• Far end PMON counters are not supported.

• VT PMON is not supported.

• M13 framing (channelized) is not supported on DS3 IM.

• APS is supported across interface modules. But it is not supported on the same interface module.

• VT loopback is not supported if T1 is configured for the VT mode.

• DS1/DS3 SF/SD is not supported.

• Alternate 0's and 1's BERT pattern is not supported for DS1.

• All zeros BERT pattern on system side does not get in sync on DS3.

• DS3/OCx MDL does not interoperate with legacy Q.921 standards.

• APM is not supported with EPAR on CEP.

• FDL is not supported.

• STS24-c is not supported on OCx.

• Port restriction on OCx. If you have OC48 configured on a port, you cannot use the neighboring port.

• Bellcore remote loopbacks are not supported for DS1/DS3. Only T1.403 remote loopbacks are supported.

• DS3 over CEP is not supported on DS3 IM.

• CEP MIB is not supported.

• HSPW is not supported on DS3/DS1/OCX card.

• The ip cef accounting command is not supported on the chassis.

• Crash may be observed on the chassis when EoMPLS, CEM, ATM and IMA Pseudowire Redundancy (PW-redundancy) configurations exist while switchover and fail back of the pseudowires are being triggered, and the show platform hardware pp active pw eompls command is executed.

• Configuration sync does not happen on the Standby RSP when the active RSP has Cisco Software Licensing configured, and the standby RSP has Smart Licensing configured on the chassis. If the active RSP has Smart Licensing configured, the state of the standby RSP is undetermined. The state could be pending or authorized as the sync between the RSP modules is not performed.

• Evaluation mode feature licenses may not be available to use after disabling, and enabling the smart licensing on the Cisco NCS 4206. A reload of the chassis is required.

• Ingress counters are not incremented for packets of the below format on the RSP3 module for the 10 Gigabit Ethernet interfaces, 100 Gigabit Ethernet interfaces, and 40 Gigabit Ethernet interfaces:

  Packet format

  MAC header---->Vlan header---->Length/Type

  When these packets are received on the RSP3 module, the packets are not dropped, but the counters are not incremented.

• UPSR is supported only on VT path and STSnc. It is not supported on T1/T3.

• DCC is supported only on PPP encapsulation. It is not supported on CLNS encapsulation.

• Traffic is dropped when packets of size 64 to 100 bytes are sent on 1G and 10G ports.

  • For 64-byte packets, traffic drop is seen at 70% and beyond of the line rate.

  • For 90-byte packets, traffic drop is seen at 90% and beyond of the line rate.

  • For 95-byte packets, traffic drop is seen at 95% and beyond of the line rate.

  Traffic is dropped when:

  • Traffic is sent on a VRF interface.

  • Traffic is sent across layer 2 and layer 3.

  However, traffic is not dropped when the packet size is greater than 100 bytes, even if the packets are sent bidirectionally at the line rate.

• Effective with Cisco IOS XE Everest 16.6.1, the Port-channel (PoCH) scale is reduced to 24 from 48 for Cisco ASR 900 RSP3 module.

  Note	The PoCH scale for Cisco NCS 4216 routers is 48.

You can use the following commands to verify your software version:

• Consolidated Package—show version

• Individual sub-packages—show version installed (lists all installed packages)

Only Cisco IOS XE 3S consolidated packages can be downloaded from Cisco.com; users who want to run the chassis using individual subpackages must first download the image from Cisco.com and extract the individual subpackages from the consolidated package.

Use the show hw-module all fpd command to display the IM FPGA version on the chassis.

Use the show platform software agent iomd [slot/subslot] firmware cem-fpga command to display the CEM FPGA version on the chassis.

The table below lists the FPGA version for the software releases.

Note	During ISSU, TDM interface modules are reset for FPGA upgrade.

Cisco IOS software images are subject to deferral. We recommend that you view the deferral notices at the following location to determine whether your software release is affected: http://www.cisco.com/en/US/products/products_security_advisories_listing.html.

• Field Notices—We recommend that you view the field notices for this release to determine whether your software or hardware platforms are affected. You can find field notices at http://www.cisco.com/en/US/support/tsd_products_field_notice_summary.html.

• Bulletins—You can find bulletins at http://www.cisco.com/en/US/products/sw/iosswrel/ps5012/prod_literature.html.

The below table summarizes the supported MIBs on the Cisco NCS 4206 and Cisco NCS 4216.

The below table summarizes the unverified and supported MIBs on the Cisco NCS 4206 and Cisco NCS 4216.

For a listing of the license notices for open source software used in Cisco IOS XE 3S Releases, see the documents accessible from the License Information page at the following location:

http://www.cisco.com/en/US/products/ps11174/products_licensing_information_listing.html