-

host

ip netns exec vpp1 ping -c3 172.16.2.2





vpp
trace add af-packet-input 10
show trace

macswap enable-disable ?
show inter
macswap enable-disable host-vpp1
show vlib graph
<find “macswap”>
clear trace
<goto host and ping again>
show trace
<lets note the sw_if_index (6) and the next_index (0)>
show inter
Output: host-vpp1                         6
show vlib graph
<find “macswap”>
Output: macswap                      interface-output [0]
show trace
Output: note: host-vpp1-output which is “interface-output”


typedef struct {
  u8 src[6];
  u8 dst[6];
  u32 next_index;
  u32 sw_if_index;
} macswap_trace_t;

/* packet trace format function */
static u8 * format_macswap_trace (u8 * s, va_list * args)
{
  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  macswap_trace_t * t = va_arg (*args, macswap_trace_t *);

  s = format (s, "MACSWAP: sw_if_index %d, next index %d src=%U dst=%U",
              t->sw_if_index, t->next_index, format_ethernet_address, t->src,
              format_ethernet_address, t->dst);
  return s;
}