Hi Faisal.
Welcome on J-Net forums. Let me try to assist you. I unfortunatelly don't have access to any EX4500s now (last touched them nearly 5 years ago).
faisal.bargoob@sipcom.com wrote:
Since then the switch always try to logging to Master "Connection to master failed, enabling local login", This happen only on first time login after restart.
login: root
Logging to master
...
Connection to master failed, enabling local loginI dont know is this is a normal bebaviour on Junos: 15.1R6.7?
There is nothing to be worried about - it is normal as far as I can tell. The console and out-of-band connections in virtual chassis mode are meant to be "handed over" to switch with master role in virtual chassis. The device is after short time doing login via "local" member. I can't provide detailed explanation to behavior though.
Questions:
1) If the switch in VC mode how can change to Standalone mode?
The command "request chassis pic-mode intraconnect" followed by device reboot shall revert the EX4500 to Standalone mode per documentation below:
https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/ex4500-standalone-reset-cli.html
Additionally it might be needed to revert any SFP+ ports (10G) configured as Virtual Chassis Ports (VCPs) to normal network port before that by running operational mode command "request virtual-chassis vc-port delete pic-slot X port Y " (replace X and Y by actual PIC and port numbers). And to delete configuration branch [edit virtual-chassis] - configuration mode command "delete virtual-chassis" from top of hierarchy.
The newer EX models show all the time "Enabled" for VC mode (show virtual-chassis status) unless you switch them to Mixed mode or VC Fabric mode as far as I can recall.
2) In Junos: 15.1R6.7 release is it normal behaviour or if 2 switches are connected on 10G interface will this try to form a VC ?
The two EX4500 switches will try to form VC over 10G interfaces if you explicitly configure 10G interfaces for VCP mode ("request virtual-chassis vc-port set pic-slot X port Y") on both devices. The 10G interfaces (SFP+ ports) are not enabled for VCP mode on EX4500 by default (see documentation).
Hopefully someone can add more details to question 1). Your fellow Juniper SE or JTAC can provide additional help as well.
Regards