Cisco IOS XE 3S Release Notes
Release 3.4S Features and Important Notes
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New Features in and Important Notes About Cisco IOS XE 3.4S Releases

Table Of Contents

New Features in and Important Notes About Cisco IOS XE 3.4S Releases

New and Changed Information

New Hardware Features in Cisco IOS XE Release 3.4.6S

New Software Features in Cisco IOS XE Release 3.4.6S

New Hardware Features in Cisco IOS XE Release 3.4.5S

New Software Features in Cisco IOS XE Release 3.4.5S

New Hardware Features in Cisco IOS XE Release 3.4.4S

New Software Features in Cisco IOS XE Release 3.4.4S

New Hardware Features in Cisco IOS XE Release 3.4.3S

New Software Features in Cisco IOS XE Release 3.4.3S

IPv6 ACL Extensions for Hop by Hop Filtering

New Hardware Features in Cisco IOS XE Release 3.4.2S

New Software Features in Cisco IOS XE Release 3.4.2S

New Hardware Features in Cisco IOS XE Release 3.4.1S

New Software Features in Cisco IOS XE Release 3.4.1S

New Hardware Features in Cisco IOS XE Release 3.4.0S

New Software Features in Cisco IOS XE Release 3.4.0S

Application Visibility and Control

ASR1K Frame Relay—Multilink (MLFR-FRF.16)

ASR1K IPSec VPN Scaling Enhancement

AToM Load Balancing with Single PW

BFD Support for IP Tunnel (GRE, with IP address)

BGP Diverse Path Using Diverse-Path-RR

BGP Enhanced Route Refresh

Capabilities Manager

CEM Support for SPA-24CHT1-CE-ATM on ASR1K

Cisco TrustSec SGT Exchange Protocol (SXP) IPv4

Cisco TrustSec SGT Handling—L2 SGT Imposition and Forwarding

Domain Stripping at Server Group Level

Dynamic VTI QoS

EIGRP Wide Metrics

ERSPAN Support on Tunnel Interface

EVC MIB

FNF—Account on Resolution

FNF—Export on Transaction End

FNF—Flow-Based Sampling

FNF—Usage and Transaction Record Support

GPRS Tunneling Protocol Support

In Service One-Shot Software Upgrade Procedure

IP Multicast Dynamic NAT

IPv4 Loop-Free Alternate Fast-Reroute

IPv6 Load Balancing on GEC

IPv6 Multicast VRF Lite

IPv6 Virtual Fragmentation Reassembly

ISG IPv6 Support

Limiting Resource Usage

MLP on LNS

MLPoA and MLPoEoA—PTA

MLPoE at PTA

Multicast Service Reflection

NBAR Categorization and Attributes

NBAR Classification Enhancements

NBAR Flow Capacity CLI

OSPFv2 Loop Free Alternate Fast Reroute

OSPFv3 Address Families

OSPFv3 External Path Preference Option (RFC 5340 from RFC 2328 16.4.1)

OSPFv3 max-metric router-lsa

PfR Data Export v1.0 (NetFlow v9 Format)

PfR RSVP Control

PfR/RSVP CAC Integration

PIMv6—Anycast RP Solution

Policy Accounting—COA Ordering

Protection Against Distributed Denial of Service Attacks

Proxy Mobile IPv6 Support for MAG Functionality

QoS Demarcation Enhancements

SDP Editing Using Script-Based Editors

SPA-4XOC3-POS-V2

SRTP Support for RTCP Multiplexed with RTP and for SSRC-Based Multiplexing

Stateful NAT64 ALG—Stateful FTP64 ALG Support

Stateful Network Address Translation 64

Support Termination and Generation of RTCP on DSP SPA

TFTP IPv6 Support

Important Notes

Deferrals

Field Notices and Bulletins

Important Notes About IPSec Support on the Cisco ASR 1000 Series Router

NAT and Firewall ALG Support on the Cisco ASR 1000 Series Routers

Important Notes About Cisco IOS XE Release 3.4.1S

BGP Scan Time Range

Important Notes About Cisco IOS XE Release 3.3.1S

Important Notes About Cisco IOS XE Release 3.3.0S

High Availability on SBC

IPsec Failover

Important Notes About Cisco IOS XE Release 3.2.1S

EzVPN Support on Cisco ASR 1000 Series Routers

Maximum IP MTU for Loopback Interfaces

Important Notes About Cisco IOS XE Release 3.2.0S

Cisco ASR 1001-4XT3

SIP Trunk Over TCP

TCP Failover in Hardware High-Availability Mode

Extended ACL as a WCCP Redirect ACL

Important Notes About Cisco IOS XE Release 3.1.1S

SIP-40G:SPA-4XT-SERIAL

Important Notes About Cisco IOS XE Release 3.1.0S

Bidirectional Forwarding Detection (BFD)

