User manual

User Manual
Publication date: Feb., 2013
Revision A3
270
frames should go to (based upon the DMAC address in the frame). This table contains both
static and dynamic entries. The static entries are configured by the network administrator if
the administrator wants to do a fixed mapping between the DMAC address and switch ports.
The frames also contain a MAC address (SMAC address), which shows the MAC address of
the equipment sending the frame. The SMAC address is used by the switch to automatically
update the MAC table with these dynamic MAC addresses. Dynamic entries are removed
from the MAC table if no frames with the corresponding SMAC address have been seen after
a configurable age time.
MEP
MEP is an acronym for Maintenance Entity Endpoint and is an endpoint in a Maintenance
Entity Group (ITU-T Y.1731).
MD5
MD5 is an acronym for Message-Digest algorithm 5. MD5 is a message digest algorithm,
used cryptographic hash function with a 128-bit hash value. It was designed by Ron Rivest in
1991. MD5 is officially defined in RFC 1321 - The MD5 Message-Digest Algorithm.
Mirroring
For debugging network problems or monitoring network traffic, the switch system can be
configured to mirror frames from multiple ports to a mirror port. (In this context, mirroring a
frame is the same as copying the frame.)
Both incoming (source) and outgoing (destination) frames can be mirrored to the mirror port.
MLD
MLD is an acronym for Multicast Listener Discovery for IPv6. MLD is used by IPv6 routers to
discover multicast listeners on a directly attached link, much as IGMP is used in IPv4. The
protocol is embedded in ICMPv6 instead of using a separate protocol.
MVR
Multicast VLAN Registration (MVR) is a protocol for Layer 2 (IP)-networks that enables
multicast-traffic from a source VLAN to be shared with subscriber-VLANs.
The main reason for using MVR is to save bandwidth by preventing duplicate multicast
streams being sent in the core network, instead the stream(s) are received on the MVR-VLAN
and forwarded to the VLANs where hosts have requested it/them (Wikipedia).
N
NAS
NAS is an acronym for Network Access Server. The NAS is meant to act as a gateway to
guard access to a protected source. A client connects to the NAS, and the NAS connects to
another resource asking whether the client's supplied credentials are valid. Based on the
answer, the NAS then allows or disallows access to the protected resource. An example of a
NAS implementation is IEEE 802.1X.
NetBIOS
NetBIOS is an acronym for Network Basic Input/Output System. It is a program that allows
applications on separate computers to communicate within a Local Area Network (LAN), and
it is not supported on a Wide Area Network (WAN).
The NetBIOS giving each computer in the network both a NetBIOS name and an IP address
corresponding to a different host name, provides the session and transport services described
in the Open Systems Interconnection (OSI) model.
NFS
NFS is an acronym for Network File System. It allows hosts to mount partitions on a remote