SRX

It can do in following config to use multiple ip addresses for the same VLAN.

vlans {
    Vlan100 {
        vlan-id 100;
        l3-interface vlan.100;
    }
}
interfaces {
    ge-0/0/0 {
        unit 0 {
            family ethernet-switching {
                port-mode trunk;
                vlan {
                    members [ 10 20 ];
                }
            }
        }
    }
    ge-0/0/1 {
        unit 0 {
            family ethernet-switching {
                port-mode trunk;
                vlan {
                    members 100;
                }
            }
        }
    }
    vlan {
        unit 10 {
            family inet {
                address 172.16.10.1/24;
            }
        }
        unit 20 {
            family inet {
                address 172.16.20.1/24;
            }
        }
        unit 100 {
            family inet {
                address 192.168.0.1/24;
                address 192.168.0.2/24;
                address 192.168.0.3/24;
            }
        }
    }
}

However, it becomes an error to use each IP for every VRF.

routing-instances {
    VR01 {
        description Customer01;
        instance-type virtual-router;
        interface vlan.10;
        interface vlan.100;
    }
    VR02 {
        description Customer02;
        instance-type virtual-router;
        interface vlan.20;
        interface vlan.100;
    }
}

[edit routing-instances VR02 interface]
  'vlan.100'
    RT Instance: Interface vlan.100 already configured under instance VR01

What should I do to use the same VLAN by two or more VRF?

Hi,

Unfortunately there is no way you can use an interface in 2 differnet routing-instance VRs.

an interface can be part of one security zone and one virtual router.

However you can use same Ip in differnet routing-instances configured on different interfaces.

Regards,

Guru Prasad

Thank you for the rapid response.

> there is no way you can use an interface in 2 differnet routing-instance VRs.
Yes, understood.

> However you can use same Ip in differnet routing-instances configured on different interfaces.
I knew that this method enabled it

Because I want to use the same physics interface, I seem to use different ip.

config should be made as follows, but cannot do it.

vlans {
    Vlan100 {
        vlan-id 100;
        l3-interface vlan.100-1;
        l3-interface vlan.100-2;
    }
}