Category Archives: EIGRP

EIGRP

EIGRP: Bandwidth consumption adjustment

The default bandwidth usage percentage by EIGRP is 50%, you can adjust it by issuing ip bandwidth-percent eigrp command on router’s interface. 1841-1(config)#int se0/1/0.102 1841-1(config-subif)#ip bandwidth-percent eigrp 25 80 Here I adjusted the bandwidth percentage from default 50% to 80%. … Continue reading

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Non-broadcast multi-access network

Hub and spoke connectivity over frame relay (NBMA)   1. Multipoint NBMA allows one subnet to be used by hub and spoke routers. 2. In contrast to multipoint, point to point link is a subnet hence consumes more IP subnets. … Continue reading

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EIGRP: Unequal cost load balancing

1. Use the variance command. 2. Default variance is 1. 3. Do determine the variance value use the command show ip eigrp topology. Example: 3825-1#sh ip eigrp topo IP-EIGRP Topology Table for AS(90)/ID(192.168.10.1) Codes: P – Passive, A – Active, … Continue reading

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EIGRP Metric

Metric formula It is not necessary to know, but it is a good idea for me to understand how the EIGRP metric is derived. Total outgoing minimum bandwidth = (K1 * bandwidth) + (K2 * bandwidth) Where K1 = bandwidth … Continue reading

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Route Filtering: EIGRP and RIP mixed protocol lab 1.2

Objective: Configure a route filter at A that will only allow subnets 172.16.2.0/24, 172.16.8.0/24 and 172.16.9.0/24 to be advertised into RIP domain. D#sh ip route rip 172.16.0.0/24 is subnetted, 13 subnets R       172.16.253.0/24 is possibly down, routing via 172.16.252.1, FastEthernet0/0 … Continue reading

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Route filtering: EIGRP and RIP mixed protocol lab.

Objective: Configure a route filter at A (R1) that will prevent D (R4) from learning about subnet 172.16.10.0/24 D#sh ip route 172.16.0.0/24 is subnetted, 14 subnets C       172.16.252.0 is directly connected, FastEthernet0/0 R       172.16.253.0 [120/1] via 172.16.252.1, 00:00:13, FastEthernet0/0 R       … Continue reading

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EIGRP (NBMA): Summarization, bandwidth utilization and authentication Part 3

Additional objective has been added last minute. For security your boss requires you to enable authentication among EIGRP routers, the keys should be changed at these timing and date: 1. first key phrase: cisco123 Accept from 16 September 2010 10pm … Continue reading

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