Owner's Manual

936 | Appendix E. Glossary
NETGEAR 8800 User Manual
netlogin Network login provides extra security to the network by assigning addresses
only to those users who are properly authenticated. You can use web-based,
MAC-based, or IEEE 802.1x-based authentication with network login. The two
modes of operation are campus mode and ISP mode.
netmask A netmask is a string of 0s and 1s that mask, or screen out, the network part of
an IP address, so that only the host computer part of the address remains.
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 NETGEAR 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 NETGEAR 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)