bit of exposure to customers with large WANs in various industries (many non-IT centric) - with xDSL and DMVPN/FlexVPN playing a big role alongside simpler things like fibre based L3VPN and Internet access. I'm going to stay away from SD-anything because they are often vague marketing loaded terms, but that doesn't stop me from asking: what would an improved WAN offering look like? By improved I mean that it solves some of the challenges we're facing today (technical, user experience, cost, deployment etc.) or makes a big impact on customer experience.

20161102 | net | #wan #design