Update default neighbor cache size to 8 entries

Cargo.toml

@@ -151,11 +151,11 @@ iface-max-sixlowpan-address-context-count-1024 = []
 iface-neighbor-cache-count-1 = []
 iface-neighbor-cache-count-2 = []
 iface-neighbor-cache-count-3 = []
-iface-neighbor-cache-count-4 = [] # Default
+iface-neighbor-cache-count-4 = []
 iface-neighbor-cache-count-5 = []
 iface-neighbor-cache-count-6 = []
 iface-neighbor-cache-count-7 = []
-iface-neighbor-cache-count-8 = []
+iface-neighbor-cache-count-8 = [] # Default
 iface-neighbor-cache-count-16 = []
 iface-neighbor-cache-count-32 = []
 iface-neighbor-cache-count-64 = []

build.rs

@@ -9,7 +9,7 @@ static CONFIGS: &[(&str, usize)] = &[
     ("IFACE_MAX_ADDR_COUNT", 2),
     ("IFACE_MAX_MULTICAST_GROUP_COUNT", 4),
     ("IFACE_MAX_SIXLOWPAN_ADDRESS_CONTEXT_COUNT", 4),
-    ("IFACE_NEIGHBOR_CACHE_COUNT", 4),
+    ("IFACE_NEIGHBOR_CACHE_COUNT", 8),
     ("IFACE_MAX_ROUTE_COUNT", 2),
     ("FRAGMENTATION_BUFFER_SIZE", 1500),
     ("ASSEMBLER_MAX_SEGMENT_COUNT", 4),

gen_config.py

@@ -30,7 +30,7 @@ def feature(name, default, min, max, pow2=None):
 feature("iface_max_addr_count", default=2, min=1, max=8)
 feature("iface_max_multicast_group_count", default=4, min=1, max=1024, pow2=8)
 feature("iface_max_sixlowpan_address_context_count", default=4, min=1, max=1024, pow2=8)
-feature("iface_neighbor_cache_count", default=4, min=1, max=1024, pow2=8)
+feature("iface_neighbor_cache_count", default=8, min=1, max=1024, pow2=8)
 feature("iface_max_route_count", default=2, min=1, max=1024, pow2=8)
 feature("fragmentation_buffer_size", default=1500, min=256, max=65536, pow2=True)
 feature("assembler_max_segment_count", default=4, min=1, max=32, pow2=4)