Upgrading The Software For A Routing Matrix - Juniper JUNOS OS 10.4 - RELEASE NOTES Release Note

Upgrade and Downgrade Instructions for Junos OS Release 10.4 for M Series, MX Series, and T Series Routers
Copyright © 2010, Juniper Networks, Inc.
NOTE: To maintain a loopback address for a specific instance, configure
a loopback address value that does not match the main instance address
( ).
lo0.0
For more information about configuring the draft-rosen Multicast VPN feature, see the
Junos OS Multicast Configuration Guide.

Upgrading the Software for a Routing Matrix

A routing matrix can use either a TX Matrix router as the switch-card chassis (SCC) or a
TX Matrix Plus router as the switch-fabric chassis (SFC). By default, when you upgrade
software for a TX Matrix router or a TX Matrix Plus router, the new image is loaded onto
the TX Matrix or TX Matrix Plus router (specified in the Junos OS CLI by using the
option) and distributed to all T640 routers or T1600 routers in the routing matrix
sfc
(specified in the Junos OS CLI by using the
the upgrade, ensure the following conditions before beginning the upgrade process:
A minimum of free disk space and DRAM on each Routing Engine. The software upgrade
will fail on any Routing Engine without the required amount of free disk space and
DRAM. To determine the amount of disk space currently available on all Routing Engines
of the routing matrix, use the CLI
amount of DRAM currently available on all the Routing Engines in the routing matrix,
use the CLI
show chassis routing-engine
The master Routing Engines of the TX Matrix or TX Matrix Plus router (SCC or SFC)
and T640 routers or T1600 routers (LCC) are all re0 or are all re1.
The backup Routing Engines of the TX Matrix or TX Matrix Plus router (SCC or SFC)
and T640 routers or T1600 routers (LCC) are all re1 or are all re0.
All master Routing Engines in all routers run the same version of software. This is
necessary for the routing matrix to operate.
All master and backup Routing Engines run the same version of software before
beginning the upgrade procedure. Different versions of the Junos OS can have
incompatible message formats especially if you turn on GRES. Because the steps in
the process include changing mastership, running the same version of software is
recommended.
For a routing matrix with a TX Matrix router, the same Routing Engine model is used
within a TX Matrix router (SCC) and within a T640 router (LCC) of a routing matrix.
For example, a routing matrix with an SCC using two RE-A-2000s and an LCC using
two RE-1600s is supported. However, an SCC or an LCC with two different Routing
Engine models is not supported. We suggest that all Routing Engines be the same
model throughout all routers in the routing matrix. To determine the Routing Engine
type, use the CLI show chassis hardware | match routing command
For a routing matrix with a TX Matrix Plus router, the SFC contains two model
RE-DUO-C2600-16G Routing Engines, and each LCC contains two model
RE-DUO-C1800-8G Routing Engines.
lcc option). To avoid network disruption during
show system storage command. To determine the
command.
or
scc
.
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