The Cisco ASR 920 Series Aggregation Services Routers provide a comprehensive and scalable set of Layer 2 and Layer 3 VPN services in a compact package. They are temperature-hardened, small form factor, with high throughput and low power consumption ideal for mobile backhaul, business services and residential voice, video, and data ("triple-play") applications.

Use the following commands to verify your software version:

• Consolidated Package— show version

• The default command-name command is used to default the parameters under that interface. However, when speed is configured on the interface, the following error is displayed:

  Speed is configured. Remove speed configuration before enabling auto-negotiation

• Adding or deleting the Trunk Ethernet flow points (TEFPs) with scaled bridge-domain, without delay causes the Cisco ASR 920 Series router to crash.

• Virtual services should be deactivated and uninstalled before performing replace operations.

• The Cisco ASR920 Series Routers no longer support the controller and nid-controller commands for the Cisco ME1200 switch.

• The following interface modules (IMs) do not require the activation command for IM boot up, provided no other IM is activated in subslot 0/1 before.

  However, if an IM was activated in the system earlier, deactivate the previously-activated IM before inserting a new IM in system.

  • 16-Port T1/E1 Interface Module

  • 32-Port T1/E1 Interface Module

  • 8-Port T1/E1 Interface Module

  • 4-port OC3/STM-1 (OC-3) or 1-port OC12/STM-4 (OC-12) Interface Module

  • 14-Port Serial Interface Module

  • 6-Port E and M Interface Module

  • 4-Port C37.94 Interface Module

• RS422 works on ports from 0 to 7 only.

• The following restriction is applicable only to:

  • Cisco ASR-920-24SZ-IM, Cisco ASR-920-24SZ-M, and Cisco ASR-920-24TZ-M

  • Cisco ASR-920-20SZ-M

    • 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.

• MPLS VC label packet with time-to-live (TTL) value of 2 is dropped at egress MPLS PE device due to ASIC limitations. During PHP process, MPLS TTL value for the VC label is decremented by one with implicit-null. The VC label-related TTL value is set to 255 while imposing the VC label due to multiple VC switching scenarios.

  Use the no mpls ip propagate-ttl command as the Short Pipe mode for the required label.

• Interface naming is from right to left. For more information, see the Cisco ASR 920 SoftwareConfiguration Guide .

• Packet size greater than 1460 is not supported over IPsec Tunnel.

• Minimal traffic drop might be seen for a moment when higher rate traffic is sent through the IPsectunnels for the first time.

• IPsec is only supported for TCP and UDP and is not supported for SCTP.

• IPSec is supported only on the Cisco ASR-920-12SZ-A and Cisco ASR-920-12SZ-D routers.

• 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.

To view supported MIB, go to http://tools.cisco.com/ITDIT/MIBS/MainServlet.

For a list of accessibility features in Cisco ASR 920 Series Routers, see the Voluntary Product Accessibility Template (VPAT) on the Cisco website, or contact accessibility@cisco.com.

All product documents are accessible except for images, graphics, and some charts. If you would like to receive the product documentation in audio format, braille, or large print, contact accessibility@cisco.com.