Unified Issu Protocol Support For M Series, Mx Series, And T Series Routers And Ex9200 Switches; Unified Issu Feature Support - Juniper EX9200 Features Manual

High Availability Feature Guide for EX9200 Switches
Unified ISSU Protocol Support for M Series, MX Series, and T Series Routers and EX9200
Switches

Unified ISSU Feature Support

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To find out which releases support ISSU, please use the
the Juniper Networks website. The ISSU Feature Explorer tool contains information about
the Juniper Networks devices that support ISSU, the releases that support ISSU for each
device, and the SKUs that support ISSU for each release.
NOTE: To gain access to the ISSU Feature Explorer tool, you need to log in
with a customer or partner account on the Juniper Networks website. For
more information on setting up a Juniper Networks account, please see the
Juniper Networks Guide to Creating a User Account
Unified ISSU supports most Junos OS features starting in Junos OS Release 9.0. However,
the following constraints apply:
Link Aggregation Control Protocol (LACP)—Link changes are not processed until after
the unified ISSU is complete.
NOTE: When you configure the unified ISSU feature on the T4000 Core
Router, you can also configure LACP. However, LACP periodic fast mode
is not supported. If you configure LACP periodic transmission, set it to slow
mode at both sides before initiating a unified ISSU. If fast mode is
configured, the configuration can be committed without any commit or
system log error messages, but you might notice that a larger than expected
amount of traffic drops because of the LACP links going down during a
unified ISSU.
NOTE: LACP is not supported on the PTX5000 and PTX 3000 routers
during a unified ISSU.
Automatic Protection Switching (APS)—Network changes are not processed until
after the unified ISSU is complete.
Ethernet Operation, Administration, and Management (OAM) as defined by IEEE
802.3ah and by IEEE 802.1ag—When a Routing Engine switchover occurs, the OAM
hello message times out, triggering protocol convergence.
Ethernet circuit cross-connect (CCC) encapsulation—Circuit changes are not processed
until after the unified ISSU is complete.
Logical systems—On devices that have logical systems configured on them, only the
master logical system supports unified ISSU.
ISSU Feature Explorer tool on
.
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