SNMP (Simple Network Management Protocol)
version 3, the user-based security model uses the
traditional concept of user names to associate with security levels to support secure network
management.
virtual router
In the Extreme Networks implementations, virtual routers allow a single physical switch to be split into
multiple virtual routers. Each virtual router has its own IP address and maintains a separate logical
forwarding table. Each virtual router also serves as a configuration domain. The identity of the virtual
router you are working in currently displays in the prompt line of the CLI. The virtual routers discussed in
relation to Extreme Networks switches themselves are not the same as the virtual router in
(Virtual Router Redundancy Protocol)
.
, the virtual router is identified by a virtual router (VRID) and an IP address. A router running
VRRP can participate in one or more virtual routers. The VRRP virtual router spans more than one
physical router, which allows multiple routers to provide redundant services to users.
VLAN
The term VLAN is used to refer to a collection of devices that communicate as if they are on the same
physical LAN. Any set of ports (including all ports on the switch) is considered a VLAN. LAN segments
are not restricted by the hardware that physically connects them. The segments are defined by flexible
user groups you create with the CLI.
VM
A virtual machine is a logical machine that runs on a VM server, which can host multiple VMs.
VMAN
In ExtremeXOS software, Virtual MANs are a bi-directional virtual data connection that creates a private
path through the public network. One VMAN is completely isolated from other VMANs; the
encapsulation allows the VMAN traffic to be switched over Layer 2 infrastructure. You implement VMAN
using an additional 892.1Q tag and a configurable EtherType; this feature is also known as Q-in-Q
switching.
VRRP
The Virtual Router Redundancy Protocol specifies an election protocol that dynamically assigns
responsibility for a
to one of the VRRP routers on a LAN. The VRRP router controlling
the IP address(es) associated with a virtual router is called the master router, and forwards packets sent
to these IP addresses. The election process provides dynamic failover in the forwarding responsibility
should the master router become unavailable. In case the master router fails, the virtual IP address is
mapped to a backup router's IP address; this backup becomes the master router. This allows any of the
virtual router IP addresses on the LAN to be used as the default first-hop router by end-hosts. The
advantage gained from using VRRP is a higher availability default path without requiring configuration
of dynamic routing or router discovery protocols on every host. VRRP is defined in RFC 2338.
WEP
Wired Equivalent Privacy is a security protocol for
WLAN (Wireless Local Area Network)
s defined in the
802.11b standard. WEP aims to provide security by encrypting data over radio waves so that it is
protected as it is transmitted from one end point to another.
WLAN
Wireless Local Area Network.
Glossary
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