diff --git a/src/gb/gprs_ns2_udp.c b/src/gb/gprs_ns2_udp.c
index 9058279..370937f 100644
--- a/src/gb/gprs_ns2_udp.c
+++ b/src/gb/gprs_ns2_udp.c
@@ -336,6 +336,10 @@
 
 	bind->driver = &vc_driver_ip;
 	bind->ll = GPRS_NS2_LL_UDP;
+	/* expect 100 mbit at least.
+	 * TODO: ask the network layer about the speed. But would require
+	 * notification on change. */
+	bind->transfer_capability = 100;
 	bind->send_vc = nsip_vc_sendmsg;
 	bind->free_vc = free_vc;
 	bind->dump_vty = dump_vty;