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642-902 ROUTE Exam Topics
Exam Description

The Implementing Cisco IP Routing (ROUTE 642-902) is a qualifying exam for the Cisco Certified Network Professional CCNP®, Cisco Certified Internetwork Professional CCIP®, and Cisco Certified Design Professional CCDP® certifications. The ROUTE 642-902 exam will certify that the successful candidate has the knowledge and skills necessary to use advanced IP addressing and routing in implementing scalable and secure Cisco ISR routers connected to LANs and WANs. The exam also covers configuration of secure routing solutions to support branch offices and mobile workers.

Exam Topics
The following information provides general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes the guidelines below may change at any time without notice.

Implement an EIGRP based solution, given a network design and a set of requirements


[li]Determine network resources needed for implementing EIGRP in a network[/li]
[li]Create an EIGRP implementation plan[/li]
[li]Create an EIGRP verification plan[/li]
[li]Configure EIGRP routing[/li]
[li]Verify an EIGRP solution was implemented properly using show and debug commands[/li]
[li]Document the verification results for an EIGRP implementation[/li][/list]


Implement a multi-area OSPF Network, given a network design and a set of requirements


[li]Determine network resources needed for implementing OSPF on a network[/li]
[li]Create an OSPF implementation plan[/li]
[li]Create an OSPF verification plan[/li]
[li]Configure OSPF routing[/li]
[li]Verify OSPF solution was implemented properly using show and debug commands[/li]
[li]Document the verification results for an OSPF implementation plan[/li][/list]


Implement an eBGP based solution, given a network design and a set of requirements

[li]Determine network resources needed for implementing eBGP on a network[/li]
[li]Create an eBGP implementation plan[/li]
[li]Create an eBGP verification plan[/li]
[li]Configure eBGP routing[/li]
[li]Verify eBGP solution was implemented properly using show and debug commands[/li]
[li]Document verification results for an eBGP implementation plan[/li][/list]


Implement an IPv6 based solution, given a network design and a set of requirements

[li]Determine network resources needed for implementing IPv6 on a network[/li]
[li]Create an IPv6 implementation plan[/li]
[li]Create an IPv6 verification plan[/li]
[li]Configure IPv6 routing[/li]
[li]Configure IPv6 interoperation with IPv4[/li]
[li]Verify IPv6 solution was implemented properly using show and debug commands[/li]
[li]Document verification results for an IPv6 implementation plan[/li][/list]


Implement an IPv4 or IPv6 based redistribution solution, given a network design and a set of requirements


[li]Create a redistribution implementation plan based upon the results from a redistribution analysis[/li]
[li]Create a redistribution verification plan[/li]
[li]Configure a redistribution solution[/li]
[li]Verify that a redistribution was implemented[/li]
[li]Document results of a redistribution implementation and verification plan[/li]
[li]Identify the differences between implementing an IPv4 and IPv6 redistribution solution[/li][/list]


Implement Layer 3 Path Control Solution


[li]Create a Layer 3 path control implementation plan based upon the results of the redistribution analysis[/li]
[li]Create a Layer 3 path control verification plan[/li]
[li]Configure Layer 3 path control[/li]
[li]Verify that a Layer 3 path control was implemented[/li]
[li]Document results of a Layer 3 path control implementation and verification plan[/li]
[li]Implement basic teleworker and branch services[/li]
[li]Describe broadband technologies[/li]
[li]Configure basic broadband connections[/li]
[li]Describe basic VPN technologies[/li]
[li]Configure GRE[/li]
[li]Describe branch access technologies[/li][/list]


IP Routing Overview


[li]Three main steps
[/list]


[li]Routing
[/list]


[li]Find the outgoing interface[/li][/list]
[/li]
[li]Switching


[li]Move the packet between interfaces[/li][/list]
[/li]
[li]Encapsulation


[li]Build the layer 2 header[/li]
[li]i.e. layer 2 packet rewrite[/li][/list]
[/li][/li]
The Routing Process


[li]Step 1: Find the longest match
[/list]


[li]show ip route 1.2.3.4
[/list]


[li]1.0.0.0/8[/li]
[li]1.2.0.0/16[/li]
[li][/list]
1.2.3.0/24[/li][/li][/li]
[li]Step 2: Perform recursive lookup


[li]1.2.3.4 via 5.6.7.8
[/list]


[li]5.6.7.8 via 9.0.1.2
[/list]


[li]9.0.1.2 via 3.4.5.6
[/list]


[li]3.4.5.6 directly connected, FastEthernet0/0[/li][/list]
[/li][/li][/li][/li]
Metric vs. Administrative Distance


[li]If there are multiple longest matches from...
[/list]


[li]the same protocol
[/list]


[li]Metric used to decide between multiple routes from the same protocol[/li][/list]
[/li]
[li]different protocols


[li]Administrative distance used to decide between multiple routes from different protocol[/li][/list]
[/li]
Administrative Distance Reference
Connected0
Static1
EIGRP summary5
External BGP20
Internal EIGRP90
IGRP*100
OSPF110
IS-IS115
RIP120
EGP*140
ODR160
External EIGRP170
Internal BGP200
Infinite255
*Deprecated

Route Selection Process Demistified


Code:
http://ciscoiseasy.blogspot.com/2010/12/lesson-32-route-selection-process.html



The Switching Process


[li]Move the packet between interfaces[/li]
[li]Where load balancing occurs[/li]
[li]Switching Paths
[/list]


