Hi Suresh, 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.” *Any idea What does this statement mean?* For the second query:- I didnt change the MAC address of the card. I tried creating a new ipv6 address on the interface and I have seen these two unsolicited NA messages.My question is , Why the node is sending unsolicited NA message ( with source as "link-local address" & destination as "all-node multicast address").I am expecting only one unsolicited NA message( with source as "ipv6 global address" & destination as "all-node multicast address"). I am not at all changing the link-local address and the link-local address is already active on the interface. Regards, Niviya On Wed, Apr 21, 2010 at 4:22 AM, Suresh Krishnan < suresh.krish...@ericsson.com> wrote: > 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? > Hi Suresh, I didnt change the MAC address of the card. I tried creating a new ipv6 address on the interface and I have seen these two unsolicited NA messages.My question is , Why the node is sending unsolicited NA message ( with source as "link-local address" & destination as "all-node multicast address").I am expecting only one unsolicited NA message( with source as "ipv6 global address" & destination as "all-node multicast address"). I am not at all changing the link-local address and the link-local address is already active on the interface. > > Cheers > Suresh > > > >
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