 | Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |
At this point, the upgrade release is preserved on each line module in some backup region. When signaled by the active SRP module, all supported line modules simultaneously reload and restart with the new release. Forwarding through the forwarding subsystem on the line modules—through the fabric of the system—is not be affected by the reload.
The line modules then simultaneously recover any application data preserved in memory on the line module and upgrade that data into a format that is understood by the applications running on the new release. This operation can take in the range of 1–10 minutes depending on the size of the data and the upgrade path of the data. Each line module restores its operational state, running the new release with all data upgraded to a version acceptable to the new software.
If the upgrade process fails for any line module, that module undergoes a cold restart, but none of the other line modules is affected.
| Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |