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Hello
I have a question about multicast forwarding cache entry
structure. (struct mfc6_cache in include/linux/mroute6.h)
It has mfc_un.res.ttls field.
Is that field for TTL threshold ?
If so, I wonder why threshold scheme is used for forwarding
like IPv4 multicast forwarding.
As I know, IPv6 multicast group address has scope nibble in
there.
So router at boundary can filter the multicast packet by its
group address scope.
Please explain why TTL threshold is still
using.
Thanks in advance.
Sunyoung, Hwang |