The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
These release notes describe the following topics:
This section lists the new hardware and software features supported by Cisco IOS Release 15.1(2)S and contains the following subsections:
This section describes new and changed features in Cisco IOS Release 15.1(2)S. Some features may be new to Cisco IOS Release 15.1(2)S 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 15.1(2)S. 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.
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/Hardware/15_0s/7600_hwd.html
For detailed information about this feature, see the documents at the following URLs:
http://www.cisco.com/en/US/docs/routers/7600/Hardware/15_0s/7600_hwd.html
http://www.cisco.com/en/US/docs/routers/7600/Hardware/
Module_and_Line_Card_Installation_Guides/ES40_Line_Card_Installation_Guide/es40_chap2.html
This section describes new and changed features in Cisco IOS Release 15.1(2)S. Some features may be new to Cisco IOS Release 15.1(2)S 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 15.1(2)S. 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.
For detailed information about this feature, see the documents at the following URLs:
http://www.cisco.com/en/US/docs/ios/iproute_bfd/configuration/guide/irb_bfd.html
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap4.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/iproute_bfd/configuration/guide/irb_bfd.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/iproute_rip/configuration/guide/irr_bfd_ripv2.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap4.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/iproute_bgp/configuration/guide/irg_consistency_check.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/iproute_bgp/configuration/guide/irg_neighbor.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-mptcl_bgp.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap4.
html#wp1607509
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/cether/configuration/guide/ce_cfm_nsnhsby.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/7600series/76ovwcep.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/netmgmt/configuration/guide/nm_ios_shell.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap4.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-dhcp.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-dhcp.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap7.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/iproute_eigrp/configuration/guide/ire_cfg_eigrp.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/netmgmt/configuration/guide/nm_eem_3.2.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios-xml/ios/ipsla/configuration/15-1s/
Configuring_IP_SLAs_Metro-Ethernet_3.0_ITU_T_Y.1731_Operations.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap4.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_mtu_cmd_changes.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/iproute_isis/configuration/guide/irs_ipv4_lfafrr.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap7.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/ios/15S/configuration/guide/7600_15_0s_book.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios-xml/ios/mp_l2_vpns/configuration/15-1s/mp-any-transport.html
The IEEE Standard PTPv2 1588-2008 defines a protocol that enables precise synchronization of clocks in measurement and control systems implemented with packet-based networks. This MIB supports the Precision Timing Protocol version 2 (PTPv2) feature of Cisco System devices.
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use the Cisco MIB Locator found at the following URL:
For detailed information about this feature, see the documents at the following URLs:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES20_config_guide/baldcfg.html
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap6.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/iproute_ospf/configuration/guide/iro_cfg.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/technical_references/7600_mib_guides/
MIB_Guide_ver_6/mibgde6.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap13.
html#wp1517497
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap4.html
For detailed information about this feature, see the documents at the following URLs:
http://www.cisco.com/en/US/docs/ios/sec_user_services/configuration/guide/sec_secure_shell_v2.
html
http://www.cisco.com/en/US/docs/ios/sec_user_services/configuration/guide/sec_secure_shell_v2.html
http://www.cisco.com/en/US/docs/ios/security/configuration/guide/sec_secure_shell_v2.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap4.
html#wp1607509
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap13.
html#wp1517497
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap13.
html#wp1517497
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/interface/configuration/guide/ir_synce.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap10.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/cether/configuration/guide/ce_y1731-perfmon.html
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use the Cisco MIB Locator found at the following URL:
http://tools.cisco.com/ITDIT/MIBS/servlet/index
If the Cisco MIB Locator does not support the MIB information that you need, you can also obtain a list of supported MIBs and download MIBs from the Cisco MIBs page at the following URL:
http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml
To access the Cisco MIB Locator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions found at this URL:
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 standalone document. When behavior changes are introduced, existing documentation is updated with the changes described in these sections:
The following behavior changes were introduced in Cisco IOS Release 15.1(2)S2:
Old Behavior: When the neighbor prefix-length-size command is configured in the L2VPN VPLS address family, if that neighbor has a peer policy or route map that is removed, the neighbor prefix-length-size command setting is also removed.
New Behavior: When the neighbor prefix-length-size command is configured in the L2VPN VPLS address family, the value of that command overrides the value set for the peer-group. If the command is locally configured for the peer, it will not be inherited from the peer-group.
Old Behavior: The show bgp ipv4 unicast summary command displays an incorrect number of dynamically created neighbors per address family if a peer-group has been removed from the configuration.
