JDS Uniphase IP Video Test Option HST-3000, Руководство пользователя

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Chapter 3 Ethernet Testing
OAM service and link layer testing
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HST-3000 Ethernet Testing User’s Guide
OAM service and link layer testing
You can position the instrument at various endpoints in a
Maintenance Domain (MD) or Maintenance Association (MA)
area to verify that no trunk problems occur per ITU-T Rec.
Y.1731 and IEEE 802.1ag.
You can also use the HST to verify point-to-point link layer
performance per IEEE 802.3ah.
When using your instrument for service layer OAM testing,
you can do the following:
– Specify the Maintenance Domain (MD) level, Mainte-
nance Entity Group (MEG) End Point IDs, and Mainte-
nance Association (MA) IDs.
– Specify the Continuity Check Message (CCM) transmis-
sion rate.
– Specify the CCM and LBM address types (Unicast or
Multicast) when running non-MAC-in-MAC applications.
– Specify thresholds for declaring a loss of continuity (LOC)
if the number of consecutive missing CCM exceeds the
number of messages expected within the calculated
interval. This state may be used by Maintenance End
Point devices to initiate a switch to a protect line.
When using your instrument for link layer OAM testing, you
can also do the following:
– Discover an OAM peer, and automatically detect its capa-
bilities.
– Indicate whether you want the instrument to serve in an
active or passive role.
– Specify the Vendor OUI (Organizationally Unique Identi-
fier) for the instrument.
– Indicate whether the instrument will advertise that it
provides unidirectional support for failure detection,
remote loopback, link events, and variable retrieval.
– Indicate whether you want the instrument to generate link
faults, dying gasps, and critical events.