Extreme Networks ExtremeWare XOS 11.3, Manual

Page: 663 / 698

ExtremeWare XOS 11.3 Concepts Guide
663
RMON Remote monitoring. RMON is a standardized method to make switch
and router information available to remote monitoring applications. It
is an SNMP network management protocol that allows network
information to be gathered remotely. RMON collects statistics and
enables a management station to monitor network devices from a
central location. It provides multivendor interoperability between
monitoring devices and management stations. RMON is described in
several RFCs (among them IETF RFC 1757 and RFC 2201). Network
administrators use RMON to monitor, analyze, and troubleshoot the
network. A software agent can gather the information for presentation
to the network administrator with a graphical user interface (GUI).
The administrator can find out how much bandwidth each user is
using and what Web sites are being accessed; you can also set alarms
to be informed of potential network problems.
root bridge In STP, the root bridge is the bridge with the best bridge identifier
selected to be the root bridge. The network has only one root bridge.
The root bridge is the only bridge in the network that does not have a
root port.
root port In STP, the root port provides the shortest path to the root bridge. All
bridges except the root bridge contain one root port.
route aggregation In BGP, you can combine the characteristics of several routes so they
are advertised as a single route, which reduces the size of the routing
tables.
route flapping A route is flapping when it is repeatedly available, then unavailable,
then available, then unavailable. In the ExtremeWare XOS BGP
implementation, you can minimize the route flapping using the route
flap dampening feature.
route reflector In BGP, you can configure the routers within an AS such that a single
router serves as a central routing point for the entire AS.
routing confederation In BGP, you can configure a fully meshed AS into several sub-ASs and
group these sub-ASs into a routing confederation. Routing
confederations help with the scalability of BGP.
RSTP Rapid Spanning Tree Protocol. RSTP, described in IEEE 802.1w, is an
enhanced version of STP that provides faster convergence. The
Extreme Networks implementation of RSTP allows seamless
interoperability with legacy STP.
S
SA Source address. The SA is the IP or MAC address of the device issuing
the packet.
SCP Secure Copy Protocol. SCP2, part of SSH2, is used to transfer
configuration and policy files.
R (Continued)