Hardware Multicast Packet Replication Considerations
When configuring hardware multicast packet replication, the following considerations
apply.
•
Do not configure or transmit routing protocols over port 8. The FC drops traffic routed
to an IPv6 interface stacked over port 8.
•
We recommend that you configure the IP address of the IPv6 interface over port 8 to
be unnumbered.
•
We recommend that you configure an IPv6 interface over a VLAN over one of the
physical ports to reference the IPv6 interface over the same VLAN over port 8.
You cannot create the following configurations:
•
When two IPv6 interfaces configured over a port reference the same IPv6 interface
over port 8. The system does not accept this configuration attempt because you
typically configure the hardware multicast packet replication feature to redirect
multicast traffic over one VLAN, then redirect it to the same VLAN on port 8.
•
When the IPv6 interface configured with the hardware multicast packet replication
attribute is not installed on a line module that supports hardware multicast packet
replication.
•
When the IPv6 interface designated by the hardware multicast packet replication
attribute is not installed on a line module that supports hardware multicast packet
replication.
•
When the IPv6 interface designated by the hardware multicast packet replication
attribute is not on the same line module as the IPv6 interface configured with this
attribute.
•
When you configure a unique source MAC address for VLANs on port 8, the hardware
multicast packet replication hardware stamps the source MAC address on the VLAN,
overwriting any MAC address that you configured. For more information, see Configuring
Ethernet Interfaces in JunosE Physical Layer Configuration Guide.
•
The regular multicast implementation utilizes interface stacking that provides a unique
IPv6 attachment point for each elaboration of the egress multicast packet.
For the hardware multicast packet replication feature, you must attach policies to an
interface stack over port 8 that defines the encapsulation of the egress multicast traffic.
The system supports policies over port 8 just as it is above any of the other ports on
this line module.
Policies applied to the interface stack over port 8 affect the packets traversing this
stack whether or not the packet is destined for one port or all of the physical ports.
Therefore, you cannot apply different egress policies to multicast traffic for the
interfaces stacked above different ports, or rate limit on an individual interface over a
port. You also cannot monitor policy statistics on individual interfaces over a port.
Copyright © 2010, Juniper Networks, Inc.158
JunosE 11.2.x Multicast Routing Configuration Guide
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