Owner's Manual

940 | Appendix E. Glossary
NETGEAR 8800 User Manual
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 XCM8800 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 NETGEAR
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.
sFlow sFlow allows you to monitor network traffic by statistically sampling the network
packets and periodically gathering the statistics. The sFlow monitoring system
consists of an sFlow agent (embedded in a switch, router, or stand-alone probe)
and an external central data collector, or sFlow analyzer.
SFP Small form-factor pluggable. SFP is a specific type of GBIC, designed for use
with small form factor connectors. These transceivers offer high speed and
physical compactness.
6in4 tunnels The 6in4 tunnels, which encapsulate IPv6 packets into IPv4 packets, use
dynamic routing protocols to establish connectivity between several IPv6
networks through over the intervening IPv4 network. The 6in4 tunnel must be
created at each tunnel endpoint. The IPv6 routing protocol considers the 6in4
tunnel as a single IPv6 hop, even if the tunnel comprises many IPv4 hops; the
IPv6 protocol considers the 6in4 tunnel as a normal IPv6 point-to-point link. You
can have many 6in4 tunnels per VR.
R (Continued)