Nokia 7705 SAR - Page 374

7705 SAR Interfaces
374
Interface Configuration Guide
3HE 11011 AAAC TQZZA Edition: 01
phy-tx-clock
Syntax [no] phy-tx-clock {auto-pref-master | auto-pref-slave | slave | master}
Context config>port>ethernet
Description This command configures the 1000Base-T physical layer transmit clock. The mode affects
the establishment of the master-slave relationship between two ports sharing a link segment
during auto-negotiation. The master port uses a local clock to determine the timing of
transmitter operations. The slave port recovers the clock from the signal it receives and uses
the signal to determine the timing of transmitter operations. For ports that do not support
1000Base-T, the value defaults to N/A and cannot be changed.
The phy-tx-clock configuration is supported on SFP ports whether or not the SFP is inserted.
The phy-tx-clock command applies only to copper-based RJ-45 synchronous Ethernet
ports. The command can be used on an SFP port that supports fiber and copper, but the
command has no effect if a fiber SFP is installed.
The proper value must be set to ensure that the synchronous Ethernet clock relay is correctly
configured. See the 7705 SAR Basic System Configuration Guide for more information about
synchronous Ethernet.
Default The default value for the MWA 1000Base-T Ethernet ports on the Packet Microwave Adapter
card is master. On other adapter cards, the default value is auto-pref-slave for ports that
support 1000Base-T Ethernet connections. The default value is n/a for ports that do not
support 1000Base-T Ethernet connections.
Parameters auto-pref-master — prefers to be master during autonegotiation
auto-pref-slave — prefers to be slave during autonegotiation
slave — forces the port to be the slave clocking source
master — forces the port to be the master clocking source
poe
Syntax poe [plus]
no poe
Context config>port>ethernet
Description The poe command enables an RJ-45 or RJ point five port that is Power over Ethernet (PoE)
capable to deliver power to a “Powered Device” at levels compatible with the IEEE 802.3af
standard.
The poe plus command enables an RJ-45 or RJ point five port that is PoE+ capable to deliver
power to a “Powered Device” at levels compatible with the IEEE 802.3at standard.