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Change in the behavior when modifying the SFP+ uplink module operating mode (PIC-mode)

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Article ID: KB18014 KB Last Updated: 04 Mar 2017Version: 2.0
Summary:
In Junos release 10.0 or earlier when the PIC-mode is changed from 10G to 1G, or vice versa, a warning message displays during the commit. The message states a reboot is required for the changes to take effect. This behavior has changed in Junos 10.1 and later releases.
Symptoms:
In Junos release 10.0 or earlier when the PIC-mode is changed from 10G to 1G, or vice versa, a reboot is required (see sample below).  This behavior has changed in Junos 10.1 and later releases.

root@Juniper3# set chassis fpc 0 pic 1 sfpplus pic-mode 1g

{master:0}[edit]
root@Juniper3# commit
[edit chassis fpc 0 pic 1]
'sfpplus'
warning: sfpplus pic-mode change will only be applied after reboot of member 0
configuration check succeeds
commit complete
Solution:
A reboot is not required for Junos 10.1 or later releases unless and until any port on an SFP+ uplink module has been configured as a Virtual Chassis port; at that point the change in operating mode will take effect the next time the switch is rebooted.


The message is displayed regardless of SFP+ uplink module port configuration.

For example:
{master:1}[edit]
user@ex4200-24p-12# set chassis fpc 0 pic 1 sfpplus pic-mode 1g
[edit]
'juniper-config'
warning: If any port in this pic is used as vc-port, sfpplus pic-mode change will only be applied after reboot of the fpc; otherwise no reboot required.
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