Specifications

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Glossary
GL-5
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, Release 5.0(3)U2(2)
OL-25782-02
N
network layer
reachability
information
BGP network layer reachability information (NRLI). Contains the a list of network IP addresses and
network masks for networks that are reachable from the advertising BGP peer.
next hop
The next router that a packet is sent to on its way to the destination address.
NSSA
Not-So-Stubby-Area. Limits AS external LSAs in an OSPF area.
O
OSPF
Open Shortest Path First. An IETF link-state protocol. OSPFv2 supports IPv4.
P
path length
Sum of all link costs or the hop count that a packet experiences when routed from the source to the
destination.
R
redistribution
One routing protocol accepts route information from another routing protocol and advertises it in the
local autonomous system.
Reliable Transport
Protocol
Responsible for guaranteed, ordered delivery of EIGRP packets to all neighbors.
reliability
The dependability (usually described in terms of the bit-error rate) of each network link.
RIB
Routing Information Base. Maintains the routing table with directly connected routes, static routes, and
routes learned from dynamic unicast routing protocols.
routing information
base
See RIB.
route map
A construct used to map a route or packet based on match criteria and optionally alter the route or
packet based on set criteria. Used in route redistribution.
route
summarization
A process that replaces a series of related, specific routes in a route table with a more generic route.
router ID
A unique identifier used by routing protocols. If not manually configured, the routing protocol selects
the highest IP address configured on the system.