Specifications

Send document comments to [e-mail].
Glossary
GL-2
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, Release 5.0(3)U2(2)
OL-25782-02
bandwidth
The available traffic capacity of a link.
BDR
Backup designated router. An elected router in a multi-access OSPF network that acts as the backup if
the designated router fails. All neighbors form adjacencies with the backup designated router (BDR)
as well as the designated router.
BGP
Border Gateway Protocol. BGP is an interdomain or exterior gateway protocol.
BGP peer
A remote BGP speaker that is an established neighbor of the local BGP speaker.
BGP speaker
BGP-enabled router.
C
communication cost
Measure of the operating cost to route over a link.
converged
The point at which all routers in a network have identical routing information.
convergence
See converged.
D
dead interval
The time within which an OSPF router must receive a Hello packet from an OSPF neighbor. The dead
interval is usually a multiple of the hello interval. If no Hello packet is received, the neighbor adjacency
is removed.
default gateway
A router to which all unroutable packets are sent. Also called the router of last resort.
delay
The length of time required to move a packet from the source to the destination through the
internetwork.
designated router
See DR.
DHCP
Dynamic Host Control Protocol.
Diffusing Update
Algorithm
See DUAL.
distance vector
Defines routes by distance (for example, the number of hops to the destination) and direction (for
example, the next-hop router) and then broadcasts to the directly connected neighbor routers.
DNS client
Domain Name System client. Communicates with DNS server to translate a host name to an IP address.
DR
Designated router. An elected router in a multi-access OSPF network that sends LSAs on behalf of all
its adjacent neighbors. All neighbors establish adjacency with only the designated router and the
backup designated router.
DUAL
Diffusing Update Algorithm. EIGRP algorithm used to select optimal routes to a destination.