Extreme Networks ExtremeWare XOS 11.3, Руководство пользователя

Страница: 659 / 698

ExtremeWare XOS 11.3 Concepts Guide
659
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 on modular
switches 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 modular 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 the Extreme Networks implementation, each field replaceable
component contains a system odometer counter in EEPROM.
On modular switches, using the CLI, you can display how long each
following individual component has been in service:
●
chassis
●
MSMs
●
I/O modules
●
power controllers
On stand-alone switches, you display the days of service for the
switch.
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.
N (Continued)