Issu; Subscriber Statistics Accumulation Or Deletion; Unexpected Sonet And Sdh Behavior During Unified Issu - 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
Unexpected Suspension of Subscriber Login and Logouts During Unified ISSU

Subscriber Statistics Accumulation or Deletion

Related
Documentation

Unexpected SONET and SDH Behavior During Unified ISSU

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All new subscriber logins are ignored during the upgrade phase. New subscriber logouts
are cached and processed after the unified ISSU operation is completed.
All subscriber statistics present in the line modules are cleared when the line module
forwarding planes are upgraded. For this reason, the router has to read the statistics from
the forwarding plane before it is upgraded.
However, forwarding through the line modules continues after that point, until the line
module forwarding plane is upgraded. Some statistics can therefore accumulate in the
forwarding plane in the interval between these two events. These statistics are not
preserved across the upgrade.
Statistics for subscribers that log out during the forwarding plane upgrade are collected
and reported before the forwarding plane is reloaded. Statistics are not collected for any
subscribers who are connected before you issue the issu start command but who log
out before the forwarding plane upgrade is completed.
The following subscriber statistics are preserved across the upgrade:
All policy statistics
Accounting statistics reported by IP: in bytes, out bytes, in packets, out packets
Accounting statistics reported by L2TP: in octets, out octets, in packets, out packets
Accounting statistics reported by PPP: in octets, out octets, in packets, out packets
All other statistics are set to zero, including all statistics belonging to the SNMP generic
interface MIB for every interface layer.
Application Support for Unified ISSU on page 115
During a unified in-service software upgrade, several aspects of SONET behavior differ
from normal operation.
SONET APS is supported only for non-channelized APS IOAs.
During a unified in-service software upgrade, if you have configured APS functionality
on the non-channelized APS IOAs, the unified ISSU process fails and a warning message
is displayed. If you have not configured APS functionality, the unified ISSU process
succeeds and the line modules (OC3/OC12) do not get rebooted.
NOTE: The unified ISSU process for the channelized APS IOAs has not
been modified. The channelized APS IOAs are rebooted during a unified
in-service software upgrade.
Copyright © 2010, Juniper Networks, Inc.