Specifications

340 ExtremeWare XOS 11.0 Concepts Guide
Glossary
EDP Extreme Discovery Protocol. EDP is a protocol used to gather
information about neighbor Extreme Networks switches. Extreme
Networks switches use EDP to exchange topology information.
EEPROM Electrically erasable programmable read-only memory. EEPROM is a
memory that can be electronically programmed and erased but does
not require a power source to retain data.
EGP Exterior Gateway Protocol. EGP is an Internet routing protocol for
exchanging reachability information between routers in different ASs.
BGP is a more recent protocol that accomplishes this task.
election algorithm In ESRP, this is a user-defined criteria to determine how the master
and slave interact. The election algorithm also determines which
device becomes the master or slave and how ESRP makes those
decisions.
ELRP Extreme Loop Recovery Protocol. ELRP is an Extreme
Networks-proprietary protocol that allows you to detect Layer 2 loops.
EMISTP Extreme Multiple Instance Spanning Tree Protocol. This Extreme
Networks-proprietary protocol uses a unique encapsulation method
for STP messages that allows a physical port to belong to multiple
STPDs.
encapsulation mode Using STP, you can configure ports within an STPD to accept specific
BPDU encapsulations. The three encapsulation modes are:
• 802.1D—This mode is used for backward compatibility with
previous STP versions and for compatibility with third-party
switches using IEEE standard 802.1D.
• EMISTP—Extreme Multiple Instance Spanning Tree Protocol mode
is an extension of STP that allows a physical port to belong to
multiple STPDs by assigning the port to multiple VLANs.
• PVST+—This mode implements PVST+ in compatibility with
third-party switches running this version of STP.
EPICenter EPICenter is an Extreme Networks-proprietary graphical user interface
(GUI) network management system.
ESRP Extreme Standby Router Protocol. ESRP is an Extreme
Networks-proprietary protocol that provides redundant Layer 2 and
routing services to users.
ESRP-aware device This is an Extreme Networks device that is not running ESRP itself but
that is connected on a network with other Extreme Networks switches
that are running ESRP. These ESRP-aware devices also fail over.
ESRP domain An ESRP domain allows multiple VLANs to be protected under a
single logical entity. An ESRP domain consists of one domain-master
VLAN and zero or more domain-member VLANs.
ESRP-enabled device An ESRP-enabled device is an Extreme Networks switch with an ESRP
domain and ESRP enabled. ESRP-enabled switches include the ESRP
master and slave switches.
E (continued)