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I'm not sure I follow your questions, but here is what I think
the intent is.
If the host has received an RA (solicited or beaconed) from a
router and has decided to select that router as its default, it can unicast the
CPS directly to the router.
If, on the other hand, the host has not received any RAs or a
multicast RS has elicited a number of RAs in reply, then the host can instead
multicast the CPS to All_Routers_Multicast, rather than unicasting it to each
individual router.
Does that answer your question?
jak
----- Original Message -----
Sent: Wednesday, September 21, 2005 4:04
AM
Subject: About CPS message of SEND in
IPv6
Hi, all experts
I have one question about
"When soliciting certificates for a router, a
host MUST send
Certification
Path Solicitations either to the All-Routers multicast
address, if it has not selected a default
router yet, or to the
default
router's IP address, if a default router has already been
selected." In rfc3971.
Does it mean the following ?
1.if
there are not other routers that have passed the anchor authentication,
then host will send CPS to the All-Routers multicast address, and
all routers, include ones that have send the certificate paths, will
respond
to the solicitation.
2.if an
another router has passed the anchor authentication, host will send the
CPS to the solicited router address, but not the address of router that
has
passed the anchor authentication.
Thanks
Hongyan
2005-9-21
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