N

named-path

JUNOS software syntax that specifies a portion or the entire network path that should be used as a constraint in signaling an MPLS label-switched path.

neighbor

Adjacent system reachable by traversing a single subnetwork. An immediately adjacent router. A system to which a BGP session is established. Also called a peer.

network entity title (NET)

Network address defined by the ISO network architecture and used in CLNS-based networks.

network layer reachability information (NLRI)

Information that is carried in BGP packets and is used by MBGP.

network-link advertisement

An OSPF link-state advertisement flooded throughout a single area by designated routers to describe all routers attached to the DR's local segment.

network LSA

OSPF link-state advertisement sent by the DR on a broadcast or NBMA segment. It advertises the subnet associated with the DR's segment.

network service access point (NSAP)

Connection to a network that is identified by a network address.

Network Summary LSA

OSPF link-state advertisement sent by an ABR to advertise internal OSPF routing knowledge across an area boundary.

Network Time Protocol (NTP)

Protocol used to synchronize computer clock times on a network.

Next Hop

BGP attribute that specifies the router to send packets to for a particular set of routes.

nonclient peer

In a BGP route reflection network, a BGP peer that is not a member of a cluster. See also client peer.

notification cell

JUNOS software data structure generated by the Distributed Buffer Manager ASIC that represents the header contents of an IP packet. The Internet Processor ASIC uses the notification cell to perform a forwarding table lookup.

Notification message

BGP message that informs a neighbor about an error condition and then possibly terminates the BGP peering session.

not-so-stubby area (NSSA)

In OSPF, a type of stub area in which external routes can be flooded.

n-selector

Last byte of an ISO Network Entity Title (NET) address.

Null Register message

A PIM message sent by the first hop router to the RP. It informs the RP that the local source is still actively sending multicast packets into the network should future interested listeners send a Join message to the RP.

numeric range match conditions

The use of numeric values (protocol and port numbers) in the header of an IP packet as match criteria in a firewall filter.