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Force 10 - Link connectivity for DAC (Twinax) cables on Force 10 switches.

Summary: How to resolve connectivity issues with DAC (Twinax) cables.

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Article Content


Symptoms


Article summary: This article explains how to resolve connectivity issues with DAC (Twinax) cables.


 

When using DAC (Direct attached copper, also known as Twinax) cables, you may run into link connectivity issues when not using cr4 auto negotiation. This is resolved by enabling cr4 auto negotiation, which is not enabled by default. The example below shows how to do this on interface 37 on unit 0, and then saves the configuration.

Ftos>enable

Ftos#config

Ftos(config)#interface fortyGigE 0/37

Ftos(config-if-fo-0/37)#intf-type cr4 autoneg

Ftos(config-if-fo-0/37)#end

Ftos#write memory

Note: This command is only applicable on Forty-Gigabit Ethernet interfaces.

To remove the above configuration run the following command in the interface configuration.

Ftos(config-if-fo-0/37)#no intf-type cr4 autoneg

Article Properties


Affected Product

PowerSwitch S4810P, PowerSwitch S5000, Force10 S60-44T, PowerSwitch S6000, Force10 Z9000, Dell Networking Z9500

Last Published Date

21 Feb 2021

Version

3

Article Type

Solution