The service-provider style configuration you are using for the interface bridge configuration may not work if you are not receiving tagged frames. If you configure an interface for tagging in the following manner, but receive untagged frames, those will be dropped and recorded in the "Input Packet Reject"
et-5/1/2 {
vlan-tagging;
encapsulation extended-vlan-bridge;
unit 1600 {
vlan-id 1600;
}
"If non-tagged packets are entering an interface, which is configured with a VLAN, they will be dropped. To verify, examine the output of show interface <interface-name> extensive. All packets will be rejected and reflect in the filter statistics. However, the Input DA rejects and Input SA rejects counters will not increment. The L2 channel errors counter will also not increment. If L2 channel errors are incrementing, it indicates that the packets are tagged with a vlan-id, which is not configured on the interface."
From this KB article -
https://kb.juniper.net/InfoCenter/index?page=content&id=KB12923
For what you are trying to accomplish, consider using the following config interface configuration -
interfaces {
et-5/1/2 {
flexible-vlan-tagging;
native-vlan-id 1600;
encapsulation flexible-ethernet-services;
unit 1600 {
encapsulation vlan-bridge;
}
}
}
et-5/1/5 {
flexible-vlan-tagging;
native-vlan-id 1600;
encapsulation flexible-ethernet-services;
unit 1600 {
encapsulation vlan-bridge;
vlan-id 1600;
}
}
}
Let me know if this works and if you see "input packet reject".
Details on Input Packet Rejects -
Receive and Transmit statistics reported by the PIC's MAC address filter subsystem. The filtering is done by the content-addressable memory (CAM) on the PIC. The filter examines a packet's source and destination MAC addresses to determine whether the packet may enter the system or be rejected.
- Input packet count—Number of packets received from the MAC hardware that the filter processed.
- Input packet rejects—Number of packets that the filter rejected because of either the source MAC address or the destination MAC address.
When the show interfaces extensive command is executed on a router with an MPC or a T4000 Type 5 FPC, the Input packet rejects counter of the Filter statistics field also displays statistics related to the following packet errors:
- Invalid VLAN range
- Tagged packet received on an untagged interface
