Category Archives Networking

IPv6 was created as IPv6 addresses were becoming exhausted. IPv6 addresses are 128 bits long. IPv6 defines two major types of unicast addresses. Global unicast addresses work like a public IPv4 address in that companies obtain a unique prefix with all addresses beginning at that prefix. An IPv6 prefix is often compared to an IPv4 network address. Unique local unicast…

Troubleshooting steps when dealing with routing protocols 1. Verify connectivity between the two routers by pinging the other router. - Show interfaces and show IP interfaces will list IP address information. 2. The routing protocol must pass authentication. - For EIGRP: debug eigrp packets - For OSPF: debug ospf adj | show ip ospf interface 3. For OSPF, the hello…

During my Cisco 100-101 and 200-101 CCNA exams, I compiled a list of flash card type system to help me learn the ideas of the curriculum. Spanning Tree Protocol - 802.1d Steps to STP convergence: 1. Elect the root bridge - Lowest Bridge ID wins. - If there is a tie, the lowest MAC address 2. Find the best path…

EtherChannel: Link Aggregation Protocol (LaGP) is one of few modes for link aggregation. LAGP uses Active or Passive modes for each side of the link. Port Aggregation Protocol (PaGP) uses dynamic desirable and dynamic auto in the styles of port negotiation. Dynamic Desirable + Dynamic Desirable = PaGP formed. Dynamic Desirable + Dynamic Auto = PaGP formed. Dynamic Auto +…