Specifications

346 ExtremeWare XOS 11.0 Concepts Guide
Glossary
N
neutral state/switch In ESRP, the neutral state is the initial state entered by the switch. In a
neutral state, the switch waits for ESRP to initialize and run. A neutral
switch does not participate in ESRP elections.
NLRI Network layer reachability information. In BGP, the system sends
routing update messages containing NLRI to describe a route and how
to get there. A BGP update message carries one or more NLRI prefixes
and the attributes of a route for each NLRI prefix; the route attributes
include a BGP next hop gateway address, community values, and
other information.
node In the Extreme Networks implementation, a node is a CPU that runs
the management application on the switch. Each MSM installed in the
chassis is a node.
In general networking terms, a node is a device on the network.
Node Manager The Node Manager performs the process of node election, which
selects the master, or primary, MSM when you have two MSMS
installed in the chassis. The Node Manager is useful for system
redundancy.
NSSA Not-so-stubby area. In OSPF, NSSA is a stub area, which is connected
to only one other area, with additional capabilities:
• External routes originating from an ASBR connected to the NSSA
can be advertised within the NSSA.
• External routes originating from the NSSA can be propagated to
other areas.
O
odometer In Extreme Networks implementation, each field replaceable
component contains a system odometer counter in EEPROM. Using
the CLI, you can display how long each following individual
component has been in service:
• chassis
• MSMs
• I/O modules
• power controllers
option 82 This is a security feature that you configure as part of BOOTP/DHCP.
Option 82 allows a server to bind the client’s port, IP address, and
MAC number for subscriber identification.
OSI Open Systems Interconnection. OSI is the international standard
computer network architecture known for its 7-layer reference model.