Juniper JUNOSE 11.3, Configuration Manual

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Replacing IOAs on the E120 Router and the E320 Router
When you configure an IOA in an IOA bay on the E120 and E320 routers, the router stores
the configuration in NVS.
When you replace an IOA that supports hot-swapping with the same type of IOA, the
line module goes online immediately. When you replace an IOA that
does no t support
hot-swapping with the same type of IOA, the line module reboots.
Before you install an IOA that was previously occupied by another IOA in the E120 or E320
router—for example, an ES2-S1 GE-4 IOA in an IOA bay that previously contained an
ES2-S1 OC3-8 STM1 ATM IOA—consider whether the IOA that you are replacing supports
hot-swapping. For example:
• When you replace an IOA that does not support hot-swapping, the line module reboots.
Before installing the different type of IOA, issue the
adapter erase or slot erase
command for the slot that contains the IOA bay.
• When you replace an IOA that supports hot-swapping, the line module becomes
inactive with a “ mismatch” state. After installing the different type of IOA, issue the
adapter accept command or the slot erase command for the slot that contains the
IOA bay.
Replacing SRP Modules and SFMs
If you remove a standby SRP module or an SFM, you must issue the slot erase command
to delete the configuration. If you fail to issue the slot erase command, then the E Series
router cannot guarantee that the SRP modules were synchronized. In this situation, the
E Series router does not properly execute a simple
reload command.
To reload the router you must do either of the following:
• Issue the reload force command.
•
Issue the slot erase command followed by the reload command.
If you perform one of the following actions, you must reset the configuration of the router
to factory default:
•
Replace a 5-Gbps SRP module with a 10-Gbps SRP module or vice versa.
• Transfer an SRP module from an ERX7xx router to a Juniper Networks ERX1410 router
or vice versa.
You cannot use the slot accept command to force the router to accept the new SRP
module.
When you have installed the SRP module in the new location, reset the configuration of
the router to factory defaults as follows:
1.
Reload the operating router, then press mb key sequence (case-insensitive) during
the countdown.
355 Copyright © 2010, Juniper Networks, Inc.
Chapter 6: Managing Modules