nx.os.and.cisco.nexus.switching.2nd.edition.1587143046

Local clock time:Sun May 6 03:21:16 2012
N7K-1-Agg1#
The next step would be to enable PTP on specific interfaces where devices configured to
use PTP reside.
Note
On the Nexus 7000, only F1, F2, F2e, and M2 interfaces can be configured with PTP.
Only the Nexus 5500 series switches support PTP.
Example 7-57 illustrates enabling PTP on an interface.
Example 7-57. Enabling PTP on an Interface
Click here to view code image
N7K-1(config)# int e4/24
N7K-1(config-if)# ptp
N7K-1(config-if)# show ptp port int e4/24
PTP Port Dataset: Eth4/24
Port identity: clock identity: 00:26:98:ff:fe:0f:d9:c2
Port identity: port number: 791
PTP version: 2
Port state: Disabled
Delay request interval(log mean): 2
Announce receipt time out: 3
Peer mean path delay: 0
Announce interval(log mean): 1
Sync interval(log mean): 2
Delay Mechanism: End to End
Peer delay request interval(log mean): 0
N7K-1(config-if)#
IEEE 802.3az (Energy Efficient Ethernet)
With the increasing focus on energy usage in data centers, the IEEE has created a new
standard that enables devices to negotiate lower power consumption during idle periods.
This is specified in the IEEE 802.3az standard and is referred to as Energy Efficient
Ethernet (EEE). EEE enables end stations to signal in-band via Link Pulse Idle (LPI) frames
when there is no traffic to be sent. When EEE devices receive this LPI, they know they can
reduce the amount of power used by the port. If traffic needs to be sent across the link, the
devices send a wakeup signal and buffer data until the link is ready to traffic. Using EEE can
significantly reduce the power required during idle periods by up to 18 percent.
The Nexus 7000 switch has support for IEEE 802.3az on the F2e copper module (N7K-