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ccna hindi book pdf.The Hold time of IPv4 EIGRP can be modified under the interface by the command ip hold-time eigrp as-numberChapter 16 EIGRP .281 .seconds to modify it. The Hold time is not automatically adjusted after the Hello interval is modified and needs to be configured manually. Between neighbors Hello interval andThe difference in Hold time does not affect the establishment of the IPv4 EIGRP neighbor relationship, unlike OSPF. Hold time expiration or update retransmission 16 will cause IPv4 EIGRP to reset the neighbor relationship.. [Technical points].Possible reasons why a router running the EIGRP routing protocol cannot establish an EIGRP neighbor relationship: The AS numbers of EIGRP processes have different K values for calculating metric values. you can modify the K values by using the command metricweights {tos kl k2 k3 k4 k5}. for exampleFor example, R1(config-router)#metric weights010100 EIGRP authentication fails.(4) View IPv4 EIGRP topology table information R2#showip eigrp topology View IPv4 EIGRP topology table information IP-EIGRP Topology Table for AS(1)/ID(2.2.2.2) // Topology table for EIGRP process 1 (ID 2.2.2.2) Codes :P -Passive, A -Active, U -Update,Q -Query, R -Reply, r-reply Status, s -sia Status P 172.16.34.0/30,2 successors, FD is 2681856 Because it is an equivalent path, there are 2 successor routers via 172.16.23.2 (2681856/2169856), Serial0/0/l via 172.16.24.2 (2681856/2169856), Serial0/l/0 P 172.16,24.0/30,1 successors, FD is 2169856 via Connected, SerialO/l/O P 172.16.23.0/30,1 successors, FD is 2169856 via Connected, Seri al 0/0/1 P 17231.1.0/24, 1 successors, FD is 2172416 via 17231.12.1 (2172416/28160),Serial0/0/0 P 172.31.0.0/16,1 successors, FD is 2169856 via Summary (2169856/0),NullOP 172.16.4.0/24,1 successors, FD is 2172416 via 172.16.24.2 (2172416/28160), SerialO/l/OP 172.16.0.0/16,1 successors, FD is 2169856 //EIGRP auto-summary route