NAME

V6LC_2_2_8_A - Ceasing to Be An Advertising Interface

TARGET

Router

TOPOLOGY

    |
   RUT
    |
----+--- Link0

Link0	global	3ffe:501:ffff:100::/64
	link-local	fe80::/64
RUT	global	3ffe:501:ffff:100::<NutDef.Link0_addr>
	link-local	fe80::<NutDef.Link0_addr>
	ether	<NutDef.Link0_addr>

SETUP

none

TEST PROCEDURE

- Verify that a router sends correct Router Advertisements when its interface ceases to be an advertising interface.

   TN1     RUT
    |       |
    |       * Configure Interface A on the RUT to be an advertising interface.
    |       |
    |   <-- | RA (multicast)
    |   <-- | RA (multicast)
    |   <-- | RA (multicast)
    |       |
    |       * Configure Interface A on the RUT to discontinue be an advertising interface.
    |       |
    |   <-- | RA (multicast) [Judgment #1]
    |   <-- | RA (multicast)
    |   <-- | RA (multicast)
    |       |
    V       V

1. Configure Interface A on the RUT to be an advertising interface.

2. Observe RA

        RA message format #1
            IPv6 header
                hop limit          = 255
                source             = RUT (link-local)
                destination        = all-nodes multicast address
            RA
                cur hop limit      = 64
                M                  = 0
                O                  = 0
                router lifetime    = 1800
                reachable time     = 0
                retrans timer      = 0
            SLL option
            Prefix Information option
                prefix length      = 64
                L                  = 1
                A                  = 1
                valid Lifetime     = 2592000
                preferred lifetime = 604800
                prefix             = 3ffe:501:ffff:100::

        RA message format #2
            IPv6 header
                hop limit          = 255
                source             = RUT (link-local)
                destination        = all-nodes multicast address
            RA
                cur hop limit      = 64
                M                  = 0
                O                  = 0
                router lifetime    = 1800
                reachable time     = 0
                retrans timer      = 0
            Prefix Information option
                prefix length      = 64
                L                  = 1
                A                  = 1
                valid Lifetime     = 2592000
                preferred lifetime = 604800
                prefix             = 3ffe:501:ffff:100::

3. Configure Interface A on the RUT to discontinue be an advertising interface.

4. Observe RA

        RA message format #1
            IPv6 header
                hop limit          = 255
                source             = RUT (link-local)
                destination        = all-nodes multicast address
            RA
                cur hop limit      = 64
                M                  = 0
                O                  = 0
                router lifetime    = 0
                reachable time     = 0
                retrans timer      = 0
            SLL option
            Prefix Information option
                prefix length      = 64
                L                  = 1
                A                  = 1
                valid Lifetime     = 2592000
                preferred lifetime = 604800
                prefix             = 3ffe:501:ffff:100::

        RA message format #2
            IPv6 header
                hop limit          = 255
                source             = RUT (link-local)
                destination        = all-nodes multicast address
            RA
                cur hop limit      = 64
                M                  = 0
                O                  = 0
                router lifetime    = 0
                reachable time     = 0
                retrans timer      = 0
            Prefix Information option
                prefix length      = 64
                L                  = 1
                A                  = 1
                valid Lifetime     = 2592000
                preferred lifetime = 604800
                prefix             = 3ffe:501:ffff:100::

JUDGEMENT

[Judgment #1] The RUT should transmit no more than MAX_FINAL_RTR_ADVERTISEMENTS (3) final multicast Router Advertisement on the interface with a Router Lifetime field of zero.

CLEANUP

none

REFERENCE

RFC 2461 - Neighbor Discovery for IPv6