- /* Learn or update sender's mapping only for requests or unicasts
- that don't match local interface address. */
- if (ethernet_address_cast (eth0->dst_address) ==
- ETHERNET_ADDRESS_UNICAST || is_request0)
- {
- if (am->limit_arp_cache_size &&
- pool_elts (am->ip4_entry_pool) >= am->limit_arp_cache_size)
- unset_random_arp_entry ();
-
- vnet_arp_set_ip4_over_ethernet (vnm, sw_if_index0,
- &arp0->ip4_over_ethernet[0],
- 0 /* is_static */ , 0);
- error0 = ETHERNET_ARP_ERROR_l3_src_address_learned;
- }
-
- /* Only send a reply for requests sent which match a local interface. */
- if (!(is_request0 && dst_is_local0))
+ /* Learn or update sender's mapping only for replies to addresses
+ * that are local to the subnet */
+ if (arp0->opcode ==
+ clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply) &&
+ dst_is_local0)