ExtremeWare XOS 11.3 Concepts Guide
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ISP An Internet Service Provider is an organization that provides access to
the Internet. Small ISPs provide service via modem and ISDN while
the larger ones also offer private line hookups (T1, fractional T1, etc.).
Customers are generally billed a fixed rate per month, but other
charges may apply. For a fee, a Web site can be created and
maintained on the ISP's server, allowing the smaller organization to
have a presence on the Web with its own domain name.
IR Internal router. In OSPF, IR is an internal router that has all interfaces
within the same area.
IRDP Internet Router Discovery Protocol. Used with IP, IRDP enables a host
to determine the address of a router that it can use as a default
gateway. In Extreme Networks implementation, IP multinetting
requires a few changes for the IRDP.
J
jumbo frames These are Ethernet frames that are larger that 1522 bytes (including the
4 bytes in the CRC). The jumbo frame size is configurable on Extreme
Networks devices; the range is from 1523 to 9216 bytes.
L
LACP Link Aggregation Control Protocol. LACP is part of the IEEE 802.3ad
and automatically configures multiple aggregated links between
switches.
LAG Link aggregation group. A LAG is the logical high-bandwidth link
that results from grouping multiple network links in link aggregation
(or load sharing). You can configure static LAGs or dynamic LAGs
(using the LACP).
Layer 2 Layer 2 is the second, or data link, layer of the OSI model, or the MAC
layer. This layer is responsible for transmitting frames across the
physical link by reading the hardware, or MAC, source and
destination addresses.
Layer 3 Layer 3 is the third layer of the OSI model. Also known as the
network layer, Layer 3 is responsible for routing packets to different
LANs by reading the network address.
LED Light-emitting diode. LEDs are on the device and provide information
on various states of the device’s operation. See the Consolidated XOS
Hardware Installation Guide for a complete explanation of the LEDs on
devices running ExtremeWare XOS.
license ExtremeWare XOS version 11.1 introduces a licensing feature to the
ExtremeWare XOS software. You must have a license, which you
obtain from Extreme Networks, to apply the full functionality of some
features.
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