Cisco Cisco IOS Software Release 12.0(33)S

Following are the prerequisites for configuring IPHC on FR interfaces:

Supported Cisco Series of Routers: Support for this feature is added to Cisco 12000 series routers 
from this release.

Supported Cisco IOS Release: This feature is supported only on Cisco IOS Release 12.0(33)S2. 

Supported line card (LC): Line card supporting IPHC over FR feature is SIP-401/501/601.

Supported SPAs:

Channelized SPAs—

8-port Channelized T1/E1 SPA

2-port and 4-port Channelized T3 SPA

1-port Channelized OC-3/STM-1 SPA.

Non-channelized SPAs—

2-port and 4-port Clear Channel T3/E3 SPA.

Supported Interface Type: The interface type on which this feature can be configured is FR 
interfaces.

Supported Encapsulation Type: Cisco encapsulation type is the only encapsulation type on which 
this feature can be configured.

Following are the restrictions for configuring IPHC on FR interfaces:

IPHC Over FR feature is supported only on Engine 5 based SIP-401/501/601. It is not supported on 
SIP-600.

This feature is not supported on Cisco IOS Releases 12.0(32)SY and 12.0(32)S.

This feature can be enabled only on point-to-point FR subinterfaces.

This feature is supported only on SPAs listed in section 

Configuring the CLIs for enabling IPHC on FR interfaces with FR encapsulation format other than 
Cisco format (like IETF, SNAP) will result in rejection of CLI and displaying of error message.