3-22
Port flags: D-Dynamic port, S-Static port, C-Copy port
Subvlan flags: R-Real VLAN, C-Copy VLAN
Vlan(id):100.
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
Router port(s):total 1 port.
Eth1/0/1 (D) ( 00:01:30 )
IP group(s):the following ip group(s) match to one mac group.
IP group address:FF1E::101
(::, FF1E::101):
Attribute: Host Port
Host port(s):total 2 port.
Eth1/0/3 (D) ( 00:03:23 )
Eth1/0/4 (D) ( 00:04:10 )
MAC group(s):
MAC group address:3333-0000-0101
Host port(s):total 2 port.
Eth1/0/3
Eth1/0/4
As shown above, Ethernet 1/0/3 and Ethernet 1/0/4 of Switch A have joined IPv6 multicast group
FF1E::101.
Static Port Configuration Example
Network requirements
z As shown in Figure 3-5, Router A connects to an IPv6 multicast source (Source) through Ethernet
1/0/2, and to Switch A through Ethernet 1/0/1.
z MLDv1 is to run on Router A, and MLDv1 Snooping is to run on Switch A, Switch B and Switch C,
with Router A acting as the MLD querier.
z Host A and host C are permanent receivers of IPv6 multicast group FF1E::101. Ethernet 1/0/3 and
Ethernet 1/0/5 on Switch C are required to be configured as static member ports for multicast group
224.1.1.1 to enhance the reliability of multicast traffic transmission.
z Suppose STP runs on the network. To avoid data loops, the forwarding path from Switch A to
Switch C is blocked under normal conditions, and IPv6 multicast traffic flows to the receivers
attached to Switch C only along the path of Switch A—Switch B—Switch C.
z It is required to configure Ethernet 1/0/3 that connects Switch A to Switch C as a static router port,
so that IPv6 multicast traffic can flow to the receivers nearly uninterruptedly along the path of
Switch A—Switch C in the case that the path of Switch A—Switch B—Switch C gets blocked.
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