Fujitsu PRIMERGY BX900 User Manual page 23

LLDP (Link Layer Discovery Protocol)
The LLDP is a vendor-neutral Layer 2 protocol that allows a network device to advertise its identity and
capabilities on the local network.
Called the IEEE 802.1AB Link Layer Discovery Protocol (LLDP), it is an emerging standard which
provides a solution for the configuration issues caused by expanding LANs. LLDP specifically defines a
standard method for Ethernet network devices such as switches, routers and wireless LAN access
points to advertise information about themselves to other nodes on the network and store the information
they discover. LLDP runs on all 802 media. The protocol runs over the data-link layer only, allowing two
systems running different network layer protocols to learn about each other.
CDP (Cisco Discovery Protocol)
CDP is a media- and protocol-independent protocol that runs on all Cisco-manufactured equipment
including routers, bridges, access and communication servers, and switches. Using CDP, users can
view information about all Cisco devices that are directly attached to the switch. In addition, CDP detects
native VLAN and port duplex mismatches.
Network management applications can retrieve the device type and SNMP-agent address of
neighboring Cisco devices using CDP. This feature enables applications to send SNMP queries to
neighboring devices. CDP allows network management applications to discover Cisco devices that are
neighbors of already known devices, in particular, neighbors running lower-layer, transparent protocols.
CDP runs on all media that support Sub-network Access Protocol (SNAP). CDP runs over the data link
layer only. Cisco devices never forward CDP packets. When new CDP information is received, Cisco
devices discard old CDP information. Ethernet Connection Blade supports the CDPv2 function with
switch function firmware.
sFlow
sFlowR® is the standard for monitoring high-speed switched and routed networks. sFlow technology is
built into network equipment and gives complete visibility into network activity, enabling effective
management and control of network resources.
The sFlow monitoring system consists of an sFlow Agent (embedded in a switch or router or in a
standalone probe) and a central sFlow Collector. The sFlow Agent uses sampling technology to capture
traffic statistics from the device it is monitoring. sFlow datagrams are used to immediately forward the
sampled traffic statistics to an sFlow Collector for analysis.
The sFlow Agent uses two forms of sampling: statistical packet-based sampling of switched or routed
Packet Flows, and time-based sampling of counters.
Packet Flow Sampling and Counter Sampling are performed by sFlow Instances associated with
individual Data Sources within the sFlow Agent. Packet Flow Sampling and Counter Sampling are
designed as part of an integrated system. Both types of samples are combined in sFlow datagrams.
Packet Flow Sampling will cause a steady, but random, stream of sFlow datagrams to be sent to the
sFlow Collector. Counter samples may be taken opportunistically in order to fill these datagrams.
In order to perform Packet Flow Sampling, an sFlow Sampler Instance is configured with a Sampling
Rate. The Packet Flow sampling process results in the generation of Packet Flow Records. In order to
perform Counter Sampling, the sFlow Poller Instance is configured with a Polling Interval, The Counter
Sampling process results in the generation of Counter Records.
The sFlow Agent collects Counter Records and Packet Flow Records and sends them in the form of
sFlow datagrams to sFlow Collectors.
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