Enabling a Timestamp for Ingress and Egress Queue Packets
Beginning with Junos OS Release 16.1, you can enable a packet timestamp feature to record the time at which the last packet is enqueued for CoS ingress and egress queues. Timestamps are enabled and reported per FPC. When the feature is enabled, the Packet Forwarding Engine begins collection the timestamp for all ingress and egress queue counters on the FPC. By default, packet timestamp information is not collected.
To activate packet timestamp collection for CoS ingress and egress queues:
Enable the timestamp on the desired FPC.
[edit chassis fpc slot-number traffic-manager] user@host# set packet-timestamp enable
When you enable or disable the packet timestamp for an FPC that is already up, the FPC is automatically rebooted when you commit the changes. The action takes effect when the FPC is back up.
For aggregated Ethernet interfaces, enable the packet timestamp on all FPCs that have an aggregated Ethernet leg. When you display the queue statistics for the interface, the timestamps for all the legs are shown.
The following commands display the collected timestamps in the Last-packet enqueued field:
show interfaces queue both-ingress-egress interface-nameshow interfaces queue interface-nameshow interfaces queue interface-name aggregate