Network Address Translation

Configurations: R2object-group network RFC191810.0.0.0 255.0.0.0172.16.0.0 255.240.0.0192.168.0.0 255.255.0.0ip access-list extended BLOCK-RFC1918deny ip any object-group RFC1918permit ip 128.0.0.0 0.0.0.3 anypermit ip 128.0.0.4 0.0.0.3 anypermit ip 129.0.0.0 0.0.0.3 anypermit ip 129.0.0.4 0.0.0.3 anyint…

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Switch

Hold a map called Mac-Adress Table.Unlike HUB, switch forward its frame to a specific destination only.How does the switch works?Initially,¬† switches broadcast an ARP request to acquire the MAC address…

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DMVPN (vpn multi-point)

Vpn Multipoint Sample Configuration #R1 (HUB Router)#Phase 1crypto isakmp policy 100hash md5authentication pre-sharegroup 1encryption aeslifetime 86400!exit!crypto isakmp key 6 KEY address 26.0.0.2crypto isakmp key 6 KEY address 27.0.0.2crypto isakmp key…

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PBR (Policy Based Routing)

Policy Based Routing 1.) Override the instruction of the routing table using PBR2.) Specific traffic to be routed differently from the¬†routing table, maybe for security reasons, performance reasons or some…

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MPLS

Multiprotocol Label Switching (MPLS) is a routing technique in telecommunications networks that directs data from one node to the next based on short path labels rather than long network addresses,…

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BGP

Border Gateway Protocol (BGP) is a standardized exterior gateway protocol designed to exchange routing and reachability information among autonomous systems (AS) on the Internet. Troubleshooting Guide Neighbor formation The neighbor…

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OSPF

Open Shortest Path First (OSPF) is a routing protocol for Internet Protocol (IP) networks. It uses a link-state routing (LSR) algorithm and falls into the group of interior gateway protocols…

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EIGRP

Enhanced Interior Gateway Routing Protocol (EIGRP) is an advanced distance-vector routing protocol that is used on a computer network for automating routing decisions and configuration. The protocol was designed by…

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