rQuerier3.seq - "Multicast Listener Discovery for IPv6" Test
Querier : state transition diagram 3
Router
None
This test check following.
*1: When NUT is [Checking Listeners] state, NUT receive Other router's Query,
and NUT become Non-Querier.
But NUT send Multicast-Address-Specific Query.
-- in RFC2710 page 14 --
However, any groups in "Checking Listeners" state continue
with the same state transition diagram until the "Checking Listeners"
state is exited. E.g. a router that starts as a Querier, receives a
Done message for a group and then receives a Query from a router with
a lower address (causing a transition to the Non-Querier state)
continues to send multicast-address-specific queries for the group in
question until it either receives a Report or its timer expires, at
which time it starts performing the actions of a Non-Querier for this
group.
-- in RFC2710 page 14 --
-Test flow
1. [No Listeners Present] > [Listeners Present]
1.1. receive General Query message
1.2. send Report message
Now NUT is [Listeners Present] state
2. [Listeners Present] > [Checking Listeners]
2.1. send Done maessage
2.2. receive Multicast-Address-Specific Query message
Now NUT is [Checking Listeners] state
3. Querier > Non-Querier
3.1. send Generl Query message
(Generl Query's source address < NUT address)
NUT become Non-Querier
4. [Checking Listeners] > [Checking Listeners]
4.1. receive Multicast-Address-Specific Query message
Now NUT is still [Checking Listeners] state
4.2. NUT don't send an Multicast-Address-Specific Query message any more
5. [Checking Listeners] > [No Listeners Present]
5.1. wait timer
([Last Listener Query Interval] * [Last Listener Query Count] = (1 x 2) = 2s) expired
(but at this moment, already timer expired)
Now NUT is [No Listeners Present] state
6. Check : Now NUT is Non-Querier
6.1. NUT don't send an General Query message
6.2. send Generl Query message
6.3. send Report message
6.4. send Done message
6.5. NUT don't send an Multicast-Address-Specific Query message
NUT TN
| |
+------->| Generl Query
<--------+ Report
| |
<--------+ Done
+------->| Multicast-Address-Specific Query
| |
<--------+ Generl Query
| | (Generl Query's source address < NUT address)
| |
+------->| Multicast-Address-Specific Query
| |
| | Don't receive Multicast-Address-Specific Query any more
| |
| | No General Query message.
| |
<--------+ Generl Query
| | (Generl Query's source address < NUT address)
| |
<--------+ Report
<--------+ Done
| |
| | No Multicast-Address-Specific Query message.
| |
PASS: NUT don't send an Genral Query & Multicast-Address-Specific Query message.
perldoc V6evalTool
MLD.pm "Multicast Listener Discovery for IPv6" Test Common Utility