ProLiant BL p-Class GbE Interconnect Switch Command Line Interface Reference Guide

Configuring the GbE Interconnect Switch using the Command Line Interface
Enabling Ingress Filtering on a Per Port Basis
If ingress filtering is enabled for a port, the interconnect switch will examine the VLAN
information in the packet header (if present) and decide whether or not to forward the packet.
The VID should match the PVID of that port, otherwise, that incoming packet is discarded.
If the packet is tagged with VLAN information, the ingress port will first determine if the
ingress port itself is a member of the tagged VLAN.
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If the ingress port is not a member of the tagged VLAN, the packet is dropped.
If the ingress port is a member of the 802.1Q VLAN, the interconnect switch then
determines if the destination port is a member of the 802.1Q VLAN, the packet is
forwarded and the destination port transmits it to its attached network segment.
If the packet is not tagged with VLAN information, the ingress port tags the packet with its
own PVID as a VID (if the port is a tagging port). The interconnect switch then determines if
the destination port is a member of the same VLAN (has the same VID) as the ingress port.
If the destination port is not a member of the same VLAN, the packet is dropped.
If the destination port is a member of the same VLAN, the packet is forwarded and the
destination port transmits it on its attached network segment.
Ingress filtering is used to conserve bandwidth within the interconnect switch by dropping
packets that are not on the same VLAN as the ingress port at the point of reception. This
eliminates the subsequent processing of packets that will just be dropped by the destination
port.
The following shows the factory default setting for ingress filtering:
Feature Default Value
Ingress-filtering Off
Use the following command to enable ingress filtering on a per port basis:
Command Description
ingress-filter enable port <portlist>
Enables ingress filtering on the specified port or
ports
Disabling Ingress Filtering on a Per Port Basis
Use the following command to disable ingress filtering on a per port basis:
Command Description
ingress-filter disable port <portlist>
Disables ingress filtering on a port or ports
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