diff --git a/isisd/isis_flags.h b/isisd/isis_flags.h
new file mode 100644
index 0000000..66b9484
--- /dev/null
+++ b/isisd/isis_flags.h
@@ -0,0 +1,58 @@
+/*
+ * IS-IS Rout(e)ing protocol - isis_flags.h
+ *                             Routines for manipulation of SSN and SRM flags
+ *
+ * Copyright (C) 2001,2002   Sampo Saaristo
+ *                           Tampere University of Technology      
+ *                           Institute of Communications Engineering
+ *
+ * This program is free software; you can redistribute it and/or modify it 
+ * under the terms of the GNU General Public Licenseas published by the Free 
+ * Software Foundation; either version 2 of the License, or (at your option) 
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,but WITHOUT 
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for 
+ * more details.
+
+ * You should have received a copy of the GNU General Public License along 
+ * with this program; if not, write to the Free Software Foundation, Inc., 
+ * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifndef _ZEBRA_ISIS_FLAGS_H
+#define _ZEBRA_ISIS_FLAGS_H
+
+/* The grand plan is to support 1024 circuits so we have 32*32 bit flags
+ * the support will be achived using the newest drafts */
+#define ISIS_MAX_CIRCUITS 32 /* = 1024 */ /*FIXME:defined in lsp.h as well*/
+
+struct flags *new_flags        (int size);
+int           flags_get_index  (struct flags *flags);
+void          flags_free_index (struct flags *flags, int index);
+
+int  flags_any_set (u_int32_t *flags);
+
+#define ISIS_SET_FLAG(F,C) \
+        F[C->idx>>5] |= (1<<(C->idx & 0x1F));
+
+#define ISIS_CLEAR_FLAG(F,C) \
+        F[C->idx>>5] &= ~(1<<(C->idx & 0x1F));
+
+#define ISIS_CHECK_FLAG(F, C)  F[(C)->idx>>5] & (1<<(C->idx & 0x1F))
+
+/* sets all u_32int_t flags to 1 */
+#define ISIS_FLAGS_SET_ALL(FLAGS) \
+        memset(FLAGS,0xFF,ISIS_MAX_CIRCUITS*4);
+
+#define ISIS_FLAGS_CLEAR_ALL(FLAGS) \
+        memset(FLAGS,0x00,ISIS_MAX_CIRCUITS*4);
+
+#endif /* _ZEBRA_ISIS_FLAGS_H */
+
+
+
+
+
+