7705 SAR Interfaces
354
Interface Configuration Guide
3HE 11011 AAAC TQZZA Edition: 01
The no form of this command disables autonegotiation on this port.
Default autonegotiate
cfm-loopback
Syntax cfm-loopback priority {low | high | dot1p} [match-vlan {vlan-range | none}]
no cfm-loopback
Context config>port>ethernet
config>port>dsl
config>port>gpon
Description This command enables the port to respond to LBM messages and sets the queuing and
scheduling conditions for handling CFM LBM frames. The user selects the desired QoS
treatment by enabling the CFM loopback and including the high or low priority with the high
or low keyword. The queue parameters and scheduler mappings associated with the high
and low keywords are preconfigured and cannot be altered by the user.
The priority dot1p and match-vlan keywords apply only to physical ring ports on the 2-port
10GigE (Ethernet) Adapter card and 2-port 10GigE (Ethernet) module.
The parameters and mappings have the following settings:
• for network egress, where profiled scheduling is the choice of scheduling:
Caution:
• Autonegotiation must not be disabled on an Ethernet port if the port is connected to an
MPR-e radio.
• For fiber SFP-based Gigabit Ethernet ports, it is recommended that autonegotiation be
enabled. If autonegotiation is disabled and the configured speed does not correctly
match the capability of the SFP, then the operational state of the link will remain down.
Attempting to configure a speed and duplex mode to 1000 Mb/s, half-duplex, is an
invalid combination and will be blocked from CLI.
• For RJ-45 interfaces, autonegotiation is mandatory for 1000Base-T operation (if
disabled, the behavior is undefined).
Note:
• If autonegotiation is turned off, the reception and transmission of IEEE 802.3x flow
control frames is enabled by default and cannot be disabled. For more information, see
Flow Control on Ethernet Ports.
• Ports belonging to a microwave link must have limited autonegotiation enabled before
the link can be added to a LAG.
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