Troubleshooting Bandwidth Oversubscription; Managing Flash Cards On Srp Modules; Flash Features - Juniper SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X Configuration Manual

JUNOSe 11.1.x System Basics Configuration Guide

Troubleshooting Bandwidth Oversubscription

If you enter a forbidden combination of line modules or exceed the slot group
bandwidth when you have not configured bandwidth oversubscription, you will see
an error message.
For example, suppose you originally configure the router for bandwidth
oversubscription and then want to change to full line rate performance. You forget
to remove line modules or disable slots, and enter the no bandwidth
oversubscription command. The following message appears:
To resolve the problem, remove the unwanted line modules, or disable the slots that
contain those line modules.

Managing Flash Cards on SRP Modules

Each SRP module contains a flash card that stores system files. On the E120 and
E320 routers, each SRP module can have an additional flash card; the second card
is reserved for the storage of core dumps.
In this documentation, the flash card on the primary SRP module is referred to as
the primary flash card; the flash card on the redundant SRP module is referred to as
the redundant flash card.
If you have two SRP modules installed in a router, you can use flash cards of different
capacities on the SRP modules. The effective capacity of the higher-capacity flash
card equals that of the lower-capacity flash card.

Flash Features

The software contains a number of features that optimize the way the router restores
its configuration if it is shut down improperly:
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Managing Flash Cards on SRP Modules
Bandwidth oversubscription is currently not in effect.
Bandwidth oversubscription will be in effect the next time the system
reboots.
See show bandwidth oversubscription.
host1(config)#no bandwidth oversubscription
% failed : bandwidth over subscribed at slot 0-2
The router tracks improper shutdowns.
After an improper shutdown, the router runs an investigation of the file allocation
table (FAT) the next time it reboots.
The router creates backups of critical files.
When you install a new flash card or restart the router after shutting it down
incorrectly, a utility scans the flash card to detect corrupt sectors. If the utility
finds files or directories that contain corrupt sectors, it removes the files and
directories, because they can no longer be used. The utility also fixes problems