Support Support Downloads Knowledge Base Case Manager My Juniper Community

Knowledge Base

Search our Knowledge Base sites to find answers to your questions.

Ask All Knowledge Base Sites All Knowledge Base Sites JunosE Defect (KA)Knowledge BaseSecurity AdvisoriesTechnical BulletinsTechnotes Sign in to display secure content and recently viewed articles

'no-auto-negotiation' option is set for a GigE interface, but it is still showing as autonegotiation

0

0

Article ID: KB28600 KB Last Updated: 14 Jan 2014Version: 1.0
Summary:

This article explains the reason why the no-auto-negotiation option for a copper Gigabit Ethernet interface appears to not be working.

Symptoms:

The 'no-auto-negotiation' option is configured for your GigE interface as follows, and it commits without a warning.

[edit]
root@srx# show interfaces ge-0/0/6
gigether-options {
     no-auto-negotiation;
}


However, the logs report the following:

Invalid parameter, ge-0/0/6, Auto-negotiation is mandatory for 1000BASE-TX.


Why did it commit without warning, if the parameter is invalid?

Cause:

In the current design, Junos OS is not able to block this specific interface configuration, i.e "no-auto-negotiation" in the CLI as there are various platforms, I/O cards and interface types. If the speed is 1G, autonegotiation will be enabled by default, regardless of your setting "no-auto-negotiation" under the interface configuration.

Solution:

To avoid the message "Invalid parameter, ge-0/0/6, autonegotiation is mandatory for 1000BASE-TX", remove the no-auto-negotiation option, as autonegotiation is enabled by default and cannot be changed.

Comment on this article > Affected Products Browse the Knowledge Base for more articles related to these product categories. Select a category to begin.

Getting Up and Running with Junos

Getting Up and Running with Junos Security Alerts and Vulnerabilities Product Alerts and Software Release Notices Problem Report (PR) Search Tool EOL Notices and Bulletins JTAC User Guide Customer Care User Guide Pathfinder SRX High Availability Configurator SRX VPN Configurator Training Courses and Videos End User Licence Agreement Global Search