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eigrp

IPv6 Routing

1. Enable IPv6 Routing To enable IPv6 routing, use: R(config)# ipv6 unicast-routing This will enable the router to send RAs unsolicited or in response to RS messages. 2. Static Routing ! Directly attached static routes: R(config)# ipv6 route IPV6-PREFIX/IPV6-PREFIX-LEN OUT-INTERFACE [AD] ! Recursive routes: R(config)# ipv6 route IPV6-PREFIX/IPV6-PREFIX-LEN IPV6-NEXT-HOP [AD] …

Routing over Frame Relay

1. Topologies 1.1 Full Mesh The simplest Frame Relay topology is the Full Mesh topology, where each router has a dedicated virtual circuit to another router. Unfortunately this design is rarely found in real life because each additional circuit costs. Of course, having so many circuits available makes it easy …

MPLS 101

1. Labels MPLS (Multi Protocol Label Switching) adds a 4 Byte header between the Layer 2 and Layer 3 header for each label. The header has 4 fields: 20 bits – Label – locally significant on the link (similar to Frame Relay DLCI) 3 bits – EXP – used for …

More EIGRP Features

1. Router ID The router ID is a 32 bit number, usually represented as a dotted decimal (like an IP address). The Router ID is determined when the routing process is started by the following algorithm: Use the configured value R(config-router)# eigrp router-id ROUTER-ID Use the highest up/up loopback ip …

EIGRP Metric

[pmath size=12]K5!=0, doubleright Metric_EIGRP = [(K1B+K2B/{256-L}+K3D)*{K5/{R+K4}}]*256[/pmath] [pmath size=12]K5=0, doubleright Metric_EIGRP = (K1B+K2B/{256-L}+K3D)*256[/pmath] you will have to round down to the nearest integer default K valus: (K1,K2,K3,K4,K5) = (1,0,1,0,0) default EIGRP metric: B+D remember it as BuiLDeR 20 The EIGRP metric is 256 times larger than IGRP metric. 1. Metric Components …

EIGRP 101

1. Starting the routing process R(config)# router eigrp AS-NUMBER ! AS Number mast match between neighbors R(config-router)# network NETWORK-ADDR [WILDCARD] !If no wildcard is specified, the network is considered classful EIGRP will advertise routes learned by the EIGRP process and all routes that appear directly connected on the interfaces that …

GRE Tunnels

1. Configuring GRE GRE tunnels appear as directly connected logical interfaces to the router even though the traffic that goes into the tunnel will actually be carried over other physical interfaces to the destination. To configure a GRE tunnel you have to set the source and the destination of the …