Zhone EtherXtend 3300 Series, User Manual

Page: 86 / 150

Configuring Bridging
84
EtherXtend User’s Guide
Untagged or transparent bridging which forwards traffic based on MAC
addresses but does not provide segregation of traffic. Traffic is broadcast
over the Ethernet port and is either accepted or rejected based on the
destination MAC address. There is no VLAN tagging; all ports are
learning and forwarding without restriction without broadcast
suppression. Forwarding to a default port is not allowed.
For transparent bridges, the type parameter is omitted to create bridges on the
interfaces with default transparent bridge settings. In the
bridge add , bridge
delete commands, <slot> and <port> may be replaced with brackets
containing numbers in series and/or (dash-separated) ranges; <port> may be
replaced with wildcard '*' for all ports on the card.
Refer to the Zhone CLI Reference Guide for a complete description of the
command options and syntax.
Note:
The EtherXtend ports can support both IP termination or
bridging on different virtual circuits. However, each virtual circuit
must be configured for either IP termination or bridging and cannot
support both at the same time.
Note: When routed and bridged traffic is configured for the same
uplink interface, VLAN tags must be used between both downlink
ports and the uplink interface for traffic differentiation. For routed
traffic, use the
ip-interface-record profile to specify the VLAN ID.
Bridge enhancements to flood unknowns and multicasts
Bridges are enhanced to enable VPN-like services using the floodUnknowns
and floodMulticast parameters. These parameters enable the EtherXtend to
forward unknown traffic to all bridge interfaces within the VLAN as follows:
•
FloodUnknown parameter on page 84
•
FloodMulticast parameter on page 85
FloodUnknown parameter
The FloodUknown parameter provides the ability to toggle the flooding of
unknown unicast destination frames. When this parameter is set to true, the
EtherXtend always forwards frames with an unknown unicast MAC if the
bridge is set for forward to unicast. When this parameter is set to false, the
EtherXtend always discards frames with an unknown unicast MAC if the
bridge is set for forward to unicast. Any frame that does not find a match in
the forwarding table will be discarded.
For transparent bridges, the default setting for this parameter is true. For
uplink bridges, the default setting for this parameter is false.