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 on different platforms in Cisco IOS Release 15.4(1)S and contains the following subsections:
There are no new hardware features in Cisco IOS Release 15.4(1)S2.
There are no new software features in Cisco IOS Release 15.4(1)S2.
There are no new hardware features in Cisco IOS Release 15.4(1)S1.
There are no new software features in Cisco IOS Release 15.4(1)S1.
There are no new hardware features in Cisco IOS Release 15.4(1)S.
This section describes new and changed features in Cisco IOS Release 15.4(1)S. Some features may be new to Cisco IOS Release 15.4(1)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 15.4(1)S. Links to feature modules are included. If a feature listed does not have a link to a feature module, that feature is documented only in the release notes.
For detailed information about this feature, see the following document:
http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_bgp/configuration/15-s/bgp-l3vpn-evpn-rr-support.html
For detailed information about this feature, see the following document:
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 following document: http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_bgp/configuration/15-s/irg-bgp-rtc-for-legacy-pe.html
The BGP Graceful Shutdown (GSHUT) Enhancement feature enables graceful shutdown of either all neighbors or only virtual routing and forwarding (VRF) neighbors across BGP sessions. The following command has been introduced in this feature: bgp graceful-shutdown all.
The BGP Monitoring Protocol (BMP) feature enables configuration and monitoring of BMP servers, establishing connection with the BMP clients, and monitoring and reporting of all configured BGP neighbors. The following commands were added or modified for this feature:
1. The “bmp-activate” keyword was added to the neighbor command.
3. The bmp server command was added to enable bmp-server configuration sub-mode under router configuration mode.
For detailed information about this feature, see the following document:
http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/install_upgrade/7600series/SIP-SSC-SPA-HW-Install.html
For detailed information about this feature, see the following document:
http://www.cisco.com/en/US/docs/ios-xml/ios/mtr/configuration/15-s/vrf-support-mtr.html
For detailed information about this feature, see the following document:
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 following document:
http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_isis/configuration/15-s/irs-uloop-local-avoid.html
For detailed information about this feature, see the following document:
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 following document:
http://www.cisco.com/en/US/docs/ios-xml/ios/mtr/configuration/15-s/vrf-support-mtr.html
The Multi-Topology BGP with VRF enhancement feature enables multi- topology BGP routing in VRF. There are no new BGP commands introduced or modified for this feature. If multi-topology BGP is configured, the address-family (ipv4 | ipv6) multicast command under a specific “vrf definition” is used for configuration; else all multicast VRF activity is configured using the address-family (ipv4 | ipv6) command under “vrf definition”.
For detailed information about this feature, see the following document:
http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_ospf/configuration/15-s/iro-ospfv2-ip-frr.html
For detailed information about this feature, see the following document:
http://www.cisco.com/en/US/docs/routers/7600/ios/15S/configuration/guide/isis_lfa_ipfrr.html
The VRF aware BGP translate-update feature enables customer devices, that contain an old version of Cisco software that does not support multicast BGP routing, to advertise its routes to multicast VRF-Lite, multicast VPN for VPNv4 and VPNv6 neighbors, as well as through IPv6 over IPv4 tunnel. The “neighbor” command is modified to include the “translate-update” keyword that enables this feature and applies only to the VRF address families.
For detailed information about hardware and software features supported on Cisco ASR 901 Series Routers in Cisco IOS Release 15.4(1)S, see the following document:
http://www.cisco.com/en/US/docs/wireless/asr_901/Release/Notes/asr901_rn_15_4_1_S.html
For detailed information about hardware and software features supported on Cisco ASR 901 S Series Routers in Cisco IOS Release 15.4(1)S, see the following document:
http://www.cisco.com/en/US/docs/wireless/asr_901s/rn/b_release_notes_for_asr901s.html
For detailed information about hardware and software features supported on Cisco ME 3600x and Cisco ME 3800x Series Routers in Cisco IOS Release 15.4(1)S, see the following document:
http://www.cisco.com/en/US/docs/switches/metro/me3600x_3800x/software/release/15.4_1_S/release/notes/ol31008.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 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 email to cco-locksmith@cisco.com. An automatic check will verify that your email address is registered with Cisco.com. If the check is successful, account details with a new random password will be emailed to you. Qualified users can establish an account on Cisco.com by following the directions found at this URL:
The following sections contain important notes about Cisco IOS Release 15.4S: