Hi ronf,
I have re-configured it to use ae0 and ae1, it seems same thing for me.
But I noticed that on the EX side, the ae interfaces showing physical link is down:
root@EX3300> show interfaces ae0
Physical interface: ae0, Enabled, Physical link is Down
Interface index: 128, SNMP ifIndex: 600
Link-level type: Ethernet, MTU: 1514, Speed: Unspecified, BPDU Error: None,
MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled,
Flow control: Disabled, Minimum links needed: 1, Minimum bandwidth needed: 0
Device flags : Present Running
Interface flags: Hardware-Down SNMP-Traps Internal: 0x4000
Current address: 64:64:9b:f6:74:43, Hardware address: 64:64:9b:f6:74:43
Last flapped : 2014-11-23 00:48:11 GMT (01:32:02 ago)
Input rate : 0 bps (0 pps)
Output rate : 0 bps (0 pps)
{master:0}
root@EX3300> show interfaces ae1
Physical interface: ae1, Enabled, Physical link is Down
Interface index: 129, SNMP ifIndex: 601
Link-level type: Ethernet, MTU: 1514, Speed: Unspecified, BPDU Error: None,
MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled,
Flow control: Disabled, Minimum links needed: 1, Minimum bandwidth needed: 0
Device flags : Present Running
Interface flags: Hardware-Down SNMP-Traps Internal: 0x4000
Current address: 64:64:9b:f6:74:44, Hardware address: 64:64:9b:f6:74:44
Last flapped : 2014-11-23 00:48:11 GMT (01:32:08 ago)
Input rate : 0 bps (0 pps)
Output rate : 0 bps (0 pps)