DMVPN Spoke Support

Important Notes About Cisco IOS XE Release 2.6.0

Per-User Attribute on PPP Virtual Access

Legacy QoS Command Deprecation: Hidden Commands

VRF-Aware NAT

Important Notes About Cisco IOS XE Release 2.5.0

Embedded Packet Capture

QoS: Policing Support for GRE Tunnels

QoS: Support for GRE/sVTI Tunnel

VRF-Aware NAT

Important Notes About Cisco IOS XE Release 2.3.0

Any Transport Over MPLS (AToM) Support

MPLS TE Support

VRF-Aware NAT

Important Notes About Cisco IOS XE Release 2.2.2

SSO for L2TP Tunnel Switching Not Supported

VRF-Aware NAT

Important Notes About Cisco IOS XE Release 2.2.1

100M FX SFP Not Supported on Cisco 2-Port Gigabit Ethernet Shared Port Adapter

Intelligent Service Gateway (ISG) Features Not Supported

Per-Session Multicast Support

VRF-Aware NAT

Important Notes About Cisco IOS XE Release 2.1.1

Startup Configuration File Backup

VRF-Aware NAT

Important Notes About Cisco IOS XE Release 2.1.0

High-Level Feature Sets Not Supported for the Cisco ASR 1000 Series Routers


New Features in and Important Notes About Cisco IOS XE 3.4S Releases


This chapter provides information about the new features introduced in the Cisco IOS XE 3.4S releases. In addition, important notes about these releases are included in this chapter.

Cisco IOS XE 3S releases inherit all Cisco IOS XE Release 2 features that were released prior to the introduction of the Cisco IOS XE 3S releases with few exceptions. For information about inherited features that were introduced in Cisco IOS XE Release 2 releases, for a list of new and changed features, and for important notes that apply to Cisco IOS XE Release 2, see the "New and Changed Information" section in Cisco IOS XE Release 2 Release Notes.

This chapter contains the following sections:

New and Changed Information

Important Notes

New and Changed Information

The following sections list the new hardware and software features that are supported by the Cisco ASR 1000 Series Routers for Cisco IOS XE Release 3.4S:

New Hardware Features in Cisco IOS XE Release 3.4.6S

New Software Features in Cisco IOS XE Release 3.4.6S

New Hardware Features in Cisco IOS XE Release 3.4.5S

New Software Features in Cisco IOS XE Release 3.4.5S

New Hardware Features in Cisco IOS XE Release 3.4.4S

New Software Features in Cisco IOS XE Release 3.4.4S

New Hardware Features in Cisco IOS XE Release 3.4.3S

New Software Features in Cisco IOS XE Release 3.4.3S

New Hardware Features in Cisco IOS XE Release 3.4.2S

New Software Features in Cisco IOS XE Release 3.4.2S

New Hardware Features in Cisco IOS XE Release 3.4.1S

New Software Features in Cisco IOS XE Release 3.4.1S

New Hardware Features in Cisco IOS XE Release 3.4.0S

New Software Features in Cisco IOS XE Release 3.4.0S

New Hardware Features in Cisco IOS XE Release 3.4.6S

There are no new hardware features introduced in Cisco IOS XE Release 3.4.6S.

New Software Features in Cisco IOS XE Release 3.4.6S

There are no new software features introduced in Cisco IOS XE Release 3.4.6S.

New Hardware Features in Cisco IOS XE Release 3.4.5S

There are no new hardware features introduced in Cisco IOS XE Release 3.4.5S.

New Software Features in Cisco IOS XE Release 3.4.5S

There are no new software features introduced in Cisco IOS XE Release 3.4.5S.

New Hardware Features in Cisco IOS XE Release 3.4.4S

There are no new hardware features introduced in Cisco IOS XE Release 3.4.4S.

New Software Features in Cisco IOS XE Release 3.4.4S

There are no new software features introduced in Cisco IOS XE Release 3.4.4S.

New Hardware Features in Cisco IOS XE Release 3.4.3S

There are no new hardware features introduced in Cisco IOS XE Release 3.4.3S.

New Software Features in Cisco IOS XE Release 3.4.3S

The following are the new software features introduced in Cisco IOS XE Release 3.4.3S.

