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If IP validation is selected, the valid IP addresses for End-users are defined.
The establishment of valid IP addresses is described in section 8.2 on page
63. Switching towards End-users is then based on IP addresses. Packets with
unknown IP addresses are discarded, unless a transit link is defined, as
described in section 5.3.1 on page 33.
During IP validation, the source addresses of packets originating from the End-
users are validated. Packets with invalid IP addresses are discarded.
If Virtual MAC is selected, the End-users’ MAC addresses are replaced with
MAC addresses defined by the system, for all packets forwarded through the
uplink towards the access network. These addresses are changed back to the
original MAC addresses when packets are sent back on End-user links.
If PPPoE is selected, the Ethertype of the packets is checked. Packets without
Ethertype 0x8863 or 0x8864 are discarded.
5.3.3 Switching Domain – Multicast
There are four options for handling multicast packets in a switching domain:
Yes – multicast packets are forwarded in the same manner as broadcast
packets.
No – multicast packets are discarded.
IGMP Snooping – multicast streams are forwarded to subscribing End-
user nodes. There is no suppression of IGMP messages. All messages
and queries are forwarded.
IGMP Proxy – When EFN324 acts as IGMP proxy, it provides a total
separation between the multicast network nodes and the End-user nodes.
When acting as IGMP proxy, the EFN324 fully suppresses IGMP
messages. That is, none of the messages coming from the End-users are
forwarded.
Multicast as Broadcast
When Yes is selected, IGMP snooping is not used. Multicast packets from
non-uplink ports are forwarded to the uplink. Multicast packets from the uplink
are broadcast to all other ports.
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