Руководство По Устранению Ошибки для Cisco Cisco Tunnel Terminating Gateway (TTG)
Understanding System Operation and Configuration
Understanding the System Boot Process ▀
Cisco ASR 5000 Series System Administration Guide ▄
OL-22970-01
Step 1
When power is first applied to the chassis, or after a reboot, only the SMC slots (slots 8 and 9) receive power.
Therefore, the SMCs are the first cards to boot and their LEDs are the first to light up. After the system confirms that
cards are located in slots 8 and 9, power is quickly applied to the SPIOs in slots 24 and 25.
Therefore, the SMCs are the first cards to boot and their LEDs are the first to light up. After the system confirms that
cards are located in slots 8 and 9, power is quickly applied to the SPIOs in slots 24 and 25.
Step 2
During the startup process, each card performs a series of power-on self tests (POSTs) to ensure that the hardware is
operational.
operational.
Step 3
If the SMC in slot 8 successfully executes all POSTs, the card in slot 8 becomes the active SMC. The SMC in slot 9
becomes the standby card. If there is a problem with the SMC in slot 8, the card in slot 9 becomes the active SMC.
Once the active and standby order is determined, the SPIO cards in slots 24 and 25 are placed into active and standby
mode, as determined by the direct mapping of the active and standby SMCs.
becomes the standby card. If there is a problem with the SMC in slot 8, the card in slot 9 becomes the active SMC.
Once the active and standby order is determined, the SPIO cards in slots 24 and 25 are placed into active and standby
mode, as determined by the direct mapping of the active and standby SMCs.
Step 4
The active SMC begins loading the operating system software image designated in the boot stack. The boot stack
entries are contained in the boot.sys file that resides on the SMC CompactFlash. The standby SMC observes the active
card startup. If the file on the active card is loads normally, the standby SMC boots from the active card image. If the
active SMC experiences problems during this phase, the standby card loads its software image designated by its own
boot stack entry in its boot.sys file and takes over control of the system as the active card.
entries are contained in the boot.sys file that resides on the SMC CompactFlash. The standby SMC observes the active
card startup. If the file on the active card is loads normally, the standby SMC boots from the active card image. If the
active SMC experiences problems during this phase, the standby card loads its software image designated by its own
boot stack entry in its boot.sys file and takes over control of the system as the active card.
Step 5
After the software image is loaded into SMC RAM, the active card determines whether other cards are installed in the
chassis by applying power to the other chassis slots and signalling them. If the chassis slot contains an application or
line card, power is left on to that slot. All empty slots are powered off.
chassis by applying power to the other chassis slots and signalling them. If the chassis slot contains an application or
line card, power is left on to that slot. All empty slots are powered off.
I
MPORTANT
:
If no SMCs are installed, or if they are installed incorrectly, no other card installed in the system will
boot.
Step 6
When power is applied to the PSCs and line cards installed in the system, they each perform their own series of POSTs.
Step 7
After successful POST, each of the PSCs enter the standby mode.
Installed line cards all remain in a ready mode until their corresponding PSC is made active via configuration. After the
PSC is made active, the line card installed in the upper-rear chassis slot behind the card is also made active. The line
card installed in the lower-rear chassis slot behind the card enters the standby mode.
PSC is made active, the line card installed in the upper-rear chassis slot behind the card is also made active. The line
card installed in the lower-rear chassis slot behind the card enters the standby mode.
Step 8
After entering the standby mode, each of the PSC control processors (CPs) communicate with the SMC to receive the
appropriate code.
appropriate code.
Step 9
Upon successful loading of the software image, the system loads a configuration file designated in the boot stack
(boot.sys file). If this is the first time the system is powered on and there is no configuration file, the active SMC
invokes the system‘s Quick Setup wizard. Use the Quick Setup wizard to configure basic system parameters for
communication across the management network.
(boot.sys file). If this is the first time the system is powered on and there is no configuration file, the active SMC
invokes the system‘s Quick Setup wizard. Use the Quick Setup wizard to configure basic system parameters for
communication across the management network.
The wizard creates a configuration file, system.cfg, that you can use as a starting point for subsequent configurations.
This allows you to configure the system automatically by applying the configuration file during any subsequent boot.
For additional information about system configuration files, refer to the Understanding Configuration Files section.
This allows you to configure the system automatically by applying the configuration file during any subsequent boot.
For additional information about system configuration files, refer to the Understanding Configuration Files section.