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Taking too much time for failover in Juniper EX4200-24T

[ Edited ]
01.19.11   |  
‎01-19-2011 01:32 AM
Hello guys, We have 2 Nos. Juniper EX4200-24T in the virtual Chassis. we are testing switches failover by powering-Off. when we are powering-off primary switch at that time it takes bit more time to take over another switch, around 20 to 25 RTO & same in vice-versa condition. Is there any configuration, where we can reduce the failover time. Thank you, Shrikant Desai.
5 REPLIES
Ethernet Switching

Re: Taking too much time for failover in Juniper EX4200-24T

[ Edited ]
01.19.11   |  
‎01-19-2011 02:37 AM

Hi

You should configure virtual-chassis like this:

set chassis redundancy graceful-switchover

I reduced failover to 7-8 second with this

 

you can then check with this command if v-c is ready to transfer mastership (routing engine) between routing engine and backup routing engine (whether they are synchronized). In operating mode:

request chassis routing-engine master switch check 

 

there are also other subcommands in request chassis routing-engine master

 

 

Ethernet Switching

Re: Taking too much time for failover in Juniper EX4200-24T

07.11.13   |  
‎07-11-2013 05:51 AM

Warning if you are NOT at JunOS 12.2, this command will DO the failover!

 

request chassis routing-engine master switch check

On JunOS 12.1, the option CHECK is not supported, hence without syntax error, Junos will DO the failover.

 

Ethernet Switching

Re: Taking too much time for failover in Juniper EX4200-24T

07.11.13   |  
‎07-11-2013 10:17 AM

Make sure you are running Junos 12.1 or above with NSSU and have the following configuration:

 

set chassis redundancy graceful-switchover
set ethernet-switching-options nonstop-bridging
set routing-options nonstop-routing
set virtual-chassis no-split-detection

 

Also make sure both roles are routing-engines (show virtual-chassis).

Regards,
Tero S
Ethernet Switching

Re: Taking too much time for failover in Juniper EX4200-24T

07.16.13   |  
‎07-16-2013 02:12 AM

I'm running 12.2R2.5 and still this command causes the REs to failover, without any query before Smiley Sad

Ethernet Switching

Re: Taking too much time for failover in Juniper EX4200-24T

09.06.14   |  
‎09-06-2014 08:47 AM

Hi all,

 

I can confirm that even in version 12.3R2.5 the "check" option causes a RE failover without question.

 

- Onno

- Onno

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