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-rw-r--r--src/vnet/ip/ip.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/vnet/ip/ip.c b/src/vnet/ip/ip.c
index 133767bd06c..c5b43d446be 100644
--- a/src/vnet/ip/ip.c
+++ b/src/vnet/ip/ip.c
@@ -235,6 +235,7 @@ ip6_preflen_to_mask (u8 pref_len, ip6_address_t * mask)
}
else
{
+ mask->as_u64[0] = 0xffffffffffffffffL;
mask->as_u64[1] =
clib_host_to_net_u64 (0xffffffffffffffffL << (128 - pref_len));
}