New Behavior: The show bgp ipv4 unicast summary command displays the correct number of dynamically created neighbors, even if a peer-group has been removed. The output displays the number of dynamically created neighbors per address family, and at the end of output, displays the total number of dynamically created neighbors on the router.
Old Behavior: Prior to RLS10/SRE4 release, the SPA-1xCHOC12/DS0 SPA boots up with the old controller status. If it was not admin down, it will start with no admin down and interfaces comes up as soon as the spa boots up.
New Behavior: Effective from Cisco IOS Release 15.1(3)S and 12.2(33)SRE5, the SPA-1xCHOC12/DS0 boots up with admin down status and the original SPA status is restored after one second of the SPA bootup. Wait for a second after the log message “SPA_OIR-6-ONLINECARD: SPA (SPA-1XCHOC12/DS0) online in subslot” is displayed to configure the SPA.
http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/
7600series/76ovwser.html
Old Behavior: Bidirectional Forwarding Detection (BFD) for Pseudowire Virtual Circuit Connectivity Verification (VCCV) does not support User Datagram Protocol (UDP).
New Behavior: When BFD for Pseudowire VCCV is used, Cisco IOS incorrectly advertises support for User Datagram Protocol (UDP) encapsulation, even if you specify the vccv bfd template name raw-bfd command. Only PW-ACH (raw) encapsulation is supported. This could cause interoperability issues if the peer attempts to use UDP encapsulation. Cisco IOS-IOS connectivity is not affected. Further, the udp keyword for the vccv bfd template command has no effect. Only raw BFD is used.
The following behavior changes were introduced in Cisco IOS Release 15.1(2)S1:
Old Behavior: Input service policies attached to a main interface or a subinterface are not implemented for PPPoE client traffic. Only input service policies attached to a dialer interface are implemented.
New Behavior: Input service policies attached to a main interface or a subinterface are implemented for PPPoE client traffic but only if an input service policy is not configured for a dialer interface. If an input service policy is configured for a dialer interface, the old behavior is retained. Only the quality of service (QoS) counters for packet classification are supported. Counters for packet dropping, packet marking, and policing actions are not supported and are ignored.
Old Behavior: By default, both IPv6 and IPv4 capability is exchanged with a BGP peer that has an IPv6 address. When an IPv6 peer is configured, that neighbor is automatically activated under the IPv4 unicast address family.
New Behavior: Starting with new peers being configured, an IPv6 neighbor is no longer automatically activated under the IPv4 address family. You can manually activate the IPv6 neighbor under the IPv4 address family if you want. If you do not want an existing IPv6 peer activated under the IPv4 address family, you can manually deactivate the peer with the no neighbor ipv6-address activate command. Until then, existing configurations that activate an IPv6 neighbor under the IPv4 unicast address family will continue to try to establish a session.
http://www.cisco.com/en/US/docs/ios/iproute_bgp/configuration/guide/irg_basic_net.html
Old Behavior: Routing protocols do not purge routes when an interface goes down. This is the default behavior.
New Behavior: Routing protocols purge routes when an interface goes down. This is the default behavior.
Additional Information: http://www.cisco.com/en/US/docs/ios/iproute_pi/command/reference/iri_pi1.html#wp1013065
Old Behavior: The client name “xconnect” appears in the show bfd neighbors command output.
New Behavior: The “xconnect” client name is replaced with “AToM” in the show bfd neighbors command output.
Additional Information: http://www.cisco.com/en/US/docs/ios/iproute_pi/command/reference/iri_book.html
Old Behavior: No restrictions were present in the ES+ Configuration guide.
New Behavior: Updated the documentation with “ES+ low queue cards do not support ISG (IP session and PPPoE session)” note.
http://www.cisco.com/en/US/docs/routers/7600/install_config/
ES40_config_guide/es40_chap4.html#wp1554396
Old Behavior: We can add only two members to the port-channel access type subinterface.
New Behavior: We can add multiple members to the port-channel access type subinterface if the ISG is not configured.
Additional Information:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/
es40_chap4.html#wp1554373
Old Behavior: You cannot use mod3/mod4 policies with service fragments and/or fragment classes on Ethernet interface types other than Gigabit Ethernet and port-channel.
New Behavior: You can use mod3/mod4 policies with service fragments and/or fragment classes on all Ethernet interface types.
Additional Information: http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/qos_policies_agg.html
Cisco IOS software images are subject to deferral. Cisco recommends that you view the deferral notices at the following location to determine if your software release is affected:
http://www.cisco.com/en/US/products/products_security_advisories_listing.html