Understanding Data Path Debugging for SRX Series Services Gateways

Data path debugging provides tracing and debugging at multiple processing units along the packet-processing path. The packet filter can be executed with minimal impact to the production system.

In data path debugging, a packet goes through multiple Services Processing Units (SPUs). At the same time, several Flexible PIC Concentrator (FPC) I/O cards (IOCs) provide EZchip ingress and egress traffic management. JUNOS Software supports IOC for filter-based, per-packet counting and logging to record the processing path of a packet. Only the matched packets are traced by the IOC EZchip ingress, EZchip egress, load-balancing thread (LBT), and packet-ordering thread (POT).

The following events are defined in the packet-processing path:

• ezchip ingress
• ezchip egress
• spu.lbt
• spu.pot

Related Topics

• JUNOS Software Feature Support Reference for SRX Series and J Series Devices
• SRX Series Services Gateways Processing Overview
• Understanding Session Characteristics for SRX Series Services Gateways
• SRX5600 and SRX5800 Services Gateways Processing Overview
• SRX3400 and SRX3600 Services Gateways Processing Overview
• SRX210 Services Gateway Processing Overview
• Debugging the Data Path (CLI Procedure)