[j-nsp] GE/10GE link-mode config on M/T-series has no effect

[Samuel GAY]

Hi,

Recently I have been confronted to the same problem on a J4350.
Here was the answer : 
http://www.juniper.net/techpubs/software/junos/junos85/swconfig85-network-interfaces/id-12174099.html#id-12174099

There is a mistake on this page. You can read :

"Note: For Gigabit Ethernet interfaces installed in J4350 and J6350 
Services Routers, when you manually configure either the link mode or 
speed settings, the system ignores the configuration and generates a 
system log message. When you configure both the link mode and speed, the 
link negotiates the user-specified link mode and speed settings if 
autonegotiation is disabled. *When autonegotiation is enabled and you 
specify the link mode and speed, the link autonegotiates with your 
manually configured settings.* If you disable autonegotiation and do not 
manually configure the link mode and the speed, the link is negotiated 
at 1000 Mbps full duplex."


JTAC will proceed to this change :

"Note: For Gigabit Ethernet interfaces installed in J4350 and J6350 
Services Routers, when you manually configure either the link mode or 
speed settings, the system ignores the configuration and generates a 
system log message. When autonegotiation is enabled and you specify the 
link mode and speed, the link autonegotiates with your manually 
configured settings. *When autonegotiation is _disabled_ and you 
configure both the link mode and speed, the link operates with your 
manually configured settings.* If you disable autonegotiation and do not 
manually configure the link mode and the speed, the link operates at 
1000 Mbps full duplex."

The configuration is :

ge-0/0/1 {
    speed 100m;
    link-mode full-duplex;
*    gigether-options {
        no-auto-negotiation;
    }*
    unit 0 {
        family inet {
            address 10.0.0.1/24;
        }
    }
}

May be it could help you.

Regards,
Samuel
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