Unexpected Ethernet Behavior During Unified Issu; Arp Packets Briefly Not Sent Or Received; Link Aggregation Interruption; Port Data Rate Monitoring Halted - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SERVICE AVAILABILITY CONFIGURATION GUIDE 2010-10-08 Configuration Manual

JunosE 11.3.x Service Availability Configuration Guide
Related
Documentation

Unexpected Ethernet Behavior During Unified ISSU

ARP Packets Briefly Not Sent or Received

Link Aggregation Interruption

Port Data Rate Monitoring Halted

VLAN Statistics Monitoring Halts Unified ISSU Progress

Related
Documentation
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When the unified in-service software upgrade is completed, the DoS protection application
resumes attending to all dynamic state that was frozen at the beginning of the unified
ISSU process.
Some suspicious control flows might remain in a suspicious list based on your
configuration, if the upgrade software version has DoS protection classification algorithms
that are better or different than in the previous version. Because flows are discovered
and monitored at 1-second intervals, the new conditions might cause these flows to be
removed. You do not need to explicitly clear the flows when unified ISSU is completed.
Application Support for Unified ISSU on page 115
The following aspects of Ethernet behavior during a unified in-service software upgrade
are different than during normal router operations.
There is a brief period at the end of the upgrade phase when ARP packets are not sent
or received. This event can affect ARP entries on attached devices that were in the process
of being aged out.
During the unified in-service software upgrade, LACP PDUs are not generated or received
for about 15 seconds on Ethernet ports configured with LACP.
This interruption has no effect on the local side of the link because JunosE Software
generates LAC PDU packets every 30 seconds. The link is not declared down unless
packets are missed three times. LACP packet generation continues when the unified
ISSU operation is completed.
If a device on the other end of the link is configured with the short timeout, then the device
is likely to declare the link to be down and remove the link from the LAG bundle.
The monitoring of Ethernet port data rate is halted during a unified in-service software
upgrade. Monitoring resumes immediately after the unified ISSU operation is completed.
The data rates reported by the show interface command are inaccurate for the period
of one configured load interval after unified ISSU is completed.
A unified in-service software upgrade cannot proceed if VLAN statistics monitoring is in
progress.
Application Support for Unified ISSU on page 115
Copyright © 2010, Juniper Networks, Inc.