Cisco Cisco IOS Software Release 12.2

Trellis encoding is disabled by default on the NI-2 card because it is not supported on the 4xDMT 
(ATUC-1-4DMT) line card. However, trellis encoding is supported on the 4xFlexiDMT 
(ATUC-4FLEXIDMT) line card and the 8xDMT (ATUC-1-DMT8 and ATUC-1-DMT8-I) line cards.

For 4xDMT (ATUC-1-4DMT) ports—Disable trellis encoding in the DSL profile for those ports.

For 4xFlexiDMT (ATUC-4FLEXIDMT) ports—Enable trellis encoding, except with ADI chipset-based 
CPEs that use ADI firmware prior to ADI 3.1. This includes all Cisco 677 and Cisco 627 CPEs.

For 8xDMT (ATUC-1-DMT8 and ATUC-1-DMT8-I)

 

ports—The default DMT setting for trellis 

encoding is auto-sense, which means that the 8xDMT line card attempts to automatically configure 
itself for the type of encoding supported on the CPE. If the auto-sense feature does not work, you 
may have to enable trellis encoding in the DSL profile for these ports.

If you are unsure if your CPE supports trellis encoding, check with the manufacturer.

For information about how to change trellis encoding settings on the NI-2 card, see the documentation 
at the following location:

http://www.cisco.com/univercd/cc/td/doc/product/dsl_prod/ios_dsl/rel122/config/04conf04.htm#xtocid1734531

This section describes restrictions on the Cisco NI-2 card IP services.

NI2 IOS releases do not support the following Layer 3 services (or else these services are limited, as 
noted):

IP Quality of Service.

IP Queueing.

IP Multicast.

L2TP Tunnel Priority and Limit sessions.

L2TP Network Server (LNS).

The maximum number of MPLS/VPN for PPPoA terminations is 25 VPNs for PPPoA and 1 VPN 
for PPPoE.

We recommend that you use a virtual template for PPPoX termination rather than a dialer interface.

MPLS LDP protocol is not supported in this release. Use TDP protocol.

Up to 32 subinterfaces can be used for IP termination under the trunk or subtend ports.

Each DSLAM can support up to 50 MPLS VPNs.

MPLS VPN mapping of RFC 1483 routed sessions must not be confused with Integrated Routing and 
Bridging (IRB). IRB is not supported by MPLS VPN mapping of RFC 1483 routed sessions.