Yearly Archive: 2015
EIGRP NAME MODE
(config)#router eigrp ( name ) the following command to configure a unicast IPv4 address family that uses an AS (config-router)#address-family ipv4 unicast autonomous-system ( as ) the following commands to configure the IPv4 address family to advertise the network (config-router-af)#network …
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DMVPN Quicky !
Phase 1 With phase 1 we use NHRP so that spokes can register themselves with the hub. The hub is the only router that is using a multipoint GRE interface, all spokes will be using regular point-to-point GRE tunnel interfaces. This…
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DMVPN and IPSEC
IPSec can provide four important services: Confidentiality, data integrity, authentication, and anti-replay protection. Each service can be described in the following ways: • Confidentiality is attained through packet encryption, which prevents packets from being read if they are intercepted. •…
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DMVPN PHASE 1 2 and 3
The primary difference between DMVPN Phase I and DMVPN Phase II is that, in DMVPN Phase II, spoke routers are able to create dynamic tunnels with other spoke routers, whereas in DMVPN Phase I, they are not. The primary benefit…
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Dynamic Multipoint Virtual Private Network “DMVPN” Basics
DMVPN uses NHRP to dynamically learn the NBMA address of other routers that are a part of the same network. NHRP is a client-server protocol. The DMVPN hub acts as the NHRP server, and the spokes are NHRP clients. Only…
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Route Summarization and Passive Interface
EIGRP The summarisation command is done on the interface you can summarise or prevent some route to be advertise with summarisation . (config-if)#ip summary-address eigrp # ( summary address ) ether all network or the one you want to advertise…
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EIGRP Equal / Unequal Cost Balancing
To make equal cost balancing we need minimum 2 routes by looking at the topology metric : show ip eigrp topology ( network address and mask ) or show interface ( interface ) Then you can match the metric parameters…
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EIGRP Path Selection
Reminder : For a path to become an Feasible Successor the FD must be less or equal then the AD x Variance ( 1 by default ) Commands usefull for understanding and managing Path Selection Show ip route Show ip…
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ISDN Basic Configuration
Configure the Bri interfaces on each routers R1(config)#interface bri 0 R1(config-if)#no ip address R1(config-if)#isdn switch-type basic-ni R1(config-if)#isdn spid1 100000001000100 R1(config-if)#isdn spid2 100000001100100 R1(config-if)#dialer pool-authorise-user 1 R1(config-if)#encapsulation “ppp” or R1(config-if)#ppp authentication chap R2(config)#interface bri 0 R2(config-if)#no ip address R2(config-if)#isdn switch-type basic-ni R2(config-if)#isdn…
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