[j-nsp] Duplex settings for FastE ports

[Dan Farrell]

Hi,

Can you explain how you were able to actually set your GE interface to
100Mbps? Is it only specific GE interfaces that allow 100Mbps settings?
I ask because we just got an M7i, and it is not possible to duplicate
the configuration you have below with our own ge-0/0/0.

Thanks,

danno

-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Sabri Berisha
Sent: Friday, October 12, 2007 5:24 AM
To: Kanagaraj Krishna
Cc: juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] Duplex settings for FastE ports

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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