#NETSIMK WITH EIGRP UPDATE#
#NETSIMK WITH EIGRP CODE#

A wildcard mask is an optional parameter that can be used to include only specific interfaces. The network is the classful network address of the directly connected interfaces on the router. The network command is similar to that used with RIP. The autonomous-system value is actually a process-id and must be the same on all routers in the EIGRP routing domain. The reported distance is simply an EIGRP neighbor's feasible distance to the destination network.ĮIGRP is configured with the router eigrp autonomous-system command. The feasibility condition (FC) is met when a neighbor's reported distance (RD) to a network is less than the local router's feasible distance to the same destination network. A feasible successor (FS) is a neighbor who has a loop-free backup path to the same network as the successor, and also meets the feasibility condition. Feasible distance (FD) is the lowest calculated metric to reach the destination network through the successor. The successor is a neighboring router that is used to forward the packet using the least-cost route to the destination network. The DUAL finite state machine is used to determine best path and potential backup paths to every destination network.

#NETSIMK WITH EIGRP UPDATE#

The default calculation is the slowest bandwidth plus the sum of the delays of the outgoing interfaces from the router to the destination network.Īt the center of EIGRP is DUAL (Diffusing Update Algorithm). By default only bandwidth and delay are used. EIGRP composite metric uses bandwidth, delay, reliability and load to determine best path. EIGRP sends partial or bounded updates, which includes only the route changes and only to those routers that are affected by the change. The show ip eigrp neighbors command is used to view the neighbor table and verify that EIGRP has established an adjacency with its neighbors.ĮIGRP does not send periodic updates like RIP. The hello and hold-down values do not need to match for two routers to become neighbors. The hold time is three times the hello, or 15 seconds on most networks and 180 seconds on low speed NBMA networks. On multipoint nonbroadcast multiaccess networks (NBMA) such as X.25, Frame Relay, and ATM interface with access links of T1 (1.544 Mbps) or slower, Hellos are sent every 60 seconds.

On most networks EIGRP sends hello packets every 5 seconds. Reliable RTP means an EIGRP acknowledgment must be returned.īefore any EIGRP updates are sent, a router must first discover their neighbors. EIGRP uses reliable delivery for EIGRP updates, queries and replies and uses unreliable delivery for EIGRP hellos and acknowledgments. EIGRP uses RTP (Reliable Transport Protocol) as the Transport layer protocol for the delivery of EIGRP packets. EIGRP has a default administrative distance of 90 for internal routes and 170 for routes imported from an external source, such as default routes.ĮIGRP used PDMs (Protocol Dependent Modules) giving it the capability to support different Layer 3 protocols including IP, IPX and AppleTalk.

#NETSIMK WITH EIGRP CODE#

EIGRP uses the source code of «D» for DUAL in the routing table. IGRP is a classful, distance vector routing protocol which is no longer supported by Cisco. EIGRP is a Cisco proprietary routing protocol and an enhancement of another Cisco propriety protocol IGRP (Interior Gateway Routing Protocol).

Netsimk with eigrp