JUNOS Internet Software Network Operations Guide: Hardware
506 ! Replacing a Redundant Routing Engine
The following command output displays when you switch the mastership from the
backup to the master Routing Engine:
root@m20-host-0> request chassis routing-engine master switch
warning: Traffic will be interrupted while the PFE is re-initialized
Toggle mastership between routing engines ? [yes,no] (no) yes
Resolving mastership...
Complete. The local routing engine becomes the master.
root@m20-host-0>
What It Means The command output indicates that traffic will be interrupted during the Routing
Engine mastership switch process. The command output confirms whether you
really want to continue with the mastership switch process, and indicates when the
mastership switch process is complete.
Syntax request chassis routing-engine master <acquire <no-confirm>| release | switch>
acquire
—(Optional) Attempt to become the master Routing Engine.
no-confirm—(Optional) Do not request confirmation.
release—(Optional) Request the other Routing Engine to become the master.
switch—(Optional) Toggle mastership between Routing Engines.
Replacing a Redundant Routing Engine
If you have a router with two Routing Engines and you want to shut the power off to
the router or remove a Routing Engine, you must first halt the backup Routing
Engine (if it has been upgraded), then halt the master Routing Engine. To halt a
Routing Engine, issue the
request system halt command. You can also halt both
Routing Engines at the same time by issuing the
request system halt
both-routing-engines
command.
Action To replace a redundant Routing Engine, see “Removing a Routing Engine” on
page 161.
NOTE: When you halt both Routing Engines, a message displays to press Enter to
restart or to halt. If you press Enter on the master Routing Engine to restart, it will
restart. However the backup Routing Engine will not restart. It will wait at the
message to restart or to halt. You then have to press Enter on the console of the
backup Routing Engine for it to restart.
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