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Enabling a Layer 2 aggregate interface to reflect
incoming packets back
About reflecting incoming packets on a Layer 2 aggregate interface
By default, the device drops a packet if its outgoing interface is the incoming interface where the
packet arrived. To have a Layer 2 aggregate interface reflect a packet back when it is both the
incoming and outgoing interfaces of that packet, perform this task.
Procedure
1. Enter system view.
system-view
2. Enter Layer 2 aggregate interface view.
interface bridge-aggregation interface-number
3. Enable port bridging.
port bridge enable
By default, port bridging is disabled. A Layer 2 aggregate interface cannot reflect incoming
packets back.
Enabling link-aggregation traffic redirection
About link-aggregation traffic redirection
This feature operates on dynamic link aggregation groups. It redirects traffic on a Selected port to the
remaining available Selected ports of an aggregation group if one of the following events occurs:
• The port is shut down by using the
shutdown command.
• The slot that hosts the port reboots, and the aggregation group spans multiple slots.
NOTE:
The device does not redirect traffic to member ports that become Selected during the traffic
redirection process.
This feature ensures zero packet loss for known unicast traffic, but does not protect unknown unicast
traffic.
You can enable link-aggregation traffic redirection globally or for an aggregation group. Global
link-aggregation traffic redirection settings take effect on all aggregation groups. A link aggregation
group preferentially uses the group-specific link-aggregation traffic redirection settings. If
group-specific link-aggregation traffic redirection is not configured, the group uses the global
link-aggregation traffic redirection settings.
Restrictions and guidelines for link-aggregation traffic
redirection
Link-aggregation traffic redirection applies only to dynamic link aggregation groups.
As a best practice, enable link-aggregation traffic redirection on a per-interface basis. If you enable
this feature globally, communication with a third-party peer device might be affected if the peer is not
compatible with this feature.
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