Networking Scenarios with CISCO and GNS3

Explore the unified networking lab by setting up a virtual environment, accessing the web interface via browser, configuring images and interfaces, and connecting devices to simulate Cisco and GNS3 scenarios.

Implement EIGRP by configuring IP addresses on interfaces, defining networks, and enabling the routing process across multiple routers in a GNS3 lab, while exploring loopback addresses and equal-cost paths.

Configure OSPF in a multi-router topology by assigning /30 IP addresses to interfaces, enabling OSPF on each interface, and designating area 0 for adjacency, then verify connectivity with show commands.

Explore how to redistribute routes between routing protocols in a Cisco and GNS3 lab, enabling connectivity across multiple domains. Learn to set metrics, verify external routes, and troubleshoot bidirectional redistribution.

Learn to filter routes with prefix lists and distribution lists, restricting router 5 from learning unnecessary networks, and originate a default route to exit the domain.

Learn to optimize routing tables by filtering redistributed routes, using default routes for selective advertisement, and propagating summarized prefixes across multiple domains to enable equal-cost load balancing.

Implement basic BGP by configuring neighbor relationships between router six and nine, setting interfaces and IP addresses, advertising networks with autonomous system four, and establishing a default route to ISP.

Explore optimizing IGP with BGP by controlling default routes, advertising them to neighbors, and selective redistribution to reach the internet while safeguarding internal networks.

Explore multihome topology with Cisco and GNS3, configure interfaces and IP addresses, establish IBGP and EBGP sessions, and advertise networks to optimize route propagation and path selection.

Explore BGP AS-path filtering on Cisco gear and GNS3, using route maps, access lists, and regular expressions to control which networks are advertised or learned between peers.

Learn how BGP AS-path manipulation and prepending steer traffic by biasing route selection, using primary and backup links to optimize bandwidth, cost, and reachability.

Explore the ISIS routing protocol, a link-state standard for internal networks. See how level 1 and level 2 areas share routing data using link-state messages and Dijkstra’s algorithm.

Explore configuring ISIS on Cisco and Juniper devices, including setting the system ID, enabling ISIS on interfaces, and assigning loopback networks, while addressing interoperability between Cisco and Juniper IS-IS implementations.

Explore inter-level route leakage and default route generation between level 1 and level 2 databases, and how policy options control route advertisements in Cisco and Juniper.

Explore how ISIS metric types govern route redistribution between levels, compare narrow and wide metrics, and analyze Cisco and Juniper configurations in enterprise networks.

Discover how to implement ISIS authentication on Cisco and Jeneba routers, configuring plain text authentication, defining a key such as ABC, and enabling authentication at a level for end-to-end behavior.