Hi Tony,
After moving, it seems OK for only the leader advertises a (Updated) Area
Leader Sub-TLV. After the old/current leader dies, a new leader will be elected
and the new leader will advertises a (Updated) Area Leader Sub-TLV.
Since the other nodes do not advertise any Area Leader Sub-TLVs, the space
used for advertising Area Leader Sub-TLVs by these nodes before moving should
be saved.
Best Regards,
Huaimo
________________________________
From: Tony Li <[email protected]> on behalf of [email protected]
<[email protected]>
Sent: Tuesday, May 28, 2019 11:20 AM
To: Huaimo Chen
Cc: [email protected]
Subject: Re: Enhancement related to Area Leader Sub-TLV
Hi Huaimo,
Before moving, each of N nodes may advertise an Area Leader Sub-TLV and a
Dynamic Flooding Sub-TLV. After moving, only the leader node advertises a
(Updated) Area Leader Sub-TLV.
The Area Leader sub-TLV should be advertised by all nodes that are candidates
to being Area Leader. Strictly speaking, you could choose only one, but that
would become a single point of failure. For simple redundancy, two seems a
practical minimum, however it still seems somewhat risky due to the possible
loss of an Area Leader after a multi-failure partition. Thus, it is likely that
all N nodes will continue to advertise the Area Leader sub-TLV.
Since no sub-TLVs are withdrawn, there is no space savings.
Tony
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