Cross-Platform Release Notes for Cisco IOS Release 15.3M&T
Release 15.3(1)T New Features and Important Notes
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Table of Contents

Features and Important Notes for Cisco IOS Release 15.3(1)T

Contents

New and Changed Information

New Hardware Features Supported in Cisco IOS Release 15.3(1)T4

New Software Features Supported in Cisco IOS Release 15.3(1)T4

New Hardware Features Supported in Cisco IOS Release 15.3(1)T3

New Software Features Supported in Cisco IOS Release 15.3(1)T3

New Hardware Features Supported in Cisco IOS Release 15.3(1)T2

New Software Features Supported in Cisco IOS Release 15.3(1)T2

New Hardware Features Supported in Cisco IOS Release 15.3(1)T1

New Software Features Supported in Cisco IOS Release 15.3(1)T1

New Hardware Features Supported in Cisco IOS Release 15.3(1)T

High Density FXS Module Support on Cisco ISR G2

New Software Features Supported in Cisco IOS Release 15.3(1)T

AutoInstall Support for TCL Script

BGP—Add Path

BGP—Attribute Filter and Enhanced Attribute Error Handling

BGP—mVPN SAFI-129 IPv6

BGP Support for IP Prefix Export from a VRF Table into the Global Table

Cisco Data Collection Manager

CUBE Serviceability

Cisco VG350 No Payload Encryption (NPE) Image

Diffserv MIB

EIGRP IPv6 MIBs

Flexible NetFlow—Classification/MQC Integration

Flexible NetFlow—IPFIX Export Format

Flow Metadata IPv6 Support

HSRP-Aware PIM

IP SLA—OnDemand UDP Probes

ISIS BFD TLV

ISIS Client for BFD C-Bit Support

ISIS IPv6 Client for BFD

LISP Delegate Database Tree (DDT)

LISP Host Mobility Across Subnet

LISP Security (LISP-Sec)

MACE Phase-2 Enhancements

MediaTrace 3.0 —MIB, IPv6, MIB Profiles, and Reverse MediaTrace

Metadata Spectacle Integration Phase-1

MVPNv6

NAT TCP SIP ALG Support

NBAR2 Custom Protocol

NETCONF XML PI

OSPFv3 Retransmission Limits

OSPFv3 RFC 3101 Support

PfR Bandwidth Visibility Distribution for xDSL Access

PIM Allow RP

Protocol Pack Licensing

Shaping on Dialer Interface

TTL Security Support for OSPF on IPv6

Important Notes

Cisco IOS Behavior Changes

Cisco IOS Release 15.3(1)T1

Field Notices and Software-Related Tools and Information

Features and Important Notes for Cisco IOS Release 15.3(1)T

New and Changed Information

This section lists the new hardware and software features supported by Cisco IOS Release 15.3M&T and contains the following subsections:


NoteA cumulative list of all new and existing features supported in a release, including platform and software image support, can be found in Cisco Feature Navigator at A cumulative list of all new and existing features supported in a release, including platform and software image support, can be found in Cisco Feature Navigator at http://www.cisco.com/go/cfn.


New Hardware Features Supported in Cisco IOS Release 15.3(1)T4

There are no new hardware features in Cisco IOS Release 15.3(1)T4.

New Software Features Supported in Cisco IOS Release 15.3(1)T4

There are no new software features in Cisco IOS Release 15.3(1)T4.

New Hardware Features Supported in Cisco IOS Release 15.3(1)T3

There are no new hardware features in Cisco IOS Release 15.3(1)T3.

New Software Features Supported in Cisco IOS Release 15.3(1)T3

There are no new software features in Cisco IOS Release 15.3(1)T3.

New Hardware Features Supported in Cisco IOS Release 15.3(1)T2

There are no new hardware features in Cisco IOS Release 15.3(1)T2.

New Software Features Supported in Cisco IOS Release 15.3(1)T2

There are no new software features in Cisco IOS Release 15.3(1)T2.

New Hardware Features Supported in Cisco IOS Release 15.3(1)T1

There are no new hardware features in Cisco IOS Release 15.3(1)T1.

New Software Features Supported in Cisco IOS Release 15.3(1)T1

There are no new software features in Cisco IOS Release 15.3(1)T1.

New Hardware Features Supported in Cisco IOS Release 15.3(1)T

This section describes new and changed features in Cisco IOS Release 15.3(1)T. Some features may be new to Cisco IOS Release 15.3(1)T but were released in earlier Cisco IOS software releases. Some features may have been released in earlier Cisco IOS software releases and have been changed in Cisco IOS Release 15.3(1)T. To determine if a feature is new or changed, see the feature information table at the end of the feature module for that feature. Links to feature modules are included. If a feature does not have a link to a feature module, that feature is documented only in the release notes, and information about whether the feature is new or changed will be available in the feature description provided.

