Specifications

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Glossary
GL-6
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, Release 5.0(3)U2(2)
OL-25782-02
S
SPF algorithm
Shortest Path First algorithm. Dijkstra’s algorithm used by OSPF to determine the shortest route
through a network to a particular destination.
split horizon
Routes learned from an interface are not advertised back along the interface they were learned on,
preventing the router from seeing its own route updates.
split horizon with
poison reverse
Routes learned from an interface are set as unreachable and advertised back along the interface they
were learned on, preventing the router from seeing its own route updates.
static route
A manually configured route.
stub area
An OSPF area that does not allow AS External (type 5) LSAs.
stub router
A router that has no direct connection to the main network and which routes to that network using a
known remote router.
SVI
Switched Virtual Interface.
U
UFIB
Unicast IPv4 forwarding information base.
URIB
Unicast IPv4 routing information base. The unicast routing table that gathers information from all
routing protocols and updates the forwarding information base for each module.
V
virtualization
A method of making a physical entity act as multiple, independent logical entities.
VRF
Virtual Routing and Forwarding. A method used to create separate, independent Layer 3 entities within
a system.
VRRP
Virtual Router Redundancy Protocol.