Interface Configuration Guide 7705 SAR Interfaces
Edition: 01 3HE 11011 AAAC TQZZA 353
Default no unshaped-sap-cir
Parameters cir-rate — the CIR rate for the aggregate of all the unshaped 4-priority SAPs on the port
Values 0 to 100000000 kb/s, or max
Default 0 kb/s
autonegotiate
Syntax autonegotiate [limited]
no autonegotiate
Context config>port>ethernet
Description For the 8-port Ethernet Adapter card, this command enables speed autonegotiation and
duplex autonegotiation on Ethernet 10/100Base-T RJ-45 ports. The command enables
speed autonegotiation on the two SFP ports (10, 100, or 1000 Mb/s). Duplex autonegotiation
is only supported on SFP ports using 100 Mb/s fiber SFPs or 10/100/1000Base-T copper
SFPs. Duplex autonegotiation is not supported on optical Gigabit Ethernet SFPs; the mode
is always full duplex.
The 8-port Gigabit Ethernet Adapter card, 10-port 1GigE/1-port 10GigE X-Adapter card in
x10-1gb-sfp mode, and Packet Microwave Adapter card support speed autonegotiation and
duplex autonegotiation on all SFP ports. Each port can run in full-duplex mode or in half-
duplex mode at 10 or 100 Mb/s.
The 6-port Ethernet 10Gbps Adapter card and the 7705 SAR-X support speed
autonegotiation and duplex autonegotiation on all SFP ports; SFP+ ports do not support
autonegotiation. Each SFP port can run in full-duplex mode or half-duplex mode at 10 Mb/s
or 100 Mb/s, and in full-duplex mode at 1 Gb/s. Each SFP+ port can run in full-duplex mode
at 10 Gb/s.
Speed autonegotiation takes place automatically — all ports are configured for speed
autonegotiation by default. Speed autonegotiation might need to be disabled (for example, if
a port must be forced to a certain speed or to avoid speed negotiation loops between the
Ethernet Adapter card and other devices). To turn off speed autonegotiation for a port, the
user configures the port speed manually.
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. Also, when
autonegotiation is disabled, the tx and rx pauses are enabled automatically (the tx and rx
pauses are negotiated with the far end if autonegotiation is enabled).
If the autonegotiate limited keyword option is specified, the port will autonegotiate but will
only advertise a specific speed and duplex mode. The speed and duplex mode advertised
are the settings configured for the port. One use for limited mode is for multispeed gigabit
ports to force gigabit operation while keeping autonegotiation enabled for compliance with
IEEE 801.3.
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