How to properly configure vlans on juniper switches?

Question

Computer networks

There was a need to connect another switch to the network, but there was a problem.
There are two switches:
part of the config of the first switch

ge-0/1/0 {
        unit 0 {
            family ethernet-switching {
                port-mode trunk;
                vlan {
                    members all;
                }
            }
        }
    }
vlans {
    INET {
        vlan-id 4;
        interface {
            ge-0/0/3.0;
            ge-0/0/4.0;
            ge-0/0/5.0;
        }
    }

A thief switch with a factory configuration. I configure the same way as the first one, but the hosts do not ping each other.
Tell me, please, what could be the problem, maybe I forgot something?

Answer 1

but the hosts don't ping each other.

Should they? Maybe firewalls are configured on the hosts (windows 7 as an example)? Entries in arp-tables of hosts are created correctly?

maybe I forgot something?

Did you forget to apply the settings (commit)? What the commands show:

show vlans extensive
show interface ge-0/1/0
show interface ge-0/0/3
show interface ge-0/0/4
show interface ge-0/0/5

And please specify the connection diagram (which interfaces are used, which ones are in trunk mode, which ones are in access mode).