20-11
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter20 Configuring Frame Relay to ATM Interworking Port Adapter Interfaces
Configuring Frame Relay Frame Size for Frame Relay to ATM Interworking

Displaying Frame Relay Interface Configuration

To display the Frame Relay interface configuration, use the following EXEC command:
Example
The Frame Relay configuration is displayed in the following example:
Switch# more system:running-config
Building configuration...
Current configuration:
!
version 11.3
no service pad
no service password-encryption
!
hostname Switch
!
<information deleted>
!
interface Serial0/1/0:5
no ip address
no ip directed-broadcast
encapsulation frame-relay IETF
no arp frame-relay
frame-relay intf-type nni
<information deleted>
Configuring Frame Relay Frame Size for Frame Relay to ATM Interworking
Frame Relay frame size is one of the parameters in IWF equat ions used for converting Frame Relay
traffic parameters to their equivalent ATM traffic parameters and vice-versa. The default configuration
uses a constant frame size of 250 bytes in the IWF equations. For some Frame Relay network
configurations this could cause problems such as:
Frames being dropped if actual frame size is less than 250 bytes
Wasted bandwidth if actual frame size is greater than 250 bytes
To overcome this problem you can configure the Frame Relay frame size.
If the incoming traffic is always a single frame length, then configure that frame size in the connection
traffic table row (CTTR). However, if the incoming traffic has a varying frame-size, then configure the
Frame Relay CTTR using the highest sustained cell rate (SCR) for a given committed information rate
(CIR) in the corresponding ATM-CTTR. Refer to the section Configuring Frame Relay to ATM
Connection Traffic Table Rows.
Command Purpose
more system:running-config Displays the Frame Relay interface
configuration.