Im looking at a unicast flood that occured and analysing it retrospectivley with graphing.
2 x ex4550s running 12.x junos with a trunk between them.
sw1 and sw2 both have hosts in VLAN 2 .
An unkown unicast flood occured for approx 10 mins and maxed out the links for all vlan 2 members on sw2, which would indicate it was received over the trunk from sw1 as this link was unaffected.
All vlan 2 members on sw1 were also unaffeceted, no change ingress or egress.
The odd thing is there is no increase ingress on any link on sw1 or sw2 and no loop anywhere. Its as if the unkown unicast is recevied by sw2 from sw1 then amplified out to every vlan2 member .
Nothing in the logs on either switch and no STP changes.
Any possible explanation for what appears to be a self generated unicast flood by the switch?