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Glossary
GL-4
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
I
iBGP
Internal Border Gateway Protocol (BGP). Operates within an autonomous system.
ICMP
IETF RFCs
Internet Engineering Task Force Request for Comments.
IGP
Interior gateway protocol. Used between routers within the same autonomous system.
instance
An independent, configurable entity, typically a protocol.
IP tunnels
IPv4
Internet Protocol version 4.
IPv6
Internet Protocol version 6.
IS-IS
Intermediate System to Intermediate System. An ISO interior gateway protocol.
K
keepalive
A special message sent between routing peers to verify and maintain communications between the pair.
key-chain
management
A method of controlling authentication keys. See the Cisco NX-OS Security Configuration Guide.
L
link cost
An arbitrary number configured on an OSPF interface which is in shortest path first calculations.
link-state
Shares information about a link, link cost to neighboring routers.
link-state
advertisement
See LSA.
LSA
Link-state advertisement. An OSPF message to share information on the operational state of a link, link
cost, and other OSPF neighbor information.
link-state database
OSPF database of all LSAs received. OSPF uses this database to calculate the best path to each
destination in the network.
link-state refresh
The time that OSPF floods the network with LSAs to ensure all OSPF routers have the same
information.
load
The degree to which a network resource, such as a router, is busy.
load balancing
The distribution of network traffic across multiple paths to a given destination.
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