LLA_DAD_NSPostDAD_DstTent - check the process when NUT receives invalid DAD
NS(Destination==NUT's
tentative address) with same Target
address after sending DAD NS.
All Node
LLA_DAD_NSPostDAD_DstTent.seq [-tooloption ...] -pkt <packetdef> [addrconf=<addrconfname>]
-tooloption : v6eval tool option <packetdef> : packet definition file (v6eval tool option) <addrconfname>: how to configure address on NUT; boot/reboot
detail of v6eval tool option: see perldoc V6evalTool.pm, perldoc V6evalRemote.pm
Reboot NUT or Initialize interface of NUT or Initialize IPv6 stack of NUT.
The following tests are prepared in this test package. See INDEX file.
Test for all node
NUT assignes autoconfigured address, even though NUT receives invalid (Destination==NUT's tentaive address) DAD NS for same target address as NUT, while DAD Process (after transmitting DAD NS).
Test sequence
TN NUT --------------------------------- Initialize NUT
Configure address of NUT (reboot or interface initialization etc...)
TN wait the DAD NS sent from NUT <=== Judgement #1: DAD NS ======= name: DADNS_from_NUT
==== Action #1: DAD NS =========> name: DADNS_from_TN_DstTent
Wait for DupAddrDetectTransmits*RetransTimer
Check if NUT's address is configured ==== Action #2: SOL NS =========> name: SOLNS_from_TN_SameTgt
<=== Judgement #2: SOL NA ======= name: NA_from_NUT, NA_from_NUT_woTLL
Test for all NODE
NUT performs Stateless Address Autoconfiguration(Link-local) on its interface
Judgement #1. NUT MUST transmit DAD NS for its autoconfigured Link-local address. name: DADNS_from_NUT src: ::0 dst: solnode[NUT's tentative Link-local] TargetAddress: NUT's tentative Link-local
Action #1. TN transmits invalid DAD NS which destined for allnode name: DADNS_from_TN_DstTent src: ::0 dst: NUT's tentative Link-local TargetAddress: NUT's tentative Link-local
Action #2. TN transmits SOL NS to check if NUT's address is configured name: SOLNS_from_TN_SameTgt src: TN's Link-local dst: solnode[NUT's Link-local] TargetAddress: NUT's Link-local
Judgement #2. NUT MUST transmit SOL NA for its autoconfigured Link-local address. name: NA_from_NUT, NA_from_NUT_woTLL src: NUT's Link-local dst: TN's Link-local TargetAddress: NUT's Link-local RFlag: 0 ( if NUT is a Router then 1) SFlag: 1 OFlag: 1 TLLOPT: NUT's MAC address
RFC2462
(omit) 5.4.3. Receiving Neighbor Solicitation Messages On receipt of a valid Neighbor Solicitation message on an interface, node behavior depends on whether the target address is tentative or not. If the target address is not tentative (i.e., it is assigned to the receiving interface), the solicitation is processed as described in [DISCOVERY]. If the target address is tentative, and the source address is a unicast address, the solicitation's sender is performing address resolution on the target; the solicitation should be silently ignored. Otherwise, processing takes place as described below. In all cases, a node MUST NOT respond to a Neighbor Solicitation for a tentative address.
If the source address of the Neighbor Solicitation is the unspecified address, the solicitation is from a node performing Duplicate Address Detection. If the solicitation is from another node, the tentative address is a duplicate and should not be used (by either node). If the solicitation is from the node itself (because the node loops back multicast packets), the solicitation does not indicate the presence of a duplicate address.
Implementor's Note: many interfaces provide a way for upper layers to selectively enable and disable the looping back of multicast packets. The details of how such a facility is implemented may prevent Duplicate Address Detection from working correctly. See the Appendix for further discussion. (omit)
detail of v6eval tool option: see perldoc V6evalTool.pm, perldoc V6evalRemote.pm