HP 6125G HP 6125G & 6125G/XG Blade Switches High Availability Configur - Page 25

LT, Protocols and standards, CFD configuration task list

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Depending on whether the source MEP can receive a loopback reply message (LBR) from the target MEP, the link state between the two can be verified. LBM frames and LBR frames are unicast frames. LT LT is similar to traceroute. It identifies the path between the source MEP and the target MP. This function is implemented in the following way-the source MEP sends the linktrace messages (LTMs) to the target MP. After receiving the messages, the target MP and the MIPs that the LTM frames pass send back linktrace reply messages (LTRs) to the source MEP. Based on the reply messages, the source MEP can identify the path to the target MP. LTM frames are multicast frames and LTRs are unicast frames. Protocols and standards • IEEE 802.1ag, Virtual Bridged Local Area Networks Amendment 5: Connectivity Fault Management CFD configuration task list For CFD to operate properly, design the network by performing the following tasks: • Grade the MDs in the entire network and define the boundary of each MD. • Assign a name for each MD. Make sure the same MD has the same name on different devices. • Define the MA in each MD according to the VLAN you want to monitor. • Assign a name for each MA. Make sure the same MA in the same MD has the same name on different devices. • Determine the MEP list of each MA in each MD. Make sure devices in the same MA maintain the same MEP list. • At the edges of MD and MA, MEPs should be designed at the device port. MIPs can be designed on devices or ports that are not at the edges. Tasks Enabling CFD Configuring the CFD protocol version Configuring basic CFD Configuring settings service instances Creating a service instance with the MD name Creating a service instance without the MD name Configuring MEPs Configuring MIP generation rules Configuring CFD functions Configuring CC on MEPs Configuring LB on MEPs Configuring LT on MEPs Remarks Required. Optional. Required. Perform either task. Required. Required. Required. Optional. Optional. Typically, a port blocked by the spanning tree feature cannot receive or send CFD messages except in the following cases: • The port is configured as an outward-facing MEP. 18

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18
Depending on whether the source MEP can receive a loopback reply message (LBR) from the target MEP,
the link state between the two can be verified. LBM frames and LBR frames are unicast frames.
LT
LT is similar to traceroute. It identifies the path between the source MEP and the target MP. This function
is implemented in the following way—the source MEP sends the linktrace messages (LTMs) to the target
MP. After receiving the messages, the target MP and the MIPs that the LTM frames pass send back
linktrace reply messages (LTRs) to the source MEP. Based on the reply messages, the source MEP can
identify the path to the target MP. LTM frames are multicast frames and LTRs are unicast frames.
Protocols and standards
•
IEEE 802.1ag,
Virtual Bridged Local Area Networks Amendment 5: Connectivity Fault
Management
CFD configuration task list
For CFD to operate properly, design the network by performing the following tasks:
•
Grade the MDs in the entire network and define the boundary of each MD.
•
Assign a name for each MD. Make sure the same MD has the same name on different devices.
•
Define the MA in each MD according to the VLAN you want to monitor.
•
Assign a name for each MA. Make sure the same MA in the same MD has the same name on
different devices.
•
Determine the MEP list of each MA in each MD. Make sure devices in the same MA maintain the
same MEP list.
•
At the edges of MD and MA, MEPs should be designed at the device port. MIPs can be designed
on devices or ports that are not at the edges.
Tasks
Remarks
Configuring basic CFD
settings
Enabling CFD
Required.
Configuring the CFD protocol version
Optional.
Configuring
service instances
Creating a service instance
with the MD name
Required.
Perform either task.
Creating a service instance
without the MD name
Configuring MEPs
Required.
Configuring MIP generation rules
Required.
Configuring CFD
functions
Configuring CC on MEPs
Required.
Configuring LB on MEPs
Optional.
Configuring LT on MEPs
Optional.
Typically, a port blocked by the spanning tree feature cannot receive or send CFD messages except in the
following cases:
•
The port is configured as an outward-facing MEP.