(usagi-users 03688) Re: help : Question about multicast routing

Hello, all

I posted below question about 10 days ago.
No one knows about this ?

Please help.

Thans,
Sunyoung, Hwang

----- Original Message ----- 
From: Ȳ¼±¿µ 
To: [email protected] 
Sent: Thursday, August 10, 2006 6:37 PM
Subject: (usagi-users 03682) help : Question about multicast routing


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