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Wavelength is 1310nm
QSFP28 receive power reading is 0.3507dBm
Interface index is 2102796
For information about which optics and transceivers are supported, contact your Dell representative.
Splitting 100G Ports
The platform supports splitting a single 100G QSFP 28 port into any of the following ports:
● Two 50G ports
● Four 25G ports
● One 40G port
● Four 10G ports
NOTE: You can use the supported breakout cables (for a list of supported cables, refer to the Installation Guide or the
Release Notes).
To split a single 100G port into 50G, 25G, 40G, and 10G ports, use the following commands:
● Split a 100G port into two 50G ports.
CONFIGURATION Mode
stack-unit stack-unit-number port number portmode dual speed 50G
○ stack-unit-number: enter the stack member unit identifier of the stack member to reset.
○ number: enter the port number of the 100G port to be split. The range is from 1 to 32.
● Split a 100G port into four 25G ports.
CONFIGURATION Mode
stack-unit stack-unit-number port number portmode quad speed 25G
○ stack-unit-number: enter the stack member unit identifier of the stack member to reset.
○ number: enter the port number of the 100G port to be split. The range is from 1 to 32.
● Split a 100G port into one 40G ports.
CONFIGURATION Mode
stack-unit stack-unit-number port number portmode single speed 40G
○ stack-unit-number: enter the stack member unit identifier of the stack member to reset.
○ number: enter the port number of the 100G port to be split. The range is from 1 to 32.
● Split a 100G port into four 10G ports.
CONFIGURATION Mode
stack-unit stack-unit-number port number portmode quad speed 10G
○ stack-unit-number: enter the stack member unit identifier of the stack member to reset.
○ number: enter the port number of the 100G port to be split. The range is from 1 to 32.
Link Dampening
Interface state changes occur when interfaces are administratively brought up or down or if an interface state changes.
Every time an interface changes a state or flaps, routing protocols are notified of the status of the routes that are affected by
the change in state. These protocols go through the momentous task of re-converging. Flapping; therefore, puts the status of
entire network at risk of transient loops and black holes. Dampening limits the notification of status to the routing protocols.
Link dampening minimizes the risk created by flapping by imposing a penalty (1024) for each interface flap and decaying the
penalty exponentially based on the half-time. When the accumulated penalty exceeds a certain threshold (suppress threshold),
the interface is put in an Error-Disabled state and for all practical purposes of routing, the interface is deemed to be “down.”
After the interface becomes stable and the penalty decays below a certain threshold (reuse threshold), the interface comes up
again and the routing protocols re-converge.
You configure link dampening using the dampening [[[[half-life] [reuse-threshold]] [suppress-
threshold]] [max-suppress-time]] command on the interface.
Following is the detailed explanation of interface state change events:
Interfaces
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