Cabletron Systems 04-0053-01 ATM Address Filter Example, Source and Destination Address Masks

Port ATM Address Filters ATM Filtering and Clocking

8.1.3ATM Address Filter Example

The following is an example of creating a filter, a filter set, and assigning the filter set to an incoming and outgoing port.

1.Use the add atmfilter command to create filters on source and/or destination addresses

SmartSwitch #	add atmfilter
FilterName(FILTER1)		: Domain1
Src-ATMAddr()		: 39:00:00:00:00:00:00:00:00:00:1d:a3:

44:00:1d:a3:44:20:11:00

SrcAddrMask(FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF):

Dst-ATMAddr():39:00:00:00:00:00:00:00:00:00:1d:b4:

d5:00:1d:b4:d5:14:31:00

DstAddrMask(FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF):

FilterType()	: deny
SmartSwitch #
SmartSwitch # add atmfilter
FilterName(FILTER2)	: domain2
Src-ATMAddr()	: 39:00:00:00:00:00:00:00:00:00:1d:71:
04:00:1d:71:04:55:36:00
SrcAddrMask(FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF):
Dst-ATMAddr()	: 39:00:00:00:00:00:00:00:00:00:1d:7a:
12:00:1d:7a:12:01:57:00
DstAddrMask(FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF):
FilterType()	: deny

SmartSwitch #

2.Use the add atmfilterset command to create a filter set that uses the filters domain1 and domain2

SmartSwitch # add atmfilterset
FilterSetName(SET1)	: Denied_domains
FilterName()	: domain1
FilterName()	: domain2
FilterName()	:	— Press the Enter key when finished specifying filters

Created Filter Set (Denied_domains) With 2 Filters

SmartSwitch #

3.Use the create portfilterset command to assign the filter set to an incoming and outgoing port.

SmartSwitch # create portfilterset
InComingPort()	: 8a1
OutGoingPort()	:	8a2
FilteSetName()	:	Denied_domains

SmartSwitch #

Once the filter set is assigned to the incoming and outgoing ports, any call setup attempted through ports 8a1 and 8a2 are rejected if they contain the source and destination addresses specified in the filters domain1 and domain2.

Source and Destination Address Masks

When creating an ATM address filter, the add atmfilter command prompts for an address mask (SrcAddrMask and DstArrdMask). When an entity attempts a call through a port, the address masks determines which bits of the addresses presented by the entity are to be compared against which bits of the ATM addresses specified in the filter. This bit-filtering is performed by applying the mask to both the call’s address and the specified address in the filter.

8-2 SmartSwitch ATM User Guide