130 likes | 220 Views
Chabot College. Frame Relay Part 2. Frame Relay Operation. Hub-and-spoke Topology. Frame Relay Operation. LMI. Provides Status Mechanism. Tells you a VC is ACTIVE, INACTIVE, or DELETED. LMI and Inverse ARP (I-ARP). LMI and Inverse ARP (I-ARP). LMI and Inverse ARP (I-ARP).
E N D
Chabot College Frame Relay Part 2
Frame Relay Operation Hub-and-spoke Topology
LMI Provides Status Mechanism. Tells you a VC is ACTIVE, INACTIVE, or DELETED
FR and Split Horizon • Frame Relay allows for multipoint configurations. • More than two routers can belong to the same IP subnet. This is problematic in hub-and-spoke topologies. • Routing protocols have split horizon issues. • If a routing protocol (e.g. RIP) is following split horizon rules, it cannot send updates out the same logical interface they were received on.
FR and Split Horizon Using subinterfaces solve split horizon issues.
Frame Relay Subinterfaces • Two kinds of FR subinterfaces: • Point-to-point • Multipoint