EIGRP summarization Summarization can be employed on any router in an EIGRP network, since it is a distance-vector protocol and does not keep a LSDB on all routers on the network. Summary routes in EIGRP have an AD value of 5. The summary router will advertise the summary route with an outgoing interface of Null0… read more »
OSPF Basic OSPF supports adjacency authentication to protect control plane E.g. prevent against routing injection attack Every OSPF packet header includes authentication information I.e. Hello, LSU, LSR, etc. Authentication does not mean encryption OSPFv2 payload is still clear text OSPFv3 supports IPsec encryption Types of authentication (3) Type 0 – Null Type 1 – Simple… read more »
Policy based routing (PBR) is a mechanism by which we can route traffic in a manner other than that based on its destination. PBR allows forwarding decision to be based on source, destination, protocol type (FTP, HTTP, etc. ) or incoming interface. How does it work? Traffic criteria defined by a route-map match Permit means… read more »
A static route is a manually configured route and will have a default administrative distance of 1.
Packet routing involves three main steps
router learns a particular route from multiple sources it can not use the metrics since they all use different units. This is where the administrative distance (AD) comes in. The protocol with the lower AD is chosen and that route installed in the RIB.