diff --git a/SUMMARY.md b/SUMMARY.md
index 694326f..6703f21 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -23,3 +23,4 @@
 * [第35天, 启动与IOS](d35-booting-and-IOS.md)
 * [第36天, EIGRP](d36-EIGRP.md)
 * [第37天，EIGRP故障排除](d37-Troubleshooting-EIGRP.md)
+* [第38天，IPv6下的EIGRP](d38-EIGRP-For-IPv6.md)