Technical Documentation
SRX3600 Services Gateway Network Processing Cards
Network Processing Cards (NPCs) are common form-factor module (CFM) cards that receive inbound traffic from the I/O cards (IOCs) and direct it to the appropriate Services Processing Card (SPC) for processing. Once services processing is complete, the NPC receives outbound traffic from the SPC(s) and directs it back to the appropriate IOC. Additionally, the NPC performs the following functions:
- Buffers incoming traffic and queues outgoing traffic.
- Performs advanced traffic management, including DoS/DDoS protective measures. For example, it can drop traffic to or from a particular IP address, protecting from ICMP, UDP, and TCP SYN flooding, and buffering bursty traffic to protect the Services Processing Card (SPC).
Figure 1: Network Processing Card
Table 1 describes the NPC behavior indicated by the LEDs on its front panel.
 | Note: The ONLINE button on the NPC front panel does not perform any function. |
Table 1: Network Processing Card LED Indictors
Label | Color | Status | Indicated Behavior |
|---|---|---|---|
SERVICE | Green | On steadily | The NPC is mapped to an IOC and is actively carrying traffic. |
Amber | On steadily | The NPC is mapped to a IOC, but there is no SPC present or reachable in the system so all traffic is dropped. | |
Dark (unlit) | Off | The NPC is not carrying traffic. | |
OK/FAIL | Green | On steadily | The NPC is operating normally. |
Blinking | The NPC is preparing for hot-swap event. | ||
Red | On steadily | The NPC has failed and is not operating normally. | |
Dark (unlit) | Off | The NPC is powered down. |
