diff options
authorBIN HU <>2018-10-11 16:53:40 -0700
committerBin Hu <>2018-10-12 00:02:04 +0000
commitd8d182daea54b155bd001f1528986b906ccdb723 (patch)
parent279e8347415e33923797cc313956ed0f6a240162 (diff)
Clarification of NDP in IPv6 and ARP in IPv4
Change-Id: I930825e20293284a4a77c0b4b9ea3e80646baf7d Signed-off-by: BIN HU <> (cherry picked from commit cf8a76b3ae499b86150a66b87e796d4c0d5eec56)
1 files changed, 5 insertions, 6 deletions
diff --git a/docs/release/userguide/icmpv6-and-ndp-proxying-for-docker-containers.rst b/docs/release/userguide/icmpv6-and-ndp-proxying-for-docker-containers.rst
index e916c7e..3c5bf97 100644
--- a/docs/release/userguide/icmpv6-and-ndp-proxying-for-docker-containers.rst
+++ b/docs/release/userguide/icmpv6-and-ndp-proxying-for-docker-containers.rst
@@ -16,12 +16,11 @@ To communicate on its directly-connected network, a host must implement the
communication protocol used to interface to that network. We call this a link
layer or media-access layer protocol.
-ICMPv6 is used instead of ARP as in IPv4, with following Neighbor Discovery
-Protocol (NDP) options.
-NDP defines five ICMPv6 packet types for the purpose of router solicitation,
-router advertisement, neighbor solicitation, neighbor advertisement, and
-network redirects. Refer RFC 122 & 3122.
+IPv4 uses ARP for link and MAC address discovery. In contrast IPv6 uses ICMPv6
+though Neighbor Discovery Protocol (NDP). NDP defines five ICMPv6 packet types
+for the purpose of router solicitation, router advertisement, neighbor
+solicitation, neighbor advertisement, and network redirects.
+Refer RFC 122 & 3122.
Contrasting with ARP, NDP includes Neighbor Unreachability Detection (NUD),
thus, improving robustness of packet delivery in the presence of failing