Managing And Tracing Bfd Sessions During Unified Issu Procedures - Juniper EX9200 Features Manual

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Managing and Tracing BFD Sessions During Unified ISSU Procedures

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Copyright © 2017, Juniper Networks, Inc.
Example: Performing a Unified ISSU on page 188
Troubleshooting Unified ISSU Problems on page 227
Understanding the Unified ISSU Process
Unified ISSU System Requirements on page 161
Managing and Tracing BFD Sessions During Unified ISSU Procedures on page 215
Bidirectional Forwarding Detection (BFD) sessions temporarily increase their detection
and transmission timers during unified ISSU procedures. After the upgrade, these timers
revert to the values in use before the unified ISSU started. The BFD process replicates
the unified ISSU state and timer values to the backup Routing Engine for each session.
No additional configuration is necessary to enable unified ISSU for BFD. However, you
can disable the BFD timer negotiation during the unified ISSU by including the
no-issu-timer-negotiation
[edit protocols bfd]
no-issu-timer-negotiation;
If you include this statement, the BFD timers maintain their original values during unified
ISSU.
CAUTION: The BFD sessions might flap during unified ISSU or Routing Engine
switchover, depending on the detection intervals.
For more information about BFD, see the Junos OS Routing Protocols Library.
To configure unified ISSU trace options for BFD sessions, include the
the [edit protocols bfd traceoptions flag]
[edit protocols]
bfd {
traceoptions {
flag issu;
}
}
Getting Started with Unified In-Service Software Upgrade on page 159
Understanding the Unified ISSU Process
Unified ISSU System Requirements on page 161
Best Practices for Performing a Unified ISSU on page 183
Example: Performing a Unified ISSU on page 188
Verifying a Unified ISSU on page 214
Troubleshooting Unified ISSU Problems on page 227
statement at the
[edit protocols bfd]
hierarchy level.
Chapter 17: Performing a Unified ISSU
hierarchy level.
statement at
issu
215