[li]Process -> CPU Interrupt[/li]
[li]Fast -> Route Caching[/li]
[li]CEF[/li]
[li]...[/li][/list]
[/li]
The Encapsulation Process


[li]Build the layer 2 header based on the outgoing media
[/list]


[li]i.e. layer 2 packet rewrite[/li][/list]
[/li]
[li]Two different types of interfaces


[li]Point-to-point
[/list]


[li]Only one possible destination[/li]
[li]No need for layer 2 addressing[/li]
[li]e.g. HDLC, PPP, etc.[/li][/list]
[/li]
[li]Multipoint
[/li][li]More than one possible destination[/li]
[li]Requires layer 3 to layer 2 resolution[/li]
[li]e.g. Ethernet (MAC), Frame Relay (DLCI), ATM (VPI/VCI), etc.[/li][/li]

Introduction to Routing Protocols
What Is Routing?
To route, a router needs to do the following:


[li]Know the destination address[/li]
[li]Identify the sources it can learn from[/li]
[li]Discover possible routes[/li]
[li]Select the best route[/li]
[li]Maintain and verify routing information[/li][/list]

Routers must learn destinations that are not directly connected.
Static vs. Dynamic IP Routing


[li]Static Routing Function of IP
[/list]


[li]Routers do not share routing information.[/li]
[li]Routing tables are built manually.[/li][/list]
[/li]
[li]Dynamic Routing Function of Inter-Routing Protocols


[li]Routers share routing information automatically.[/li]
[li]Routing tables are built dynamically.[/li]
[li]Requires a routing protocol, such as RIP or OSPF.[/li][/list]
[/li]
Static Routing


[li]Configure unidirectional static routes to and from a stub network to allow communications to occur.[/li]
[li]Static routes in the routing table
[/list]


[li]Include: network address and subnet mask and IP address of next hop router[/li]
[li]Denoted with the code S in the routing table[/li][/list]
[/li]
[li]When to use static routes


[li]When network only consists of a few routers[/li]
[li]Network is connected to internet only through one ISP[/li][/list]
[/li]
Static Route Configuration
Router(config)#ip route network [mask] {address|interface} [distance] [permanent]
Defines a path to an IP destination network or subnet or host

Static Route Example
Router(config)#ip route 172.16.1.0 255.255.255.0 172.16.2.1
This is a unidirectional route. You must have a route configured in the opposite direction.
Default Routes
Router(config)#ip route 0.0.0.0 0.0.0.0 172.16.2.2
This route allows the stub network to reach all known network beyond opposite router.
Verifying the Static Route Configuration
Router#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route

Gateway of last resort is 172.16.2.2 to network 0.0.0.0

172.16.0.0/30 is subnetted, 1 subnets
C 172.16.2.0 is directly connected, FastEthernet0/0
S* 0.0.0.0/0 [1/0] via 172.16.2.2
Longest Prefix Match
192.16.5.33/32Host
192.16.5.32/27Subnet
192.16.5.0/24Network
192.16.0.0/16Block of Networks
0.0.0.0/0Default


[li]Supports host-specific routes, blocks of networks, and default routes[/li]
[li]Routers use longest prefix match[/li][/list]

Routing Protocols
Routing protocols are identified by the usage:


[li]Interior Gateway Protocols (IGP) are used within an autonomous system[/li]
[li]Exterior Gateway Protocols (EGP) are used between autonomous system[/li][/list]

Autonomous Systems (AS)


[li]An autonomous system is a collection of networks under a common administrative domain.[/li]
[li]An autonomous system identifies the domain within which routers exchange routing information.[/li]
[li]IGPs operate within an autonomous system.[/li]
[li]EGPs connect different autonomous systems.[/li][/list]

Classful Routing Overview


[li]Classful routing protocols do not include the subnet mask with the route advertisement.[/li]
[li]Within the same network, consistency of the subnet masks is assumed, one subnet mask for the entire network.[/li]
[li]Summary routes are exchanged between foreign networks.[/li]
[li]Example of classful routing protocols:
[/list]


[li]RIP Version 1 (RIPv1)[/li]
[li]IGRP[/li][/list]
[/li]
Classless Routing Overview


[li]Classless routing protocols include the subnet mask with the route advertisement.[/li]
[li]Classless routing protocols support variable-length subnet masking (VLSM); one network can have multiple masks.[/li]
[li]Summary routes must be manually controlled within the network.[/li]
[li]Examples of classless routing protocols:
[/list]


[li]RIP Version 2 (RIPv2)[/li]
[li]EIGRP[/li]
[li]OSPF[/li]
[li]IS-IS[/li]
[li]BGP[/li][/list]
[/li]
[li]RIPv2 and EIGRP act classful by default, and summary routes are exchanged between foreign networks.
The no auto-summary command forces these protocols to behave as if they are classless.[/li]
Enhance Interior Gateway Routing Protocol (EIGRP)
Open Shortest Path First (OSPF)
Border Gateway Protocol (BGP)
Internet Protocol version 6 (IPv6)
Manipulating Routing Updates (Redistribute)
Lab
ROUTE 642-902 Training


Code:
http://www.digitaltut.com


Cisco Q&A


Credit: Cisco


Route IPv4 Capacity Tested


[li]ME-3750 = 8,000[/li]
[li]ME-3600 = 20,000[/li]
[li]ME-3800 = 40,000[/li]
[li]C7609 sup 3B = 250,000[/li]
[li]C3945 = 400,000[/li]
[li]C7609 sup 3C = 1,000,000[/li][/list]

IPv6 = IPv4/2


Credit: P'Pong@AIT


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