Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) - Manual (Page 1068)

1012 Brocade 6910 Ethernet Access Switch Configuration Guide
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Connectivity Fault Management
• Two-Way – The local MEP generates frames with DM information, sending the specified
number of frames to its peer MEP in the same MA, and waits to receive DM frames back
from it.
When two-way frame delay measurement are made, the transmitting MEP sends a frame
with DM request information with the TxTimeStampf (Timestamp at the time of sending a
frame with DM request information), and the receiving MEP responds with a frame with
DM reply information with TxTimeStampf copied from the DM request information,
RxTimeStampf (Timestamp at the time of receiving a frame with DM request information),
and TxTimeStampb (Timestamp at the time of transmitting a frame with DM reply
information):
Frame Delay = (RxTimeStampb-TxTimeStampf)-(TxTimeStampb-RxTimeStampf)
The MEP can also make two-way frame delay variation measurements based on its ability
to calculate the difference between two subsequent two-way frame delay measurements.
• Group Index – Index for a group of delay-measure messages attributes. (Range: 1-200)
To change the binding for a MEP, delay-measure messages must be disabled.
• Target – The destination MEP for periodically transmitted delay-measure messages:
• MEP ID – The identifier of a remote MEP that is the target of the delay-measure message.
(Range: 1-8191)
• MAC Address – MAC address of a remote MEP that is the target of the delay-measure
message. This must be the unicast address. A multicast MAC address cannot be used.
This address can be entered in either of the following formats: xx-xx-xx-xx-xx-xx or
xxxxxxxxxxxx
Interface
To configure a delay-measure attribute group:
1. Click Administration, CFM.
2. Select Configure Periodic Delay Measure from the Step list.
3. Select Add Group from the Action list.
4. Set the attributes for periodic delay-measure message transmission.
5. Click Apply.
FIGURE 305 Configuring a Delay-Measure Attribute Group