Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) v1.0

Discovery 1: Configure EIGRP Using Classic Mode and Named Mode for IPv4 and IPv6

Through this discovery, you will learn how to configure and verify EIGRP using classic mode and named mode for both IPv4 and IPv6. You will configure the EIGRP process, adjust EIGRP hello and hold timers, configure passive interfaces, and apply router IDs. In this discovery, you will have access to four routers: HQ, BR1, BR2, and DIST. All devices have their basic configurations in place, including hostnames and IPv4/IPv6 addresses.

Discovery 2: Verify the EIGRP Topology Table

Through this discovery, you will examine different EIGRP packet types. You will observe and learn about the EIGRP topology table and how EIGRP elects the best path to the destination.

Discovery 3: Configure EIGRP Stub Routing, Summarization, and Default Routing

Through this discovery, you will learn how to configure and verify EIGRP stub routing using classic mode for both IPv4 and IPv6. You will also configure EIGRP summaries for IPv4 and IPv6 and announce default routes to ensure full IPv4 and IPv6 connectivity to the Internet cloud. In this discovery, you will have access to four routers: HQ, BR1, BR2, and DIST. All devices have their basic configurations in place, including hostnames and IPv4/IPv6 addresses.

Discovery 4: Configure EIGRP Load Balancing and Authentication

Through this discovery, you will learn how to configure and verify EIGRP load balancing using named mode for both IPv4 and IPv6. You will also configure EIGRP authentication for classic mode and named mode. In this discovery, you will have access to four routers: HQ, BR1, BR2, and DIST. All devices have their basic configurations in place, including hostnames and IPv4/IPv6 addresses.

Discovery 5: Troubleshoot EIGRP Issues

This discovery will guide you through the troubleshooting of various IPv4 and IPv6 EIGRP configuration issues. The lab is prepared with the devices that are represented in the topology diagram and configured according to the "Device Information" table. All devices have their basic configurations in place, including hostnames and IP addresses. EIGRP AS 10 has been configured on all seven routers, but there are problems with the router configurations. Each router has a loopback interface with the IP address 192.168.R.1/24 (where R is the router number). The routing table on R1 is missing IPv4 routes to the loopback interface networks for each of its peers. R1 should also receive the IPv6 prefix that is associated to the R7 loopback 0 interface, and an IPv6 summary of the other R7 Loopback interfaces.

Discovery 6: Configure OSPFv3 for IPv4 and IPv6

Through this discovery, you will learn how to configure and establish OSPFv3 for IPv4 and IPv6 address families. You will observe the impact of OSPF hello and dead timer parameters on the OSPF neighbor relationship formation. In addition, you will learn about the roles of DR and BDR routers, and how to control DR and BDR election. You will also configure passive interfaces where OSPF neighbor adjacencies should not be established. In this discovery, you will have access to five routers from R1 to R5. R1, R4, and R5 are already preconfigured with OSPFv3. R2 is currently configured with OSPFv2 and traditional OSPFv3. You will be responsible for migrating the configuration on R2 to OSPFv3 address families. You will then fully configure a new branch router R3 for OSPv3 address families.

Discovery 7: Verify the Link-State Database

In this discovery, you will analyze the OSPFv3 LSDB and different LSA types. All routers have already been preconfigured with OSPFv3 for IPv4 and IPv6 address families. In this discovery, you will have access to routers R1 to R4, and router Ext. Routers R1 to R4 are configured with OSPFv3 for IPv4 and IPv6 address families. Router Ext is configured with static routing only. For simplicity, most of this discovery will focus on the IPv4 address family. All commands presented here apply equally to the IPv6 address family.

Discovery 8: Configure OSPF Stub Areas and Summarization

Through this discovery, you will learn how to implement four special area types in an OSPFv3 environment: stub, totally stubby, NSSA, and totally NSSA. The stub and totally stubby area are deployed to reduce the size of the OSPF database and routing table. The stub area does not accept external routes, while a totally stubby area does not accept external or inter-area routes. The NSSA area allows for redistribution but does not accept external routes from the backbone area. Totally NSSA also allows redistribution but does not accept external or inter-area routes form the backbone area.

Discovery 9: Configure OSPF Authentication

Through this discovery, you will learn how to configure OSPF authentication in an OSPFv3 network. The link between R1 and R2 will use IPsec AH authentication, while the link between R1 and R3 will use IPsec AH + ESP encryption. Finally, the entire backbone area will be configured with cryptographic authentication using HMACSHA-256 key chains. In this discovery, you will have access to routers R1 to R4. These routers are preconfigured with OSPFv3 for IPv4 and IPv6 address families.

Discovery 10: Troubleshoot OSPF Issues

This discovery will guide you through the troubleshooting of various IPv4 and IPv6 OSPF configuration issues. The lab is prepared with the devices that are represented in the topology diagram and configured according to the "Device Information" table. All devices have their basic configurations in place, including hostnames and IP addresses. OSPF has been configured on all seven routers, but there are problems with the router configurations. Each router has a loopback interface with the IP address 192.168.R.1/24 (where R is the router number). The routing table on R1 is missing IPv4 routes to the loopback interface networks for each of its peers. R1 should also receive the IPv6 prefix associated to the R7 Loopback 0 interface.

