Hi All
Should be a stupid question, but I'm confused with the way autonegotiation works in Junos. On one side (mxA-1), I have
ge-1/1/2 {
unit 0 {
family inet {
address 172.18.112.1/30;
}
}
}
while on the other (mxA-2),
ge-1/1/2 {
speed 10m;
unit 0 {
family inet {
address 172.18.112.2/30;
}
}
}
On both sides, autonegotiation is enabled,
lab@mxA-1> show interfaces ge-1/1/2 detail | match Auto
Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Enabled, Remote fault: Online
lab@mxA-2> show interfaces ge-1/1/2 detail | match Auto
Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Enabled, Remote fault: Online
But the link is down. It goes up if I delete "10m" setting from one side or put "10m" also on the other. The devices are MX80's with Juniper SFP-T and Junos 11.2R6.3 but it does not seem to depend on version.
I do not understand why autonegotiation is in fact not working. Is it by design?