diff --git a/src/iface.cc b/src/iface.cc
index b2df7b7..74d2fd6 100644
--- a/src/iface.cc
+++ b/src/iface.cc
@@ -34,6 +34,7 @@
 
 #include <linux/filter.h>
 
+#include <errno.h>
 #include <string>
 #include <vector>
 #include <map>
@@ -341,7 +342,11 @@ ssize_t iface::write(int fd, const address& daddr, const uint8_t* msg, size_t si
     int len;
 
     if ((len = sendmsg(fd,& mhdr, 0)) < 0)
+    {
+        int e = errno;
+        logger::error() << "iface::write() failed! errno=" << e;
         return -1;
+    }
 
     return len;
 }
@@ -427,7 +432,7 @@ ssize_t iface::write_advert(const address& daddr, const address& taddr, bool rou
     opt->nd_opt_len          = 1;
 
     na->nd_na_type           = ND_NEIGHBOR_ADVERT;
-    na->nd_na_flags_reserved = ND_NA_FLAG_SOLICITED | (router ? ND_NA_FLAG_ROUTER : 0);
+    na->nd_na_flags_reserved = (daddr.is_multicast() ? 0 : ND_NA_FLAG_SOLICITED) | (router ? ND_NA_FLAG_ROUTER : 0);
 
     memcpy(&na->nd_na_target,& taddr.const_addr(), sizeof(struct in6_addr));
 
diff --git a/src/session.cc b/src/session.cc
index 2c3e65c..05091f4 100644
--- a/src/session.cc
+++ b/src/session.cc
@@ -24,6 +24,8 @@ NDPPD_NS_BEGIN
 
 std::list<weak_ptr<session> > session::_sessions;
 
+static address all_nodes = address("ff02::1");
+
 void session::update_all(int elapsed_time)
 {
     for (std::list<weak_ptr<session> >::iterator it = _sessions.begin();
@@ -69,7 +71,7 @@ ptr<session> session::create(const ptr<proxy>& pr, const address& saddr,
 
     se->_ptr   = se;
     se->_pr    = pr;
-    se->_saddr = saddr;
+    se->_saddr = address("::") == saddr ? all_nodes : saddr;
     se->_taddr = taddr;
     se->_daddr = daddr;
     se->_ttl   = pr->timeout();