docs: fixing VPP tutorial

Updating ARP table command.

Type: fix

Signed-off-by: Arthur de Kerhor <arthurdekerhor@gmail.com>
Change-Id: I02d6ac86aed4c83430f9d07bdeaa3e0f5c3ae73f

docs/gettingstarted/progressivevpp/interface.rst

@@ -25,7 +25,7 @@ VPP commands learned in this exercise
 #. `trace add <https://docs.fd.io/vpp/17.04/clicmd_src_vlib.html#clicmd_trace_add>`_
 #. `clear trace <https://docs.fd.io/vpp/17.04/clicmd_src_vlib.html#clicmd_clear_trace>`_
 #. `ping <https://docs.fd.io/vpp/17.04/clicmd_src_vnet_ip.html#clicmd_ping>`_
-#. `show ip arp <https://docs.fd.io/vpp/17.04/clicmd_src_vnet_ethernet.html#clicmd_show_ip_arp>`_
+#. `show ip neighbors <https://docs.fd.io/vpp/21.06/db/dba/clicmd_src_vnet_ip-neighbor.html#clicmd_show_ip_neighbors>`_
 #. `show ip fib <https://docs.fd.io/vpp/17.04/clicmd_src_vnet_fib.html#clicmd_show_ip_fib>`_
 
 Topology

docs/gettingstarted/progressivevpp/traces.rst

@@ -13,7 +13,7 @@ Skills to be Learned
 #. Clear a 'trace'
 #. Verify using ping from host
 #. Ping from vpp
-#. Examine Arp Table
+#. Examine ARP table (neighbors)
 #. Examine ip fib
 
 Basic Trace Commands
@@ -462,12 +462,12 @@ The output will demonstrate FD.io VPP's trace of ping for all packets.
 
 After examining the trace, clear it again using vpp# clear trace.
 
-Examine arp tables
--------------------
+Examine ARP table (neighbors)
+-----------------------------
 
 .. code-block:: console 
 
-  vpp# show ip arp
+  vpp# show ip neighbors
   Time           IP4       Flags      Ethernet              Interface
   1101.5636    10.10.1.1      D    e2:0f:1e:59:ec:f7 host-vpp1out        
 

docs/gettingstarted/progressivevpp/twovppinstances.rst

@@ -104,7 +104,7 @@ run/vpp/memif-vpp1vpp2 socket file
    vpp# create interface memif id 0 slave
 
 This will create an interface on vpp2 memif0/0 using /run/vpp/memif as
-its socket file. The role of vpp1 for this memif interface is 'slave'.
+its socket file. The role of vpp2 for this memif interface is 'slave'.
 
 Use your previously used skills to: