[j-nsp] Duplex settings for FastE ports

Sabri Berisha sabri at cluecentral.net
Fri Oct 12 05:23:55 EDT 2007


Hi,

> /xxxx at xxxx> show configuration interfaces fe-0/2/0
> description "";
> speed 100m;
> link-mode full-duplex;
> unit 0 {
>     family inet {
>         address xxx.xxx.xxx.xxx/30;
>     }
> }
> 
> xxxx at xxxx> show interfaces fe-0/2/0 media

>   Autonegotiation information:
>     Negotiation status: Incomplete

When you manually configure speed and duplex-mode on an FE-PIC,
auto-negotiation is automatically disabled. You will have to make sure
the other end is not trying auto-negotiation as well otherwise it will
revert back to half-duplex en you end up with a broken link.

On a side note: on a GE-PIC this behaviour is different:
auto-negotiation is not automatically disabled and you need to
explicitly configure this under gigether-options:

    ge-0/0/3 {
        description "cool link";
        speed 100m;
        link-mode full-duplex;
        gigether-options
        {
            no-auto-negotiation;
        }
        unit 0 {
            family inet {
                address 192.168.1.1/30;
            }
        }
    }

Thanks,

-- 
Sabri


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