Hi Niviya,
On 10-04-20 05:09 AM, niviya vijayan wrote:
Hi Suresh,
Thanks for your reply. I have a doubt on your answer.
As per your comments, there can be two MLD report msg which will join
the node in solicited multicast group . But in the RFC 4861, they have
mention there should be a join request to all node multicast group.
As described in section 6 of RFC3810 MLD reports are not sent for the
all-nodes multicast address
" The link-scope all-nodes multicast address, (FF02::1), is handled as
a special case. On all nodes -- that is all hosts and routers,
including multicast routers -- listening to packets destined to the
all-nodes multicast address, from all sources, is permanently enabled
on all interfaces on which multicast listening is supported. No MLD
messages are ever sent regarding neither the link-scope all-nodes
multicast address, nor any multicast address of scope 0 (reserved) or
1 (node-local)."
.
RFC 4861 Statement:- 7.2.1.Interface Initialization
“When a multicast-capable interface becomes enabled, the node MUST join
the all-nodes multicast address on that interface, as well as the
solicited- node multicast address corresponding to each of the IP
addresses assigned to the interface.”
I have one more query regarding NA messages.
While creating ipv6 address on an interface, unsolicited NA messages
will be sent to all node multicast address to inform all other nodes in
the network. When i tried this scenario , I have seen two NA messages.
1) source as ipv6 address and destination as ipv6 all node address.
2) source as link-local address and destination as ipv6 all node address.
My question is, whenever there is a change in ipv6 address on a node,
both these 2 NA messages will propogate through the network?
or is it really required to share about the link-local address as we are
not at all changing the ipv6 link-local address.?
It is unclear what the circumstances are. Specifically, what action did
you perform that resulted in these messages? Did you change the MAC
address of the card?
Cheers
Suresh
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