We have EX3400 with JUNOS 18.2R3-S1.7 vesion virtual chassis configuation.
on port ge-1/0/12 i saw that port link mode is half duplex. i tried to hard core full duplex and commit the config but still its showing link mode half duplex. please suggest how can i configure full duplex. Their is no ethernet cable connected on interface.
--> switch1# set interfaces ge-1/0/12 link-mode full-duplex
switch1#show interfaces ge-1/0/12Physical interface: ge-1/0/12, Enabled, Physical link is DownInterface index: 814, SNMP ifIndex: 630Link-level type: Ethernet, MTU: 1514, LAN-PHY mode, Link-mode: Half-duplex, Speed: 100mbps, Duplex: Full-Duplex, BPDU Error: None, Loop Detect PDU Error: None,Ethernet-Switching Error: None, MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Disabled, Auto-negotiation: Enabled,Remote fault: Online, Media type: Copper, IEEE 802.3az Energy Efficient Ethernet: Disabled, Auto-MDIX: Enabled
I hope you are doing great!
One question if you connect a computer on the port, does it continue working at 100mb half duplex?
Hi Target .
I hope you're doing well.
It is working as per chipset design for this platform, in which the default value is 0which maps to half-duplex when the interface is down, once you have a physical link, it should change to full-duplex
If this solves your problem, please mark this post as "Accepted Solution" so we can help others too.
@Target and others - Just FYI but today, EX3400 does not actually support 10/100 HDX, only FDX. HDX support is coming in a soon to be released SW version. I know 18.2R3-S3 will/should include this support. This SW release is due out early April, I believe.
Again FYI Only.
This is normal behavior, it will show up properly as full duplex once you connect the link.
By default Junos shows interfaces that appear down as half-duplex. I'll try to find a kb and post it, but this is just because when the interface is shown DOWN the duplex setting will apear as half.
I have handy an EX4300, look at the samples.. for an interface up the duplex shows full, while the other half duplex, i can confirm that both interfaces have the same configuration
Model: ex4300-24pJunos: 18.1R3.3
root@EX-DESTINATION# run show interfaces extensive ge-1/0/0Physical interface: ge-1/0/0, Enabled, Physical link is UpInterface index: 698, SNMP ifIndex: 564, Generation: 192Link-level type: Ethernet, MTU: 8014, LAN-PHY mode, Link-mode: Full-duplex,Speed: Auto, BPDU Error: None, Loop Detect PDU Error: None,
root@EX-DESTINATION# run show interfaces extensive ge-1/0/1Physical interface: ge-1/0/1, Enabled, Physical link is DownInterface index: 699, SNMP ifIndex: 565, Generation: 193Link-level type: Ethernet, MTU: 1514, LAN-PHY mode, Link-mode: Half-duplex,Speed: Auto, BPDU Error: None, Loop Detect PDU Error: None,
root@EX-DESTINATION# run show configuration interfaces | display setset interfaces ge-1/0/0 mtu 8014set interfaces ge-1/0/0 unit 0 family ethernet-switching interface-mode trunkset interfaces ge-1/0/0 unit 0 family ethernet-switching vlan members allset interfaces ge-1/0/1 mtu 8014set interfaces ge-1/0/1 unit 0 family ethernet-switching interface-mode trunkset interfaces ge-1/0/1 unit 0 family ethernet-switching vlan members all
Has this changed to full-duplex when you connected the host to the port?