IPv6 ACL Extensions for Hop by Hop Filtering

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/ipv6/configuration/xe-3s/ip6-acl-ext-hbh-xe.html

New Hardware Features in Cisco IOS XE Release 3.4.2S

There are no new hardware features introduced in Cisco IOS XE Release 3.4.2S.

New Software Features in Cisco IOS XE Release 3.4.2S

There are no new software features introduced in Cisco IOS XE Release 3.4.2S.

New Hardware Features in Cisco IOS XE Release 3.4.1S

There are no new hardware features introduced in Cisco IOS XE Release 3.4.1S.

New Software Features in Cisco IOS XE Release 3.4.1S

There are no new software features introduced in Cisco IOS XE Release 3.4.1S.

New Hardware Features in Cisco IOS XE Release 3.4.0S

Cisco IOS XE Release 3.4.0S supports GLC-ZX-SMD SFP module. For detailed information on the GLC-ZX-SMD SFP module, see the following Cisco document:

http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/install_upgrade/ASR1000/asr_sip_spa_hw.html

New Software Features in Cisco IOS XE Release 3.4.0S

The following are the new software features introduced in Cisco IOS XE Release 3.4.0S.

Application Visibility and Control

For detailed information, see the following Cisco documents:

http://www.cisco.com/en/US/docs/ios-xml/ios/avc/configuration/xe-3s/avc-xe-3s-book.html

https://www.cisco.com/en/US/docs/ios/fnetflow/command/reference/fnf_book.html

ASR1K Frame Relay—Multilink (MLFR-FRF.16)

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/wan/configuration/guide/wan_ml_fr_frf161_xe.html

ASR1K IPSec VPN Scaling Enhancement

In Cisco IOS IOS XE Release 3.4S, IPSec VPN scaling was enhanced as shown in the following table:

Use Case
Maximum Deployable Target
General Deployable Target

S2S: Static Crypto Map

8,000

8,000

dVTI

4,000

2,000

DMVPN/BGP

4,000

4,000

DMVPN/EIGRP

4,000

4,000


Maximum DeployableTarget (MDT) represents the maximum scaling performance and is achievable only in certain configurations and is supported only for specific configurations and profiles on RP2/ESP20 hardware. The scaling performance may be less on other hardware platforms

General Deployable Target (GDT), represents the generally applicable scaling performance with common, though not all, feature combinations.

Limitations:

The maximum number of crypto subinterface, crypto map, crypto spd for site-2-site IPSec is 4,000.

The maximum IPsec sessions per interface is 4,000.

At setup time, the tunnels per second (TPS) rate is expected to be lower (about 50 TPS) for high scaling numbers.

Occasional high CPU usage (>=95%) is observed on both RP and FP when a session establishes at scaling. IKE call admission from 30-50 may help relieve the stress, but this is not guaranteed.

For dVTI scaling, the ISAKMP in-negotiation-sa CAC should be configured around 30.

ATM Support for SPA-2CHT3-CE-ATM on ASR1K

For detailed information, see the following Cisco documents:

http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/
ASR1000/asrovwceop.html

http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/
ASR1000/asrcfgceop.html

AToM Load Balancing with Single PW

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/mpls/configuration/guide/mp_any_transport_xe.html

BFD Support for IP Tunnel (GRE, with IP address)

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/iproute_bfd/configuration/guide/irb_bfd_xe.html

BGP Diverse Path Using Diverse-Path-RR

For detailed information, see the following Cisco documents:

http://www.cisco.com/en/US/docs/ios/ios_xe/iproute_bgp/configuration/guide/irg_diverse_path_xe.
html

http://www.cisco.com/en/US/docs/ios/ios_xe/iproute_bgp/configuration/guide/irg_best_external_xe.
html

BGP Enhanced Route Refresh

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/iproute_bgp/configuration/guide/irg_enhan_route_
refresh_xe.html

Capabilities Manager

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/saf/configuration/xe-3s/saf-xe-3s-book.html

CEM Support for SPA-24CHT1-CE-ATM on ASR1K

For detailed information, see the following Cisco documents:

http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/
ASR1000/asrovwceop.html

http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/
ASR1000/asrcfgceop.html

Cisco TrustSec SGT Exchange Protocol (SXP) IPv4

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/sec_usr_cts/configuration/xe-3s/sec-usr-cts-xe-3s-book.html

