Cabletron Systems CyberSWITCH CSX150 User Manual

Also see for CyberSWITCH CSX150: User guide Quick start guide

Contents

Small Office Remote Access Switch 209CONFIGURING ADVANCED BRIDGINGBridge FiltersBRIDGE FILTERS B ACKGROUND I NFORMATIONUser-defined bridge filters allow you to filter unwanted traffic out of the network. The followingtable lists the four different types of bridge filters and the maximum number of filters that can beconfigured for each type:Note: If the mode of operation is changed, any previously defined filters will be deleted. Anypreviously defined protocol definitions will remain unchanged.MAC address filters reference either the source or destination MAC address fields in a packet.Protocol filters use the protocol Id field in a packet. Packet data filters reference data outside theaddress and protocol fields in a packet. Each filter has a distribution list that identifies the potentialdestinations for a filtered packet.For each filter category, there are three filtering actions that the system can perform on a packet:discard, forward, or connect.P ROTOCOL D EFINITIONSIf you configure any protocol filters, you must first configure any needed protocol definitions. Afteryou define a protocol filter, it will automatically be assigned a protocol Id. The protocol Id is arequired field when configuring a protocol filter.You can define up to 10 protocol definitions. These definitions represent the protocol Id tokens forthe protocol filter commands to use. Users specify the protocol name, and also the protocol Id valuefor the Ethernet type field and/or the 802.3 LSAP field.Inspecting the 13th and 14th bytes of the MAC frame determines the packet format. These bytes arethe length field in an 802.3 format frame, and are the Ethernet type field in an Ethernet formatframe. If the value of the byte is less than hexadecimal 600, the packet is 802.3 format and the LSAPfield is used for the protocol Id. If the value is greater than or equal to hexadecimal 600, the packetis Ethernet format and the Ethernet type field is used for the protocol Id.Filter Type MaximumNumber of Eachsource MAC addressfilter50destination MACaddress filter50protocol filter 40packet data filter 60hardware filter 63(in manual mode)