rcp-count
Syntax
rcp-count number;
Description
(QFX5100 Virtual Chassis or Virtual Chassis Fabric
[VCF] only) Optionally override the default algorithm that defines
the number of parallel rcp sessions used
for copying the new software image to member switches in a Virtual
Chassis or VCF for nonstop software upgrade (NSSU).
You can upgrade the software running on all members of a Virtual
Chassis or VCF using NSSU. At the beginning of the upgrade process,
NSSU uses rcp to copy the new software
from the primary switch to each of the member switches. Starting in
Junos OS Release 14.1X53-D40, to minimize the time to copy the files
to all members, NSSU uses parallel rcp sessions
to copy the software to multiple members at the same time, rather
than copying sequentially to each member in turn.
By default, the number of parallel rcp sessions that NSSU launches at a time follows an algorithm that
optimizes the transfer time based on the total number of members in
the Virtual Chassis or VCF, so that the new software is transferred
to about half the members in parallel up to a maximum of 8 members
at one time. After the first set of parallel copy operations are complete,
NSSU launches the next set of parallel copy operations, and so on
as needed until all members are updated.
Although the default value is usually optimal, you can configure
the rcp-count statement to set a specific value for the
number of parallel copy sessions instead. For example, you might want
to use a lower number of parallel sessions to avoid potential impact
on Virtual Chassis or VCF forwarding activity during NSSU.
After copying the new software to all members using as many
parallel rcp sessions as needed, the NSSU
process continues by rebooting each member with the new software in
sequence, starting with the member in the backup Routing Engine role.
If copying the new software to any member fails, NSSU terminates the upgrade process for the entire Virtual Chassis or VCF, logs the error condition, and initiates an error recovery measure to remove the new software from the members to which it was already transferred.
Options
number |
Number of parallel |
Required Privilege Level
interface—To view this statement in the configuration.interface-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 14.1X53-D40.