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(1)S and contains the following subsections:
There are no new hardware features in Cisco IOS Release 15.1(1)S.
This section describes new and changed features in Cisco IOS Release 15.1(1)S. Some features may be new to Cisco IOS Release 15.1S 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(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, 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/interfaces_modules/shared_port_adapters/configuration/7600series/76cfgeth.html
http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/7600series/76oveth.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/wan/configuration/guide/wan_l2_lcl_swng.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/wan/configuration/guide/wan_l2_lcl_swng.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/atm/configuration/guide/atm_acr_supp_ima.html
For detailed information about this feature, see the documents at the following URLs:
http://www.cisco.com/en/US/docs/ios/bbdsl/configuration/guide/bba_atm_rbe.html
http://www.cisco.com/en/US/tech/tk39/tk48/technologies_configuration_example09186a008009455f.
shtml
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/bfdsvi.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_rt_filter.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 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_chap4.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/interfaces_modules/shared_port_adapters/configuration/7600series/76cfgcep.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/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/mpls/configuration/guide/mp_hspw_for_atm.html
http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/7600series/76ovwsip.html#wp1062432
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap6.html
http://www.cisco.com/en/US/docs/routers/7600/ios/15S/configuration/guide/pfc3mpls.html
For detailed information about this feature, see the documents at the following URLs:
http://www.cisco.com/en/US/docs/ios/cether/configuration/guide/ce_cfm-ieee_mib.html
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 documents at the following URLs:
http://www.cisco.com/en/US/docs/ios/cether/configuration/guide/ce_l2acl-evc.html
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES20_config_guide/baldcfg.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_inter_as_option_b.html
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/bald_qos.html
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES20_config_guide/baldcfg.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/qos/configuration/guide/legacy_qos_cli_deprecation.html
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#wp1710611
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_sw_config.
html
http://www.cisco.com/en/US/docs/routers/7600/ios/15S/configuration/guide/7600_15_0s_book.html
http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/54sg/configuration/guide/channel.
html
For detailed information about this feature, see the documents at the following URLs:
http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/port_level_shaping.html
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/install_config/ES20_config_guide/baldcfg.html
Multicast distribution tree (MDT) groups were selected at random when the traffic passed the threshold and there was a limit of 255 MDTs before they were reused. The MVPN—Data MDT Enhancements feature provides the ability to deterministically map the groups from inside the VPN routing and forwarding (S,G) entry to particular data MDT groups, through an access control list (ACL).
The user can now map a set of VPN routing and forwarding (S,G) to a data MDT group in one of the following ways:
Because the total number of configurable data MDTs is 1024, the user can use this maximum number of mappings in any of the described combinations.
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 documents at the following URLs:
http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/port_level_shaping.html
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/install_config/ES20_config_guide/
baldcfg.html#wp1782690
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/config_rsvp.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/config_rsvp.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/config_rsvp.html
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/qos_rsvp_vrf_lite.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/76cfstm1.html
For detailed information about this feature, see the documents at the following URLs:
http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/service_groups.html
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 documents at the following URLs:
http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/7600series/76ovwpos.html
http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/7600series/76ovwser.html
In Cisco IOS Release 15.1(1)S, the Cisco 7600 series routers support stateful switchover (SSO) mode for ATM Cell Relay over MPLS in port mode.
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
For detailed information about this feature, see the document at the following URL:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES20_config_guide/baldcfg.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(1)S2:
Old Behavior: Intelligent Services Gateway (ISG) applies data from the reauthentication profile to subscriber sessions.
New Behavior: The re-authentication do-not-apply command prevents ISG from applying data from the reauthentication profile to subscriber sessions.
Additional Information: http://www.cisco.com/en/US/docs/ios/isg/command/reference/isg_m1.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: No restrictions was present in the ES+ configuration guide.
New Behavior: The documentation was updated with the following note: “ES+ low queue cards do not support ISG (IP session and PPPoE session).”
Additional Information:
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/
es40_chap4.html#wp1554396
The following behavior changes were introduced in Cisco IOS Release 15.1(1)S1:
Old Behavior: Dynamic entries in the multicast table are not cleared even though the hold time has expired and the ip nhrp map multicast dyn command is disabled, which disables the automatic addition of routers to the multicast mappings by NHRP.
New Behavior: All dynamic entries in the multicast table are now cleared when the hold time has expired and the ip nhrp map multicast dyn command is disabled.
http://www.cisco.com/en/US/docs/ios/ipaddr/command/reference/iad_nhrp.html
Old Behavior: After a reload of a router, some or all of the Border Gateway Protocol (BGP) address families do not come up because the router is receiving messages from a neighbor that the address family identifier (AFI) or subsequent address family identifiers (SAFI) is not supported, and the router does not retry those AFIs. The output of the show ip bgp all command summary shows the address family in NoNeg or idle state, and it will never leave that state. Typical output looks like:
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
x.x.x.x 4 1 0 0 1 0 0 never (NoNeg)
New Behavior: When the router receives a message that the AFI or SAFI is not supported, the router does not drop the rejected AFIs or SAFIs from subsequent OPEN messages. Instead, the router retries the AFI/SAFI within the existing OPEN message retry timing sequence, but with an exponential backoff (stopping at 10 minutes) applied to decisions about whether to include a particular AFI/SAFI in an OPEN message. The timing of OPEN messages is not changed. Successful negotiation of the AFI results in a reset of the backoff sequence for future attempts. Also, when a BGP connection collision occurs with a session in the ESTABLISHED state, BGP sends a CEASE notification on the newly opened connection, and a keepalive message on the old connection. The new connection is closed. If the old session was stale, the keepalive causes it to be closed. The neighbor will retry its OPEN message after receiving the CEASE message and waiting a few seconds.
Old behavior: The summary address is advertised to the peer if the administrative distance is configured as 255.
New behavior: The summary address is not advertised to the peer if the administrative distance is configured as 255.
Old Behavior: The MTU and TTL rate limiters were not enabled by default.
New Behavior: The MTU and TTL rate limiters are enabled by default. The default values are 970 and 97, respectively.
http://www.cisco.com/en/US/docs/routers/7600/ios/12.2SR/configuration/guide/dos.html
#wp1163490
Old Behavior: In a scaled scenario, SIP200_MP-4-PAUSE messages take on substantial logging space and in the process other important logs might get missed.
New Behavior: SIP200_MP-4-PAUSE message to avoid console flooding.
Rate limit SIP200_MP-4-PAUSE ensures that one pause message is logged per unique occurrence across the SIP200 reloads and the subsequent occurrences are only statistically accounted.
http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/
7600series/76tblsip.html
Old Behavior: A fix is required to reduce the Network Processor (NP) reload time.
New Behavior: Network Processor crashinfo is disabled for all Network Processor exceptions by default.
This fix disables crashinfo generation for all SIP400 Network Processor exceptions. This helps in improving the Network Processor reload time.
http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/
7600series/76ovwsip.html
Old Behavior: DHCP server was sending infinite lease time to manual binding clients.
New Behavior: The DHCP server sends a finite lease (the value configured using the lease command in DHCP pool configuration mode) to the clients for which manual bindings are configured.
Old Behavior: Destination-only traffic classes cannot be controlled when more than one protocol is operating at the border routers.
New Behavior: Destination-only traffic classes can be controlled when more than one protocol is operating at the border routers using dynamic policy-based routing (PBR).
http://www.cisco.com/en/US/docs/ios-xml/ios/pfr/command/pfr-cr-book.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