Discovery 11: Implement Routing Protocol Redistribution

Through this discovery, you will learn how to perform basic redistribution configuration. You will configure redistribution from OSPF to EIGRP for both IPv4 and IPv6, and redistribution of EIGRP into OSPF for both IPv4 and IPv6. You will also change the metric type for EIGRP routes redistributed into OSPF. R1, R3, and R4 are configured with OSPFv3 for IPv4 and IPv6 address families, while R1 and R2 are configured with EIGRP using named mode for IPv4 and IPv6 address families.

Discovery 12: Manipulate Redistribution

Through this discovery, you will learn how to perform basic redistribution manipulation. You will configure mutual redistribution between EIGRP and OSPF routing domains and filter redistribution using prefix lists and distribute lists. You will also learn how to selectively redistribute routes from one routing domain to another. R1, R3, and R4 are configured with OSPFv3 for IPv4 and IPv6 address families, while R1 and R2 are configured with EIGRP using named mode for IPv4 and IPv6 address families. EIGRP uses autonomous system 100 for both IPv4 and IPv6 address families. OSPFv3 uses process ID 10.

Discovery 13: Manipulate Redistribution Using Route Maps

Through this discovery, you will learn how to use route maps to manipulate redistribution. You will also learn how to change the administrative distance of routes to implement routing of IP traffic over the correct path. You will first configure redistribution between the OSPF and EIGRP domains without using any filtering mechanism. After that, you will configure route maps to filter routes within redistribution. You will explore using both ACLs and route tags to achieve this. You will then change the administrative distance for certain routes to enable optimal routing.

Discovery 14: Troubleshoot Redistribution Issues

This discovery will guide you through the troubleshooting of various IPv4 and IPv6 redistribution issues. The lab is prepared with the devices that are represented in the topology diagram and configured according to the Job Aids section. All devices have their basic configurations in place, including hostnames and IP addresses.

Discovery 15: Implement PBR

In this discovery, you will learn how to use policy-based routing to influence path selection. First, you will verify normal traffic paths, as selected by the traditional destination-based routing. Then, you will configure PBR to alter the traffic flow for Guest and Employee LAN devices. You will verify both the PBR configuration and the new traffic path. You will review Cisco IOS IP Service Level Agreement (SLA) functionality and how it can be combined with PBR to achieve dynamic path control. Finally, you will also configure PBR for traffic originating locally on router R1. The Guest and Employee PCs, and SRV1, are simulated by routers running Cisco IOS Software.

Discovery 16: Configure IBGP and EBGP

Through this discovery, you will learn how to establish internal and external BGP sessions and advertise network prefixes via BGP. You will monitor how the routing information is propagated and maintained in BGP. You will establish the BGP sessions between the loopback IP addresses to make the environment resilient against link failures.

Discovery 17: Implement BGP Path Selection

Through this discovery, you will configure the BGP attributes of weight, local preference, and AS-Path to prefer the connection via ISP1 for traffic exchange with external autonomous systems, such as ISP3. First, you will assign a higher weight for updates that are received by GW2 from GW1 to prefer GW1 as the exit point from the AS 65000. Having verified that the weight has only local significance, you will replace the weight-based configuration with a higher local preference setting on GW1 for updates that are received from ISP1. Finally, you will cause the inbound traffic to AS 65000 to prefer the faster path by configuring the AS path prepending for updates that are advertised by GW2 to ISP2.

Discovery 18: Configure BGP Advanced Features

Through this discovery, you will learn how to configure advanced features for BGP, such as peer groups, authentication, route summarization, route filtering, and default routing. You will also modify the default BGP timers and explore BGP path selection by manipulating the MED attribute. This discovery will review local preference configuration and introduce the newer 32-bit AS number format. In this discovery, you will have access to all routers: GW1, GW2, ISP1, ISP2, and ISP3. GW1 and GW2 are preconfigured with OSPFv2 for internal reachability. ISP1, ISP2, and ISP3 are preconfigured with BGP.

Discovery 19: Configure BGP Route Reflectors

Through this discovery, you will learn how to eliminate the need for full mesh IBGP sessions by introducing the route reflector feature into the AS.

Discovery 20: Configure MP-BGP for IPv4 and IPv6

Through this discovery, you will establish internal and external BGP sessions and advertise IPv6 network prefixes via BGP. You will deploy IPv4 and IPv6 transport. You will use route maps to set the next-hop attribute to an IPv6 address when exchanging the IPv6 networks over a IPv4 transport session. You will also use prefix lists to filter IPv6 prefixes being advertised to AS 65100.

