OK so I started fresh on new Cisco port Gi0/51
Here is the results
On Cisco side the port is configured in such a way
interface GigabitEthernet0/51 switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate
On Juniper side the port is configured in that way
ge-0/0/26 {
speed 1g;
ether-options {
no-auto-negotiation;
}
unit 0 {
family ethernet-switching {
interface-mode trunk;
vlan {
members [ 1 999 ];
}
}
}Effect is that:
- when I connect Cisco switch to other Cisco switch (with trunk configured) the port goes up and LED is going amber and later green (which is expected behavior)
Now using the same cable.
- when I connect Cisco switch to Juniper on Cisco side the port is just dead (LED completely off), what is interesting on Juniper side the LEDs are on, the left one is stable green which mieans according to documentation that Link is established but there is no link activity, and right one is blinking green which means that 1 Gig transceiver is inserted and the the is established.
So why the hell on Cisco side it is completely dead ??
This is really ridiculuos case.