Striving to reach that last 9? Looking for a way to increase your uptime while still being able to do maintenance on your network? Wish you could shutdown your OSPF neighbors like your BGP peers? Ok, enough sales talk. Achieving HA uptimes when you need to do maintenance is far from simple, even if you […]
HSRP, VRRPd, and GLBP Compared
In the world of first hop redundancy, we have plenty of choices. In order to make the right decision for your network you should know the basics regarding all three. The following chart provides a quick breakdown of each protocol. HSRP VRRPd GLBP Standard RFC2281 RFC3768 none Load Balancing No No Yes OSI Layer-3 Layer-3 […]
Bidirectional Forwarding Detection
Bidirectional Forwarding Detection (BFD) is a UDP-based protocol that provides fast (very fast!) routing protocol independent detection of layer-3 next hop failures. BFD can be used to replace the routing protocol timers with a fast and reliable failure detection mechanism. BFD also provides low-overhead detection of faults even on interfaces that don’t support failure detection […]