Discovery 21: Troubleshoot BGP Issues

This discovery will guide you through the troubleshooting of various IPv4 BGP configuration issues. The lab is prepared with the devices that are represented in the topology diagram and configured according to the tables found in the Job Aids section. All devices have their basic configurations in place, including hostnames and IP addresses. Open Shortest Path First (OSPF) has been preconfigured in AS 65001 for internal reachability, and BGP has been preconfigured on all eight routers according to the AS numbers in the diagram. Full-mesh IBGP peering in AS 65001 uses Loopback1 interfaces instead of directly connected interfaces. R2 and R3 advertise correct next hop information to their IBGP peers. EBGP peering between R2 and R4 uses Loopback1 interfaces instead of directly connected interfaces.

Discovery 22: Configure Routing with VRF-Lite

In this discovery, you will deploy VRF-Lite support for OSPFv3, EIGRP, MP-BGP, and static routing. You will deploy the required VRFs, assign interfaces to them, and enable routing between the customer routers and the ISP. In thecase of MP-BGP, you will also configure route distinguishers and route targets to allow for inter-VRF route leaking. All tasks are performed on the ISP router. All customer routers and the IXSW switch are pre-configured with the necessary configuration.

Discovery 23: Implement Cisco IOS DMVPN

Through this discovery, you will configure hub-and-spoke, and spoke-to-spoke DMVPN tunnels. The HQ router will serve as the DMVPN hub, and the BRANCH1 and BRANCH2 routers will function as the DMVPN spokes. This discovery will guide you through the deployment of all three phases of DMVPN configuration. The discovery is prepared with the devices that are represented in the topology diagram and configured according to the information in the Job Aids section. All devices have their basic configurations in place, including hostnames and IP addresses.

Discovery 24: Obtain IPv6 Addresses Dynamically

In this discovery, you will learn how to configure SLAAC, stateful DHCPv6, and stateless DHCPv6. PC1 will obtain an IPv6 addresses from R2 using SLAAC. PC2 will obtain an IPv6 address from R1 using stateful DHCPv6. PC3 will obtain an IPv6 address from R2 using stateless DHCPv6. The discovery is prepared with the devices that are represented in the topology diagram and configured according to the information in the Job Aids section. All devices have their basic configurations in place, including hostnames and IP addresses. SW1 is preconfigured with VLANs, access ports to the PCs and a trunk port to R2. R2 is configured as a router on a stick to support inter-VLAN routing for VLAN 10, VLAN 20, and VLAN 30. R1 is configured with an IPv6 default route that points to R2. The PCs are simulated by routers running Cisco IOS.

Discovery 25: Troubleshoot DHCPv4 and DHCPv6 Issues

This discovery lab will guide you through DHCP services troubleshooting using Cisco IOS tools. You will start with PC1 and proceed one at a time, finishing with PC6. Each PC is first configured to obtain its IPv4 or IPv6 address using DHCP. The PC’s individual Ethernet 0/0 interfaces are currently in a shutdown state to allow easier isolation and debugging of the issue. You will enable the interfaces in turn as you work through the lab. R1 and R2 are preconfigured with EIGRP for IPv4 to ensure end-to-end network reachability. R1’s loopback 0 interface is used to simulate external public IPv4 and IPv6 addresses. R1 advertises an IPv4 default route into EIGRP.

Discovery 26: Troubleshoot IPv4 and IPv6 ACL Issues

This discovery lab will guide you through troubleshooting IPv4 and IPv6 ACL issues. There is a total of three IPv4 ACL issues and three IPv6 ACL issues. R1, R2, and R3 are preconfigured with EIGRP using named mode configuration for IPv4 and IPv6 address families. The PC and SRV devices are simulated by routers running Cisco IOS. The discovery is prepared with the devices that are represented in the topology diagram and configured according to the information in the Job Aids section. All devices have their basic configurations in place, including hostnames and static IP addresses where applicable.

Discovery 27: Configure and Verify uRPF

This discovery will guide you through the configuration and verification of Unicast Reverse Path Forwarding (uRPF) in a simple network topology. You will explore the different uRPF configuration options (Strict and Loose) and investigate CEF packet drops caused by uRPF. R1 and R2 are initially configured with static routes ensuring that symmetric routing occurs across the path through SW1. You will then migrate to an asymmetric routing scenario where traffic will flow from R1 to R2 across SW1 but then from R2 to R1 across SW2. Finally, you will instead use default routes and observe how uRPF can process packets that are default routed.

Discovery 28: Troubleshoot Network Management Protocol Issues: Lab 1

This discovery will guide you through the troubleshooting of issues relating to network management and testing.Three tickets have been reported and you will be taken through the steps to resolve each one in turn. For this discovery, the issues that have been reported relate to AAA, Secure Copy Protocol (SCP), and Cisco IP SLA.

Discovery 29: Troubleshoot Network Management Protocol Issues: Lab 2

This discovery will guide you through the troubleshooting of issues relating to network management and testing. Three tickets have been reported and you will be taken through the steps to resolve each one in turn. For this discovery, the issues that have been reported relate to Cisco IP SLA tracking, Syslog, and SNMP.

ENARSI1.0(300-410) New! Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) v1.0