Cisco TrustSec SGT Handling—L2 SGT Imposition and Forwarding

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/sec_usr_cts/configuration/xe-3s/sec-cts-xe-3s-book.
html

Domain Stripping at Server Group Level

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/sec_usr_aaa/configuration/xe-3s/
sec-usr-aaa-xe-3s-book.html

Dynamic VTI QoS

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/qos_classn/configuration/xe-3s/qos-classn-ipm-dvti.
html

EIGRP Wide Metrics

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_eigrp/configuration/xe-3s/Configuring_EIGRP.html

ERSPAN Support on Tunnel Interface

In Cisco IOS XE Release 3.4S the following ERSPAN enhancements were added:

Support was added for the following types of tunnel interface as source ports for a source session:

GRE

mGRE

SVTI

PinIP

Pv6

Pv6 over IP tunnel

Note that GRE, mGRE, SVTI, and IPinIP tunnel interfaces support monitoring of both IPSec protected and non-IPSec protected tunnel packets. This means that you should see the clear-text tunnel packet after IPSec decryption if that tunnel is IPSec protected.

For IPv6 and IPv6 over IP tunnel interfaces, only monitoring of non-IPSec protected tunnel packets is supported.

This feature applies only to ERSPAN source sessions, not to ERSPAN destination sessions.

The tunnel keyword was added to the source interface command.

Cisco IOS XE Reease 3.4S introduces the following behavior changes in ERSPAN:

The tunnel interface is removed from the ERSPAN database at all levels when the tunnel interface is deleted.

If you want to create the same tunnel again, you must manually configure it in source monitor sessions in order to keep monitoring the tunnel traffic.

The Layer 2 Ethernet header is feature generated with both source and destination MAC address set to zero.

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/lanswitch/configuration/xe-3s/lnsw-conf-erspan.html

EVC MIB

For detailed information, see the following Cisco documents:

http://www.cisco.com/en/US/docs/routers/asr1000/mib/guide/asr1mib3.html

http://www.cisco.com/en/US/docs/ios/12_2sr/release/notes/122SRrn.html

FNF—Account on Resolution

For detailed information, see the following Cisco documents:

http://www.cisco.com/en/US/docs/ios-xml/ios/avc/configuration/xe-3s/avc-xe-3s-book.html

https://www.cisco.com/en/US/docs/ios/fnetflow/command/reference/fnf_book.html

FNF—Export on Transaction End

For detailed information, see the following Cisco documents:

http://www.cisco.com/en/US/docs/ios-xml/ios/avc/configuration/xe-3s/avc-xe-3s-book.html

https://www.cisco.com/en/US/docs/ios/fnetflow/command/reference/fnf_book.html

FNF—Flow-Based Sampling

For detailed information, see the following Cisco documents:

http://www.cisco.com/en/US/docs/ios-xml/ios/avc/configuration/xe-3s/avc-xe-3s-book.html

https://www.cisco.com/en/US/docs/ios/fnetflow/command/reference/fnf_book.html

FNF—Usage and Transaction Record Support

For detailed information, see the following Cisco documents:

http://www.cisco.com/en/US/docs/ios-xml/ios/avc/configuration/xe-3s/avc-xe-3s-book.html

https://www.cisco.com/en/US/docs/ios/fnetflow/command/reference/fnf_book.html

GPRS Tunneling Protocol Support

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/sec_data_zbf/configuration/xe-3s/conf-gprs-tunn-prot.
html

In Service One-Shot Software Upgrade Procedure

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/routers/asr1000/configuration/guide/chassis/issu.html#wp1217956

IP Multicast Dynamic NAT

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/ipaddr_nat/configuration/xe-3s/iadnat-multicast-dynamic.html

IPv4 Loop-Free Alternate Fast-Reroute

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_pi/configuration/xe-3s/iri-ip-lfa-frr.html

IPv6 Load Balancing on GEC

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/lanswitch/configuration/xe-3s/lnsw-vlan-map-gig.html

IPv6 Multicast VRF Lite

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/ipv6/configuration/guide/ip6-multicast_xe.html

IPv6 Virtual Fragmentation Reassembly

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/ipv6/configuration/guide/ip6-nat_trnsln_xe.html

ISG IPv6 Support

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/isg/configuration/xe-3s/isg-ipv6.html

Limiting Resource Usage

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/routers/asr1000/configuration/guide/sbcu/sbc_pol.html

MLP on LNS

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/wan/configuration/guide/wan_cfg_mlppp_conn_xe.html

