Glossary
HST-3000 Ethernet Testing User’s Guide
321
MPLS — Multiprotocol Label
Switching. A form of frame
encapsulation that uses labels
rather than routing tables to
transmit layer 3 traffic over a
layer 2 Ethernet network.
O
OAM — Operations, Adminis-
tration, and Maintenance. The
HST allows you to run link and
service layer OAM applications.
Overload rate — The
maximum rate of transmitted
traffic at which no frames are
dropped (determined using the
RFC 2544 Throughput test).
The overload rate is used to
force a receiving network
element to drop frames when
running the System Recovery
test.
P
Packet — Bundle of data,
configured for transmission.
Consists of data to be trans-
mitted and control information.
Passing rate — The maximum
rate of transmitted traffic at
which no frames are dropped
(determined using the
RFC 2544 Throughput test).
Pattern Sync — The condition
occurring when the data
received matches the data that
is expected for a period of time
defined by the pattern selected.
Ping — Program which sends
an ICMP echo request packet to
an IP address and awaits a
reply. Ping requests are typically
used to test connectivity. You
can transmit and respond to
ping packets using the HST.
PoE — Power Over Ethernet.
PPPoE — Point to Point
Protocol over Ethernet. PPPoE
is used on the GUI and
throughout this guide to see the
applications used to establish a
connection to a PPPoE peer via
a login process. The HST can
emulate a PPPoE client or
server.
Q
Q-in-Q — Also referred to as
VLAN stacking, a form of encap-
sulation that enables service
providers to use a single VLAN
to support customers who have
multiple VLANs. Q-in-Q VLANs
can also be used to provide
virtual access and connections
to multiple services available
over the ISPs, ASPs, and
storage services.
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