Chelsio Communications Chelsio T5 Guide de l'utilisateur télécharger pdf (Page 198)

100

101

Chapter XIV. WD Sniffing and Tracing

Chelsio T5/T4 Unified Wire For Linux Page 198

1. Theory of Operation

The objective of these utilities (wd_sniffer and wd_tcpdump_trace) is to provide sniffing and

tracing capabilities by making use of T4's hardware features.

Sniffer- Involves targeting specific multicast traffic and sending it directly to user space.

a) Get a Queue (raw QP) idx.

b) Program a filter to redirect specific traffic to the raw QP queue.

Tracer - All tapped traffic is forwarded to user space and also pushed back on the wire via

the internal loop back mechanism

a) Get a Queue (raw QP) idx

b) Set the T4 adapter in loop back

c) Connect Client A and B to ports 0 and 1 or ports 2 and 3.

d) Enable tracing.

In either mode the targeted traffic bypasses the kernel TCP/IP stack and is delivered directly to

user space by means of an RX queue.

1 2 ... 193 194 195 196 197 198 199 200 201 202 203 ... 451 452

Commentaires sur ces manuels

Pas de commentaire

Chelsio Communications Chelsio T5 Guide de l'utilisateur Page 198

Commentaires sur ces manuels

Produits connexes et manuels pour Logiciel Chelsio Communications Chelsio T5