Version: 1.5
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Ethernet Bridging
There are three features supported for bridge function.
IEEE 802.1d STD transparent bridging
Up to 4000 MAC entries address table
Port-based VLAN
IEEE 802.3 ad standard.
Supports oversized Ethernet frames up to 1526 byte.
IEEE 802.1Q Tagged VLANand Double-tagged VLAN capabilities conform to IEEE 802.1ad
Standard
IVD uses the IEEE 802.1Q Tagged and double Tagged VLAN; users can allow this device to
deliver tagged/untagged frames in these ports. The IVD supports up to 512 VLAN groups and can
be applied up to 4094 VLAN identifications.
VLAN Feature
The DSLAM is able to attach VLAN tag (S-Tag) to untagged frames, received on user ports at the
upstream direction.
The DSLAM is able to attach a second VLAN tag (S-Tag) to tagged frames (C-Tag) received on
user ports at the upstream direction.
The DSLAM is able to attach two VLAN tags (S-Tag, C-Tag) to untagged frames, received on user
ports at the upstream direction.
The DSLAM is able to remove VLAN Tag identification (S-Tag) from frames received from the
aggregation the DSLAM". (i.e. downstream direction) before sending them on user ports.
The DSLAM is able to remove VLAN Tag identification from frames received from the aggregation
network (i.e. downstream direction) before sending them on user ports. The options for. The
options for removal are both S-Tag and C-Tag.
The Ethertype field for the 802.1ad tagging, i.e. S-Tags, is configurable.
The DSLAM supports two types of tagged ports:
‧
VLAN-transparent port
‧
Non VLAN transparent port
VLAN allocation and forwarding mechanisms
IVD conforms to 1:1 VLAN forwarding defined in WT101 of DSL Forum.
IVD is able to disable address learning for 1:1 VLANs.
IVD conforms to N:1 VLAN forwarding defined in WT101 of DSL Forum.
IEEE 802.1p Priority
IVD supports IEEE 802.1p at VLAN level to assign priority levels to all individual ports. Users can
set different quality of service for individual application.
For example, voice and video services can set high priority and Internet data service will be lower
priority.
Support 4 queues for per ATM port.
Support 8 queues for per physical Ethernet port.
MAC Address (Media Access Control) Filter
IVD can let users use the MAC filter for incoming frames based on MAC (Media Access Control)
addresses that specified by users. Users can enable/disable this function on specific port.
Access Control List per port is up to 8 entries. If port receives a packet which source MAC address
is met with one of the 8 entries, this packet can be forwarded to destination port.
Access Control List per device is up to 1024 entries. If port receives a packet which source MAC
address is met with one of these entries, this packet would not be forwarded to destination port.
The high priority of ACL rules is the allowing rule checking for per port.
MAC Address (Media Access Control) Count Filter
IVD supports users to limit the number of MAC addresses that may be dynamically learned or
statically configured on a port. Users can enable/disable this function on individual ports.
The global static learning table has up to 512 entries. Each entry can be set to a specific port. In
dynamic learning mode, there are 16 MAC address entries in DSL port and 256 entries in Ethernet
uplink port.
