7705 SAR Interfaces
92
Interface Configuration Guide
3HE 11011 AAAC TQZZA Edition: 01
− there is no associated MEP creation involved with this feature; therefore, no
domain, association, or similar checks are performed on the received frame
− upon finding a destination address MAC match, the LBM frame is sent to
the CFM process
• CFM loopback support on a physical ring port on the 2-port 10GigE (Ethernet)
Adapter card or 2-port 10GigE (Ethernet) module differs from other Ethernet
ports. For these ports, cfm-loopback is configured, optionally, using dot1p and
match-vlan to create a list of up to 16 VLANs. The null VLAN is always applied.
The CFM Loopback Message will be processed if it does not contain a VLAN
header, or if it contains a VLAN header with a VLAN ID that matches one in the
configured match-vlan list.
• received LBM frames undergo no queuing or scheduling in the ingress direction
• at egress, loopback reply (LBR) frames are stored in their own queue; that is, a
separate new queue is added exclusively for LBR frames
• users can configure the way a response frame is treated among other user traffic
stored in network queues; the configuration options are high-priority, low-priority,
or dot1p, where dot1p applies only to physical ring ports
• for network egress, where profiled scheduling is enabled, the following
conditions apply:
− high-priority: either cir = port_speed, which applies to all frames that are
scheduled via an in-profile scheduler; or round-robin (RR) for all other
(network egress queue) frames that are in-profile
− low-priority: either cir = 0, pir = port_speed, which applies to all frames that
are scheduled as out-of-profile, or RR for all other frames that are
out-of-profile
• for network egress or access egress, where 4-priority scheduling is enabled:
− high-priority: either cir = port_speed, which applies to all frames that are
scheduled via an expedited in-profile scheduler, or RR for all other (network
egress queue) frames that reside in expedited queues and are in an
in-profile state
− low-priority: either cir = 0, pir = port_speed, which applies to all frames that
are scheduled via a best effort out-of-profile scheduler, or RR for all other
frames that reside in best-effort queues and are in an out-of-profile state
• for the 8-port Gigabit Ethernet Adapter card, the 10-port 1GigE/1-port 10GigE
X-Adapter card, and the v-port on the 2-port 10GigE (Ethernet) Adapter card and
2-port 10GigE (Ethernet) module, for network egress, where 16-priority
scheduling is enabled:
− high-priority: has higher priority than any user frames
− low-priority: has lower priority than any user frames
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