High Density FXS Module Support on Cisco ISR G2

The High Density FXS Module Support on Cisco ISR G2 feature provides High Density FXS module support for the Cisco ISR G2.

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/routers/access/vg350/hardware/installation/guide/vg350_hig.html

New Software Features Supported in Cisco IOS Release 15.3(1)T

This section describes new and changed features in Cisco IOS Release 15.3(1)T. Some features may be new to Cisco IOS Release 15.3(1)T but were released in earlier Cisco IOS software releases. Some features may have been released in earlier Cisco IOS software releases and have been changed in Cisco IOS Release 15.3(1)T. To determine if a feature is new or changed, see the feature information table at the end of the feature module for that feature. Links to feature modules are included. If a feature does not have a link to a feature module, that feature is documented only in the release notes, and information about whether the feature is new or changed will be available in the feature description provided.

BGP—Add Path

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_bgp/configuration/15-mt/irg-additional-paths.html

BGP—Attribute Filter and Enhanced Attribute Error Handling

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_bgp/configuration/15-mt/irg-attribute-filter.html

BGP—mVPN SAFI-129 IPv6

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_bgp/configuration/15-mt/irg-mvpn-safi-ipv6.html

BGP Support for IP Prefix Export from a VRF Table into the Global Table

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_bgp/configuration/15-mt/irg-prefix-export.html

CUBE Serviceability

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/voice/cube_mgmt/configuration/15-mt/voi-cube-serviceability.html

Cisco VG350 No Payload Encryption (NPE) Image

The Cisco VG350 No Payload Encryption (NPE) Image feature provides a Cisco IOS image for the Cisco VG350 without payload encryption (NPE).

Diffserv MIB

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/qos_dfsrv/configuration/15-mt/qos-dfsrv-mib.html

EIGRP IPv6 MIBs

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_eigrp/configuration/15-2mt/ire-mib.html

Flexible NetFlow—Classification/MQC Integration

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/fnetflow/configuration/guide/15-mt/fnf-fnf-mqc.html

Flow Metadata IPv6 Support

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/mdata/command/mdata-cr-book.html

HSRP-Aware PIM

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/ipmulti_pim/configuration/15-mt/imc_hsrp_aware.html

IP SLA—OnDemand UDP Probes

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/ipsla/configuration/15-mt/sla_udp_ondemand.html

ISIS BFD TLV

The IS-IS Bidirectional Forwarding Detection (BFD) Tag Length Value (TLV) feature provides a faster method to detect a loss of an IS-IS adjacency. Before, when an IS-IS adjacency reached the UP state (and therefore could be used for forwarding), a BFD session needed to be established with that neighbor. Now, a BFD session is maintained as long as the hello holddown timer for the neighbor does not expire, which is new for BFD TLV. The BFD session is only deleted if the neighbor hello times out. If BFD signals to IS-IS that a session has gone DOWN, the adjacency associated with that session will transition to DOWN state. Once the BFD session goes back UP, the adjacency state can transition back to an UP state.

For a given IS-IS topology, IS-IS determines if BFD is usable for a given neighbor on that topology. BFD is not usable when BFD is enabled on both sides and the BFD session is down. When there are multiple BFD sessions enabled for different address families, such as IPv4 and IPv6, if BFD is not usable for any address family, then BFD is consider not usable for the entire adjacency on that topology. For example, if both IPv4 and IPv6 BFD are enabled for single topology, if either the IPv4 BFD session is down or IPv6 BFD session is down, the neighbor state will be set to DOWN state. If BFD is not enabled for a given address family, then BFD is considered usable for that address family.

For single topology mode, the neighbor state is down when either the IPv4 or IPv6 BFD session is not BFD usable, that is, if BFD is enabled on both sides and the BFD session is DOWN. If BFD is not enabled on either side, BFD will be set to TRUE. For multi-topology mode, IS-IS adjacency will be in UP state as long as any topology is UP . However, the neighbor for the topology where BFD is consider not usable is considered down for that specific topology. For example, if both IPv4 and IPv6 BFD are enabled, and the IPv4 session is DOWN and IPv6 session is UP, then the IS-IS adjacency is still UP. In this case, the IPv4 neighbor is considered DOWN and ipv6 neighbor is considered UP.

ISIS Client for BFD C-Bit Support

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_bfd/configuration/15-mt/irb-bfd-isis-cbit.html

ISIS IPv6 Client for BFD

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_bfd/configuration/15-mt/ip6-bfd-isis-client.html

LISP Delegate Database Tree (DDT)

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_lisp/configuration/15-mt/irl-ddt.html

LISP Host Mobility Across Subnet

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_lisp/configuration/15-mt/irl-host-mob.html

LISP Security (LISP-Sec)

The LISP Security (LISP-Sec) feature enables a set of security mechanisms that provide origin authentication, integrity, and anti-replay protection for map-request/map-reply mapping resolution exchanges.

