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Diffstat (limited to 'doc/guides/sample_app_ug/l2_forward_real_virtual.rst')
| -rw-r--r-- | doc/guides/sample_app_ug/l2_forward_real_virtual.rst | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/doc/guides/sample_app_ug/l2_forward_real_virtual.rst b/doc/guides/sample_app_ug/l2_forward_real_virtual.rst index a1c10c04..cf15d1c3 100644 --- a/doc/guides/sample_app_ug/l2_forward_real_virtual.rst +++ b/doc/guides/sample_app_ug/l2_forward_real_virtual.rst @@ -50,17 +50,14 @@ performs L2 forwarding for each packet that is received on an RX_PORT. The destination port is the adjacent port from the enabled portmask, that is, if the first four ports are enabled (portmask 0xf), ports 1 and 2 forward into each other, and ports 3 and 4 forward into each other. -Also, the MAC addresses are affected as follows: +Also, if MAC addresses updating is enabled, the MAC addresses are affected as follows: * The source MAC address is replaced by the TX_PORT MAC address * The destination MAC address is replaced by 02:00:00:00:00:TX_PORT_ID -This application can be used to benchmark performance using a traffic-generator, as shown in the :numref:`figure_l2_fwd_benchmark_setup`. - -The application can also be used in a virtualized environment as shown in :numref:`figure_l2_fwd_virtenv_benchmark_setup`. - -The L2 Forwarding application can also be used as a starting point for developing a new application based on the DPDK. +This application can be used to benchmark performance using a traffic-generator, as shown in the :numref:`figure_l2_fwd_benchmark_setup`, +or in a virtualized environment as shown in :numref:`figure_l2_fwd_virtenv_benchmark_setup`. .. _figure_l2_fwd_benchmark_setup: @@ -68,13 +65,23 @@ The L2 Forwarding application can also be used as a starting point for developin Performance Benchmark Setup (Basic Environment) - .. _figure_l2_fwd_virtenv_benchmark_setup: .. figure:: img/l2_fwd_virtenv_benchmark_setup.* Performance Benchmark Setup (Virtualized Environment) +This application may be used for basic VM to VM communication as shown in :numref:`figure_l2_fwd_vm2vm`, +when MAC addresses updating is disabled. + +.. _figure_l2_fwd_vm2vm: + +.. figure:: img/l2_fwd_vm2vm.* + + Virtual Machine to Virtual Machine communication. + +The L2 Forwarding application can also be used as a starting point for developing a new application based on the DPDK. + .. _l2_fwd_vf_setup: Virtual Function Setup Instructions @@ -128,7 +135,7 @@ The application requires a number of command line options: .. code-block:: console - ./build/l2fwd [EAL options] -- -p PORTMASK [-q NQ] + ./build/l2fwd [EAL options] -- -p PORTMASK [-q NQ] --[no-]mac-updating where, @@ -136,7 +143,10 @@ where, * q NQ: A number of queues (=ports) per lcore (default is 1) -To run the application in linuxapp environment with 4 lcores, 16 ports and 8 RX queues per lcore, issue the command: +* --[no-]mac-updating: Enable or disable MAC addresses updating (enabled by default). + +To run the application in linuxapp environment with 4 lcores, 16 ports and 8 RX queues per lcore and MAC address +updating enabled, issue the command: .. code-block:: console @@ -415,7 +425,8 @@ Packets are read in a burst of size MAX_PKT_BURST. The rte_eth_rx_burst() function writes the mbuf pointers in a local table and returns the number of available mbufs in the table. Then, each mbuf in the table is processed by the l2fwd_simple_forward() function. -The processing is very simple: process the TX port from the RX port, then replace the source and destination MAC addresses. +The processing is very simple: process the TX port from the RX port, then replace the source and destination MAC addresses if MAC +addresses updating is enabled. .. note:: |