Interface Configuration
7750 SR Interface Configuration Guide Page 395
Parameters port-scheduler-policy-name — Specifies an existing port-scheduler-policy configured in the config>qos
context.
autonegotiate
Syntax autonegotiate [limited]
no autonegotiate
Context config>port>ethernet
Description This command enables speed and duplex autonegotiation on Fast Ethernet ports and enables far-end fault
indicator support on gigabit ports.
There are three possible settings for autonegotiation:
• “on” or enabled with full port capabilities advertised
• “off” or disabled where there are no autonegotiation advertisements
• “limited” where a single speed/duplex is advertised.
When autonegotiation is enabled on a port, the link attempts to automatically negotiate the link speed and
duplex parameters. If autonegotiation is enabled, the configured duplex and speed parameters are ignored.
When autonegotiation is disabled on a port, the port does not attempt to autonegotiate and will only operate
at the speed and duplex settings configured for the port. Note that disabling autonegotiation on gigabit ports
is not allowed as the IEEE 802.3 specification for gigabit Ethernet requires autonegotiation be enabled for
far end fault indication.
If the autonegotiate limited keyword option is specified the port will autonegotate but will only advertise a
specific speed and duplex. The speed and duplex advertised are the speed and duplex settings configured
for the port. One use for limited mode is for multispeed gigabit ports to force gigabit operation while keep-
ing autonegotiation enabled for compliance with IEEE 801.3.
SR OS requires that autonegotiation be disabled or limited for ports in a Link Aggregation Group to guaran-
tee a specific port speed.
The no form of this command disables autonegotiation on this port.
Default autonegotiate
Parameters limited — The Ethernet interface will automatically negotiate link parameters with the far end, but will only
advertise the speed and duplex mode specified by the Ethernet speed and duplex commands.
dot1q-etype
Syntax dot1q-etype 0x0600..0xffff
no dot1q-etype
Context config>port>ethernet
Description This command specifies the Ethertype expected when the port's encapsualtion type is dot1q. Dot1q encapsu-
lation is supported only on Ethernet interfaces.
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