What is PDM Eigrp?

Protocol-dependent modules (PDMs) are used by the routing protocol EIGRP to make decisions about adding routes learned from other sources; for example other routers or routing protocols to the routing table. … The PDM is also capable of carrying information from the routing table to the topology table.

What is the purpose of the EIGRP PDM?

PDM is the mechanism EIGRP uses to ensure the availability of neighboring routers. C. PDM is the algorithm engine used by EIGRP to create routing tables.

What are the four basic components of EIGRP?

  • Neighbor Discovery/Recovery.
  • Reliable Transport Protocol.
  • DUAL Finite State Machine.
  • Protocol Dependent Modules.


EIGRP is not explicitly listed in the latest 200-301 version of the CCNA exam topics (whereas OSPF is) but you can still be tested on it in the exam. EIGRP (Enhanced Interior Gateway Routing Protocol) is an advanced distance vector routing protocol. … Neighbor table – stores information about EIGRP neighbors.

Why is OSPF better than EIGRP?

The scalability of the OSPF is higher than EIGRP because EIGRP is complicated and vendor-specific and incapable of migrating from one vendor to the other. Conversely, OSPF is an open standard and simple protocol through which the network can be scaled easily.

Where is EIGRP used?

EIGRP is used on a router to share routes with other routers within the same autonomous system. Unlike other well known routing protocols, such as RIP, EIGRP only sends incremental updates, reducing the workload on the router and the amount of data that needs to be transmitted.

What are three features of EIGRP?

  • Hybrid routing protocol (distance vector that has link-state protocol characteristics).
  • Uses IP protocol 88.
  • Classless protocol (supports VLSMs).
  • Default composite metric uses bandwidth and delay.
  • You can factor load and reliability into the metric.

What is EIGRP cost?

The formula used for cost calculation is: EIGRP Metric = 256*((K1*Bandwidth) + (K2*Bandwidth)/(256-Load) + K3*Delay)*(K5/(Reliability + K4))) As values of K1 and K3 are set to 1, and K2, K4 and K5 are set to 0. Therefore the formula becomes: Metric = 256*( Bandwidth +Sum of all Delay)

What is true EIGRP?

Explanation: EIGRP stands for Enhanced Interior Gateway Routing Protocol is a routing protocol designed by Cisco. It is available only on Cisco routers. Explanation: EIGRP metric is K-values which are integers from 0 to 128. They are used to calculate the overall EIGRP cost with bandwidth and delay metrics.

What are the EIGRP K values?

K Value Component Description
K1 Bandwidth Lowest bandwidth of route
K2 Load Worst load on route based on packet rate
K3 Delay Cumulative interface delay of route
K4 Reliability Worst reliability of route based on keep alive

What is FD in EIGRP?

The Feasible Distance (FD) is the distance from the current router to the destination router. Feasibility Condition (Requirement) Within EIGRP there is requirement which must be met for a route to be considered feasible and loop-free.

Is EIGRP removed from CCNA?

Removed topics The following topics have been removed from the CCNA curriculum: Network fundamentals – OSI model. LAN Switching – Frame, VTP, Switch stack. Routing – EIGRP, RIPv2, OSPFv3, Inter-VLAN routing.

What is the role of process ID in EIGRP?

The process-ID, in EIGRP is a numeric value between 1 and 65536. And it identifies the EIGRP process as 1. This means that we can have several instances of EIGRP running on a router, however, communication will only work when the process_ID is the same in the routing domain.

Which is faster EIGRP or OSPF?

The network convergence time is faster than OSPF networks, because EIGRP network can learn the topology information and updates more rapidly. … As a result, data packets in EIGRP network reach faster to the destination compared to OSPF network. The packet loss in the EIGRP network is less than in OSPF network.

What is an advantage of using EIGRP?

Benefits of EIGRP It makes use of link more effectively through (ECMP) Equal-Cost Multi-Path and unequal cost load sharing. It performs a much easier transition with a multi-address family. It supports both IPV4 and IPV6 networks. It provides encryption for security and can be used with iBGP for WAN routing.

What is OSPF vs EIGRP?

Key Differences Between EIGRP and OSPF. EIGRP is an advanced distance vector routing protocol which uses incremental and triggered updates. … On the other hand, OSPF is a link-state routing protocol which resembles a map where the complete information about all the routes within that area is maintained.

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