MLPoA and MLPoEoA—PTA

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/wan/configuration/guide/wan_cfg_mlppp_conn_xe.html

MLPoE at PTA

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/wan/configuration/guide/wan_cfg_mlppp_conn_xe.html

Multicast Service Reflection

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/ipmulti_serv/configuration/xe-3s/imc_service_reflect.
html

NBAR Categorization and Attributes

For detailed information, see the following Cisco documents:

http://www.cisco.com/en/US/docs/cable/serv_exch/serv_control/broadband_app/sceasr/rel10x/sceasr_sol/cfg_AVC.html

http://www.cisco.com/en/US/docs/ios-xml/ios/qos_nbar/configuration/xe-3s/
Classifying_Network_Traffic_Using_NBAR_in_Cisco_IOS_XE_Software.html

NBAR Classification Enhancements

For detailed information, see the following Cisco documents:

http://www.cisco.com/en/US/docs/cable/serv_exch/serv_control/broadband_app/sceasr/rel10x/
sceasr_sol/cfg_AVC.html

http://www.cisco.com/en/US/docs/ios-xml/ios/qos_nbar/configuration/xe-3s/
Classifying_Network_Traffic_Using_NBAR_in_Cisco_IOS_XE_Software.html

NBAR Flow Capacity CLI

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/cable/serv_exch/serv_control/broadband_app/sceasr/rel10x/
sceasr_sol/cfg_AVC.html

OSPFv2 Loop Free Alternate Fast Reroute

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_ospf/configuration/xe-3s/iro-lfa-frr-xe.html

OSPFv3 Address Families

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/ipv6/configuration/guide/ip6-ospf_xe.html

OSPFv3 External Path Preference Option (RFC 5340 from RFC 2328 16.4.1)

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/ipv6/configuration/guide/ip6-ospf_xe.html

OSPFv3 max-metric router-lsa

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/ipv6/configuration/guide/ip6-ospf_xe.html

PfR Data Export v1.0 (NetFlow v9 Format)

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/pfr/configuration/xe-3s/pfr-netflow-v9.html

PfR RSVP Control

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/qos_rsvp/configuration/xe-3s/pfr-rsvp.html

PfR/RSVP CAC Integration

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/pfr/configuration/xe-3s/pfr-rsvp.html

PIMv6—Anycast RP Solution

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/ipv6/configuration/guide/ip6-multicast_xe.html

Policy Accounting—COA Ordering

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/qos_plcshp/configuration/xe-3s/qos-plcshp-xe-3s-book.html

Protection Against Distributed Denial of Service Attacks

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/sec_data_zbf/configuration/xe-3s/sec-ddos-attack-prevn.html

Proxy Mobile IPv6 Support for MAG Functionality

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ios_xe/ipmobility/configuration/guide/pmipv6_mag_support.
html

QoS Demarcation Enhancements

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/routers/asr1000/configuration/guide/sbcu/sbc_qos.html

SDP Editing Using Script-Based Editors

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/routers/asr1000/configuration/guide/sbcu/sbc_sip_profiles.html

SPA-4XOC3-POS-V2

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/ASR1000/ASRspasw.html

SRTP Support for RTCP Multiplexed with RTP and for SSRC-Based Multiplexing

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/routers/asr1000/configuration/guide/sbcu/sbc_secure_media.html

Stateful NAT64 ALG—Stateful FTP64 ALG Support

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/ipaddr_nat/configuration/xe-3s/iadnat-stateful-nat64.
html

Stateful Network Address Translation 64

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios-xml/ios/ipaddr_nat/configuration/xe-3s/iadnat-stateful-nat64.
html

Support Termination and Generation of RTCP on DSP SPA

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/
ASR1000/ASRovdsp.html

TFTP IPv6 Support

For detailed information, see the following Cisco document:

http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-mng_apps.html

Important Notes

The following sections contain important notes about Cisco IOS XE 3S Releases running on Cisco ASR 1000 Series Routers.

Deferrals

Cisco IOS software images are subject to deferral. We recommend that you view the deferral notices at the following location to determine whether your software release is affected:

http://www.cisco.com/en/US/products/products_security_advisories_listing.html

Field Notices and Bulletins

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.

Important Notes About IPSec Support on the Cisco ASR 1000 Series Router

This section contains important notes about IPSec support on the Cisco ASR 1000 Series Router:

IPSec CLI Support Notes

This section contains important notes about IPSec CLI support on the Cisco ASR 1000 Series Router.

