Routing

Hi I cannot type command "show vlan" in MX960 in any mode. Any one can give some suggestion? Thank you

The vlan hierarchy is only on the SRX and EX series devices.  On the MX we use bridge domains and the vlan id attribute on interfaces for layer 2 configurations.

http://www.juniper.net/documentation/en_US/junos15.1/topics/concept/layer-2-bridge-domain-environment-overview-mx-solutions.html

Thank you so much for your reply. Do we have some commands to show vlan status for MX960? 

The functional equivalent command would be 

show bridge domain

http://www.juniper.net/documentation/en_US/junos14.1/topics/reference/command-summary/show-bridge-domain-command.html

Here is a fuller description of layer 2 configuration examples on the MX series for reference.

http://www.juniper.net/documentation/en_US/junos15.1/topics/example/layer-2-bridge-domain-environment-example-mx-solutions.html

Thank you so much for your reply. The router has vlan. please see below. but when I enter command show bidge damain, it shows nothing. Maybe I did something wrong? 

xe-1/0/0.10 up up aenet --> ae1.10
xe-1/0/0.17 up up aenet --> ae1.17

Hard to tell from the partial output, but it would appear your system is using the alternative method for vlan assignment, configuring directly on the interface.  In Juniper gear you can create the bridge doman/vlan and assign interfaces to this.  Or you can directly assign vlan tags to the sub interface.

And in your case there may also be a physical interface versus ae bundle too.  Typically here you assign the physical interface to the ae bundle then configure the sub interface parameters on the ae logical interface.

to have a look at the interface vlan id setup use 

show configuration interface ae1

This is such a weird caveat as now the only way to check the VLAN assignment is from the configuration itself.

But hey, it works.