[spp] [PATCH 3/6] docs: add installing text2pcap for pcap PMD

[ogawa.yasufumi at lab.ntt.co.jp]

From: Yasufumi Ogawa <ogawa.yasufumi at lab.ntt.co.jp>

Signed-off-by: Yasufumi Ogawa <ogawa.yasufumi at lab.ntt.co.jp>
---
 docs/guides/setup/getting_started.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/guides/setup/getting_started.rst b/docs/guides/setup/getting_started.rst
index 275e12f..ca8085b 100644
--- a/docs/guides/setup/getting_started.rst
+++ b/docs/guides/setup/getting_started.rst
@@ -170,10 +170,13 @@ Clone repository and compile DPDK in any directory.
 SPP provides libpcap-based PMD for dumping packet to a file or retrieve
 it from the file.
 To use PCAP PMD, install ``libpcap-dev`` and enable it.
+``text2pcap`` is also required for creating pcap file which
+is included in ``wireshark``.
 
 .. code-block:: console
 
     $ sudo apt install libpcap-dev
+    $ sudo apt install wireshark
 
 PCAP is disabled by default in DPDK configuration.
 ``CONFIG_RTE_LIBRTE_PMD_PCAP`` defines the configuration and enabled
-- 
2.17.0