User manual JUNIPER NETWORKS SERVICE AVAILABILITY CONFIGURATION GUIDE V 11.1.X

[. . . ] JUNOSeTM Software for E SeriesTM Broadband Services Routers Service Availability Configuration Guide Release 11. 1. x Juniper Networks, Inc. 1194 North Mathilda Avenue Sunnyvale, California 94089 USA 408-745-2000 www. juniper. net Published: 2010-04-08 Juniper Networks, the Juniper Networks logo, JUNOS, NetScreen, ScreenOS, and Steel-Belted Radius are registered trademarks of Juniper Networks, Inc. in the United States and other countries. JUNOSe is a trademark of Juniper Networks, Inc. All other trademarks, service marks, registered trademarks, or registered service marks are the property of their respective owners. [. . . ] The line module is held down and prevented from rebooting until the service restoration phase is completed. The line module then undergoes a cold reboot to the running (post-upgrade) release. Hot swapping is disabled during the upgrade phase. The line module undergoes a cold reboot and hot swapping is reenabled when the service restoration phase is completed, The primary SRP module switches over to the standby SRP module. The standby SRP module reloads. A line module reloads. An IOA is hotswapped. Unified ISSU Upgrade Phase Overview 67 JUNOSe 11. 1. x Service Availability Configuration Guide Table 13: Router Response to Undesirable Events During the Upgrade Phase (continued) Event An application that does not support unified ISSU is configured. Router Action This event can take place only before the issu start command is issued, because that command disables CLI configuration commands. When you issue the issu start command, after configuring such an application, the command exits and generates an error message. Verifications of Requirements Because some time may have passed since unified ISSU verified the requirements for the upgrade during the initialization phase, unified ISSU reverifies all the same conditions. Unified ISSU also verifies that no CLI configuration sessions are open, that no scripts or macros are running, and that any SNMP requests or CLI commands in progress complete within 5 seconds. If any of the required conditions are not met, the CLI either exits the command with an error message or provides an informative message and prompts you to proceed or halt. When all the conditions are met, the CLI prompts you to proceed. If you continue, then you can subsequently halt the upgrade only by reloading the router. If you exit the command, the router remains in the unified ISSU initialized state. Upgrade Setup At this stage all the preconditions have been met. The unified ISSU process shuts down all management interfaces to the router in order to prevent changes in the configuration. Final preparation for the upgrade phase includes the following actions: SNMP--The SNMP agent generates a juniSystemIssuStateChange trap with juniSystemIssuState set to upgrading to indicate that the final phase of the operation has begun. When the trap is issued with this state value, the SNMP agent stops accepting any new SNMP gets or sets and does not issue any further traps. Only reload, show issu, and show version commands are available to you until the service restoration phase completes. These commands are available on the console and are not available to Telnet sessions. External events--Externally created events from sources other than the CLI are ignored. These events typically come from user connections, RADIUS servers, SRC software and SDX software, and SNMP, and include login requests, COA requests, multicast join requests, packet mirroring requests, and so on. Logout requests are cached and processed at a later stage. 68 Unified ISSU Upgrade Phase Overview Chapter 4: Configuring a Unified In-Service Software Upgrade Routing protocols--The unified ISSU process prompts you to consider raising the link costs for each routing protocol that is configured on the router. Raising the link cost for routes through the upgrading router enables neighbors to recompute better routes to those destinations. If you choose to raise the link cost, the higher costs can take some time to propagate through the network. Because the router is unable to determine when this has completed, it waits for 2 minutes before proceeding to the next step in the upgrade. [. . . ] If the status is disabled, the router does not control the state of the corresponding subinterface. SVLAN VLAN control-interface 142 Monitoring the Configuration of an ICR Partition Attached to an Interface Chapter 6: Managing Interchassis Redundancy Table 20: show icr-partition Output Fields (continued) Field Name vrrp-mac Field Description Configures the interface to use the default MAC address instead of the VRRP MAC address. If the status is enabled, the interface uses the VRRP MAC address; otherwise, the interface uses the default MAC address. Enables the interface to transmit GARP advertisments when the partition moves from backup state to master state. If the status is enabled, the interface transmits GARP advertisements; otherwise, the interface does not transmit GARP advertisements. advertise-mac Related Topics Configuring the Interface on Which the ICR Partition Resides on page 135 show icr-partition Monitoring the Configuration of ICR Partitions Purpose Action Display information about ICR partitions and their status. [. . . ]