I'm trying to connect a QFX10008 to an EX4300 switch using a Passive DAC as uplink port and not as vcp.
I already found out that the default behavior for a 4x40G pic in the EX4300 is configured as VCP
I removed the VCP ports and configured et port, and show interfaces shows the port as up | down from the EX4300.
QFX10K - 15.1X53-D33.3
show chassis hardwareXcvr 10 REV 740-038625 QSFP+-40G-CU5M
show interfaces et-0/0/10Physical interface: et-0/0/10, Enabled, Physical link is DownLink-level type: Ethernet, MTU: 1514, LAN-PHY mode, Speed: 40Gbps, BPDU Error: None, MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Disabled, Media type: Fiber Device flags : Present Running Down
EX4300 - 14.1X53-D35.3
show chassis hardwarePIC 1 REV 19 BUILTIN BUILTIN 4x 40GE QSFP+ Xcvr 0 REV 740-038625 QSFP+-40G-CU5M
email@example.com> show interfaces et-0/1/0Physical interface: et-0/1/0, Enabled, Physical link is DownLink-level type: Ethernet, MTU: 1514, MRU: 0, Speed: 40Gbps, BPDU Error: None, MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Enabled, Remote fault: Online,
Do I need to configure additional settings on the port?
Disable autonegotiation on both sides--this is the only way we can get our 4300's and QFX to link over 40Gb DAC.
You're right, this is the solution indeed.
Trying it couple of hours after posting this question only at the 4300 end solved the issue.
Thanks a dozan