Alcatel Carrier Internetworking Solutions Switch/Router 사용자 설명서

Page 17-40

The 

 and 

 commands allow you to display and configure the source routing parameters 

for the selected group.

The Service Advertising Protocol (SAP) filter is a method for allowing the user to decide what 
type of source routed packets are allowed to be transmitted out of the switch. When the 
filters are configured, they examine the DSAP (destination) and SSAP (source) fields in an 
outgoing packet, compare them to the filter values to see if they match, and then either 
allows or blocks packet transmission.

There are two types of filters that can be configured: a “permit” filter and a “deny” filter. If a 
packet matches the value in a deny filter, and the value is not 0, then the packet is discarded. 
If a permit filter is configured, and a packet does not match the filter value, then the packet is 
discarded. Only two of each type of filter can be configured.

To use this feature, it must first be enabled, then configured. Once a filter is enabled and 
configured, it can be viewed as part of the source routing statistics. These procedures are 
covered in the following sections:

• For information on enabling the SAP filter see Enabling SAP Filtering on page 17-40.

• For information on configuring SAP filters, see Configuring SAP Filtering on page 17-41.

• For information on viewing SAP filters, see Viewing SAP Filtering on page 17-42.

To use the 

 command to enable SAP filtering, follow the steps below:

1. Enter the 

 command at the system prompt.

2. The following message is displayed:

Enter 

 and press 

.

3. Another message is displayed confirming the activation of the SAP filtering feature: