Static Multicast Mac Filtering; Vlan Classification - Avaya 2330 Manual

Layer 2 fundamentals

Static multicast MAC filtering

Some network applications, such as mirroring, rely on a Layer 2 multicast MAC mechanism to
send a frame to multiple hosts for processing. Multicast MAC filtering lets you direct MAC
multicast flooding to a specific set of ports.
In Layer 2, a multicast MAC address generally floods to all ports in the VLAN. With multicast
MAC filtering, you can define a separate flooding domain for a given multicast MAC address,
which is a subset of the ports on a VLAN.
To perform multicast MAC filtering, you create the VLAN normally and then manually define a
flooding domain (that is, MAC address and port list) for a specific multicast address. When
specifying the multicast MAC flooding domain, indicate which ports or link aggregation groups
are to be considered for multicast traffic. The actual flooding is then based on whether the
specified ports are active members in the VLAN.

VLAN classification

Each frame received by a VLAN bridge is classified as belonging to exactly one VLAN by
associating a VID value with the received frame. The classification is achieved as follows:
1. If the vlan_identifier parameter carried in a received data indication is the null VLAN
2. If the vlan_identifier parameter carried in a received data indication is the null VLAN
3. The VID for the frame is the vlan_identifier parameter value.
Important:
The vlan_identifier parameter carries the null VLAN ID if the frame was not VLAN tagged.
There are two cases: either the frame was untagged, or the frame was tagged and the tag
header carried a VID value equal to the null VLAN ID (that is, a priority-tagged frame).
Supported protocols for protocol-based VLAN classification rules
The following table lists the protocols that the Secure Router 2330/4134 supports for VLAN
classification rules.
32 Configuration — Layer 2 Ethernet
ID (VID), and no VLAN classification rules are configured, then the VID for the frame
is the unique Port VLAN ID (PVID) associated with the port through which the frame
was received. Otherwise:
ID and there are VLAN classification rules configured, then the VID for the frame is
selected from the VID set of the port through which the frame was received. The
VID selected is the member of the VID set for which the associated Protocol Group
Identifier (PGI) is equal to the PGI of the frame. If no matches are found, then the
VID for the frame is the PVID associated with the port. Otherwise:
Comments? infodev@avaya.com
July 2013