Welcome to the Juniper Networks Introduction Series! If you’re like me, you’ve been networking for a while. Sooner or later, you will come across Juniper devices, and may find them to be quite different to what you’re used to. This series will build on the skill that you already have, to get you Juniper ready. It will also prepare you for the JNCIA-Junos exam, if that’s something that interests you. Each video is designed to be as short and to the point as possible. They are arranged into five categories; The Basics, Device Configuration, Architecture, Routing, and Monitoring/Troubleshooting. Each video comes with additional resources, including study notes, links for additional reading, labs, quizzes, and flashcards. #junipernetworks #networkdirection #networking #informationtechnology #junipernetworksintroduction
Curated by: Network Direction (21 videos)
Routers don’t have just one routing table. They have several. For example, they have the inet.0 routing table for unicast IPv4 routes, and inet6.0 for unicast IPv6 routes. We can even create our own routing tables. Inet.1 is used for the multicast forwarding cache, inet.2 is used for multicast reverse path forwarding, and of course, there are others. The routing table has all valid routes. The forwarding table only has the best routes. ECMP is not enabled by default, so if there are two or more best routes, only one will be placed in the forwarding table. Static routes are configured under the ‘routing-options’ hierarchy. Hidden routes are routes that are invalid. This might happen if a routing policy is rejecting routes that we’ve learned. Next-hop IP’s can be in a remote subnet, rather than a local one. If this happens, the router will look at the routing table to see how to get to the next hop. This is called next-hop resolution. Reverse Path Forwarding (RPF) uses the routing table to see if a packet came in on the correct interface. If not, it’s dropped. The point of this is to drop traffic that is coming from a forged source. Loose mode simply requires the source IP to have a valid route in the routing table. Strict mode looks at the interface in the routing table, as well as the IP. Study notes: https://networkdirection.net/study-notes/introduction-to-juniper/routing-table/ Transcript: https://networkdirection.net/study-notes/introduction-to-juniper-transcripts/routing-table Quizzes: https://networkdirection.net/labsandquizzes/quizzes/juniper-jncia/routing-tables Labs: https://networkdirection.net/labsandquizzes/labs/jncia-labs/routing-table Overview of this video: 0:00 Introduction 0:08 Routing Tables 2:54 Forwarding Tables 3:37 Static Routes 7:23 Reverse Path Forwarding Patreon information: https://networkdirection.net/patreon/ Further reading: Configuring Junos OS Routing Tables - https://www.juniper.net/documentation/en_US/junos/topics/concept/routing-tables-understanding.html Understanding Unicast RPF (Routers) - https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/interfaces-configuring-unicast-rpf.html LET'S CONNECT 🌏 https://www.youtube.com/c/networkdirection 🌏 https://twitter.com/NetwrkDirection 🌏 https://www.patreon.com/NetworkDirection 🌏 https://www.networkdirection.net #NetworkDirection #networking #Juniper