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_lisp/command/ip-lisp-cr-book.html

MACE Phase-2 Enhancements

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/avc/configuration/15-mt/cfg-avc-mace.html

MediaTrace 3.0 —MIB, IPv6, MIB Profiles, and Reverse MediaTrace

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/media_monitoring/configuration/15-mt/mm-mediatrace.html

Metadata Spectacle Integration Phase-1

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/mdata/configuration/15-mt/metadata-framework.html

MVPNv6

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/ipmulti_mvpn/configuration/15-mt/imc_mvpnv6.html

NAT TCP SIP ALG Support

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/ipaddr_nat/configuration/15-mt/nat-tcp-sip-alg.html

NBAR2 Custom Protocol

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/qos_nbar/configuration/15-mt/nbar2-custom-protocl.html

NETCONF XML PI

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/cns/configuration/15-mt/cns-netconf.html

OSPFv3 Retransmission Limits

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_ospf/configuration/15-mt/iro-15-mt-book.html

OSPFv3 RFC 3101 Support

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_ospf/configuration/15-mt/iro-cfg.html

PfR Bandwidth Visibility Distribution for xDSL Access

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/pfr/configuration/15-mt/pfr-band-vis.html

PIM Allow RP

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/ipmulti_pim/configuration/15-mt/imc_pim_allowrp.html

Protocol Pack Licensing

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/qos_nbar/configuration/15-mt/NBAR_Protocol_Pack.html

Shaping on Dialer Interface

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/qos_conavd/configuration/15-mt/qos-conavd-dial.html

TTL Security Support for OSPF on IPv6

For detailed information about this feature, see the following document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_ospf/configuration/15-mt/iro-ttl-sec-ospfv3.html

Important Notes

The following information applies to all releases of Cisco IOS Release 15.3M&T.

Cisco IOS Behavior Changes

Behavior changes describe the minor modifications to the way a device works that are sometimes introduced in a new software release. These changes typically occur during the course of resolving a software defect and are therefore not significant enough to warrant the creation of a stand-alone document. When behavior changes are introduced, existing documentation is updated with the changes described in this section.

Behavior changes are provided for the following releases:

Cisco IOS Release 15.3(1)T1

The following behavior changes are introduced in Cisco IOS Release 15.3(1)T1:

  • The aaa accounting delay-start extended-time command is introduced to add Framed-IP-Address to the accounting start packets in the dual stack scenario.

Old Behavior: The RADIUS attribute 8 (Framed-IP-Address) is not included in the accounting start packets in the following two scenarios:

– The user is a dual-stack (IPv4 or IPv6) subscriber.

– The IP address is from a local pool and not from the RADIUS server.

New Behavior: The aaa accounting delay-start extended-time command is introduced to delay the accounting start records for the configured time (in seconds) after the IPCPv6 address is sent to the RADIUS server. During this configured delay time, the IPCPv4 address is sent and the Framed-IPv4-Address is added to the accounting start record. If the IPCPv4 address is not sent in the configured delay time, the accounting start record is sent without the Framed-IPv4-Address.

Additional Information: http://www.cisco.com/en/US/docs/ios-xml/ios/security/a1/sec-a1-cr-book.html

  • Position of MP_REACH Attribute in Attributes List of BGP Updates

Old Behavior: If the BGP Enhanced Attribute Error Handling feature is enabled, BGP places the MP_REACH attribute (attribute 14) at the beginning of the attributes list while formatting an update. If the feature is not enabled, BGP places the MP_REACH attribute at the end of the attributes list, which makes handling a malformed update more difficult for neighbor routers that are doing enhanced error handling.

New Behavior: Whether or not the BGP Enhanced Attribute Error Handling feature is enabled, BGP places the MP_REACH attribute (attribute 14) at the beginning of the attributes list while formatting an update. Enhanced error handling can function much more easily when the MP_REACH attribute is at the beginning of the attributes list.

  • The extended keyword is added to the show waas status command.

Old Behavior: The show waas status command displays the status of Wide Area Application Services (WAAS) Express.

New Behavior: The extended keyword is added to the show waas status command. The extended keyword provides complete information for WAAS Express.

Additional Information: http://www.cisco.com/en/US/docs/ios/wan/command/reference/wan_s2.html#wp1101997

Field Notices and Software-Related Tools and Information

We recommend that you view the field notices for this release to see if 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.

Visit the Software Center/Download Software page on Cisco.com to subscribe to Cisco software notifications, locate MIBs, access the Software Advisor, and find other Cisco software-related information and tools. Access the Download Software page at http://www.cisco.com/cisco/software/navigator.html?a=a&i=rpm .