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BLADE OS 5.1 Release Notes
BMD00098, December 2009 11
Uni-Directional Link Discovery Protocol
BLADEOS 5.1 now supports the Uni-Directional Link Discovery (UDLD) protocol, compliant
with RFC 5171. UDLD operates at Layer 2 in conjunction with existing IEEE 802.3 Layer 1 fault
detection mechanisms. It is used between peer devices to detect and disable unidirectional Ethernet
links caused, for instance, by mis-wired cable strands, interface malfunctions, or media converter
faults.
UDLD is configured on a per-port basis. It is disabled by default. The UDLD configuration menu is
available using the following CLI command:
Operation/Administration/Maintenance Protocol
BLADEOS 5.1 now supports IEEE 802.3ah Operation, Administration, and Maintenance (OAM)
protocol. OAM allows the switch to detect faults on physical port links. Using OAM, if the Local
Information that a port sends does not match the Remote Information received, the link is
determined to be in an anomalous condition and is automatically disabled.
OAM is configured on a per-port basis. It is disabled by default. The OAM configuration menu is
available using the following CLI command:
sFlow Monitoring
BLADEOS 5.1 now supports sFlow technology for monitoring traffic in data networks. The switch
software includes an embedded sFlow agent which can be configured on a per-port basis to sample
network traffic and provide continuous statistical report information to a central sFlow analyzer.
sFlow features are disabled by default, but may be configured using the following menu:
# /cfg/port <x>/udld
# /cfg/port <x>/oam
# /cfg/sys/sflow