====== Juniper SRX Layer 2 transperent mode configruration ======
SRX base on JUNOS, so SRX L2 mode will use [[http://www.juniper.net/techpubs/software/junos-security/junos-security95/junos-security-swconfig-interfaces-and-routing/understand-irb-section.html#understand-irb-section|Integrated Routing and Bridging Interfaces(aka irb)]] to work.

===== Requirements =====
  * From JUNOS 11.1, Layer 2 transparent mode support is available on all SRX platforms.
    * SRX100, SRX210, SRX220, SRX240, and SRX650. 
  * Before JUNOS 11.1, Only SRX3400, SRX3600, SRX5600, and SRX5800 support it.

===== Basic Config =====
<code>
interfaces {
    ge-0/0/0 {
        unit 0 {
            family bridge {
                interface-mode access;
                vlan-id 10;
            }
        }
    }
    ge-0/0/7 {
        unit 0 {
            family bridge {             
                interface-mode access;
                vlan-id 10;
            }
        }
    }
    irb {
        unit 0 {
            family inet {
                address 172.27.186.63/24;
            }
        }
    }
}
routing-options {
    static {
        route 0.0.0.0/0 next-hop 172.27.186.1;
    }
}
security {
    policies {
        from-zone trust to-zone untrust {
            policy 1 {
                match {
                    source-address any;
                    destination-address any;
                    application any;
                }
                then {
                    permit;
                    log {
                        session-init;
                        session-close;
                    }
                }
            }
        }
    }
    log {
        mode stream;
        format sd-syslog;
        source-address 172.27.186.63;
        stream test {
            host {
                172.27.186.57;
            }
        }
    }
    zones {
        security-zone untrust {
            interfaces {
                ge-0/0/0.0 {            
                    host-inbound-traffic {
                        system-services {
                            dhcp;
                            tftp;
                            all;
                        }
                    }
                }
            }
        }
        security-zone trust {
            host-inbound-traffic {
                system-services {
                    all;
                }
            }
            interfaces {
                ge-0/0/7.0;
            }
        }
    }
}
bridge-domains {
    test {
        domain-type bridge;
        vlan-id 10;
        routing-interface irb.0;
    }
}
</code>