Interlogix NS3502-8P-2S User Manual User Manual
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IFS NS3502-8P-2S User Manual
557
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MAC Table
Switching of frames is based upon the DMAC address contained in the frame. The switch builds
up a table that maps MAC addresses to switch ports for knowing which ports the 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 frame with the corresponding SMAC address has been seen after a configurable age
time.
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.