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17-3
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 17 Configuring Signalling Features
Configuring ATM SVC Frame Discard
Example
The following example displays the modified configuration of the signalling IE forwarding:
Switch# more system:running-config
Building configuration...
Current configuration:
!
version XX.X
no service pad
service udp-small-servers
service tcp-small-servers
!
hostname Switch
!
<information deleted>
!
interface ATM0/0/0
no atm signallling ie forward calling-number
no atm signallling ie forward calling-subaddress
no atm signallling ie forward called-subaddress
no atm signallling ie forward higher-layer-info
no atm signallling ie forward lower-layer-info
no atm signallling ie forward blli-repeat-ind
no atm signallling ie forward aal-info
!
<information deleted>
Configuring ATM SVC Frame Discard
You can select the criteria used to install frame discard on switched virtual channels (SVCs). The default
is to install packet discard based on the presence of the ATM adaptation layer 5 (AAL5) information
element in the SETUP message.
Note The term frame discard is referred to as packet discard on ATM switch router virtual circuits.
You can use this global configuration function to modify frame discard for all connections.
To configure frame discard, use the following command in global configuration mode:
This command changes the information that the ATM switch router uses to decide whether or not to
install frame discard on SVCs. User-Network Interface (UNI) 4.0 signalling allows for explicit
signalling of frame discard. Pre-UNI 4.0 versions use the presence of the AAL5 information elements to
determine whether or not to install frame discard. If the AAL5 information element is present, frame
discard is installed; otherwise it is not, as shown in the following example.
Command Purpose
atm svc-frame-discard-on-aal5ie Configures the SVC frame discard.