What Is ACLs? Access Control Lists (ACLs) are a set of rules used in networking to control the flow of traffic into and out of network devices like routers and switches. These rules determine which packets (small units of data) are allowed or denied passage through a network interface. ACLs are crucial for network security and traffic management.… Read More »
What Is CIDR? CIDR (Classless Inter-Domain Routing) was introduced in 1993 (RCF 1517) replacing the previous generation of IP address syntax – classful networks. CIDR allowed for more efficient use of IPv4 address space and prefix aggregation, known as route summarization or supernetting. CIDR introduction allowed for: CIDR allows routers to group routes to reduce the bulk of… Read More »
Frame Relay – WAN Connection. Frame Relay is a popular high-performance wide area network – WAN protocol that operates at the physical and data link layers of the OSI reference model. Frame relay is a type of WAN connection used to connect one site to many remote sites through a single physical circuit, this operation makes it easy… Read More »
This page provides methods to troubleshoot frame relay configurations, emphasizing verification using commands like Debug frame-relay lmi, Show interfaces, Show frame-relay pvc, Show frame-relay map, and Show frame-relay lmi.
Switches utilize two packet forwarding methods: Store-and-Forward, where the entire frame is received and error-checked before forwarding; and Cut-through, a faster method that immediately forwards received frames without error-checking.