For information about Cisco IOS IPSec commands, see Cisco IOS Security Command Reference at the following location:

http://www.cisco.com/en/US/docs/ios/security/command/reference/sec_book.html

The show crypto engine command, which displays information about the crypto engine, is not currently supported on the Cisco ASR 1000 Series Router. The unsupported show crypto engine subcommands include the following:

accelerator (Shows crypto accelerator information.)

brief (Shows all crypto engines in the system.)

configuration (Shows crypto engine configuration.)

connections (Shows connection information.)

qos (Shows QoS information.)

The Cisco ASR 1000 Series Router does not currently support the display of send and recv error statistics using the show crypto ipsec sa identity command.

The Cisco ASR 1000 Series Router does not support the clear and show crypto commands on the standby Route Processor (RP) by design.

Counters in the show platform software ipsec fp active flow identifier n command are flagged for reset on read. You can use the show crypto ipsec sa command to obtain integral counters.

The show access-list command output does not show a packet count matching the ACL.

The Cisco ASR 1000 Series Router displays debugging information about the consumption of IPsec datapath memory; use the show platform hardware qfp act feature ipsec datapath memory command in privileged EXEC or diagnostic mode.

The Cisco ASR 1000 Series Router displays debugging information about the crypto engine processor registers; use the show platform software ipsec f0 encryption-processor registers command in privileged EXEC or diagnostic mode.

IPsec Support on Cisco ASR 1000 Series Routers

This section contains important notes about IPsec Support on the Cisco ASR 1000 Series Router:

After a rekey or after configuration of an IPsec tunnel, IPsec chunk SPI allocations keep increasing and are not freed until the number of allocations reaches ten. The SPI allocations are freed automatically after the number of allocations reaches ten.

Crypto Map Support

This section contains important notes about IPSec crypto map support on the Cisco ASR 1000 Series Router:

The Cisco ASR 1000 Series Router does not currently support IPSec tunnel configuration for crypto maps with same IP address on both the tunnel interface and the physical interface. Configurations with different IP addresses are supported.

A possible Embedded Services Processor (ESP) reload may occur if a large number (such as 2000) of crypto maps are removed simultaneously. When removing a large number of crypto maps, it is recommended you unconfigure 500 crypto maps at a time and wait 25 seconds between operations.

The Cisco ASR 1000 Series Router does not support the show access-lists id command under crypto maps.

The Cisco ASR 1000 Series Router does not currently support the interface range command when configuring crypto maps.

IPSec Packet Processing

This section contains important notes about IPSec packet processing on the Cisco ASR 1000 Series Router:

Reloading an Embedded Services Processor (ESP) on the Cisco ASR 1000 Series Router may cause a few IPSec packets to drop before the initialization completes, but the traffic will resume after a brief interval.

The Cisco ASR 1000 Series Router will not discard an incoming IP datagram containing a Payload Length other than 4 in the authentication header (AH). For example, a 96 bit authentication value plus the 3 32-bit word fixed portion for any non-null authentication algorithm will not be discarded.

The Cisco ASR 1000 Series Router does not forward incoming authenticated packets with the IP option field set.

GET VPN Support

This section contains important notes about Group Encrypted Transport VPN (GET VPN) support on the Cisco ASR 1000 Series Router:

To ensure normal traffic flow for a GET VPN configuration on a Cisco ASR 1000 Series Router, a Time Based Anti Replay (TBAR) window-size of greater than 42 seconds is recommended.

The Cisco ASR 1000 Series Router does not currently support the TBAR statistics display in the show crypto gdoi gm replay command.

The Cisco ASR 1000 Series Router does not currently support Easy VPN (EzVPN) and GET VPN on the same interface.

When a Cisco ASR 1000 Series Router is to apply the same Group Domain of Interpretation (GDOI) crypto maps to two interfaces, you should use local addresses for the crypto maps. Non-local address configuration is not supported.

The Cisco ASR 1000 Series Router does not currently support transport mode for TBAR.

The Cisco ASR 1000 Series Router only supports the reassembly of post-fragmented GET VPN packets that are destined for the local Cisco ASR 1000 Series Router in the GET VPN network

An enhancement is added to enable reassembly of IPsec transit traffic. This enhancement applies only to post-encryption fragmented IPsec packets. When this enhancement is enabled, IPsec will detect transit IPsec traffic and reassemble it before decryption. GET VPN transit IPsec traffic will be reassembled, decrypted, and forwarded to the destination. Non GET VPN transit IPsec traffic will be reassembled but not decrypted (because the Cisco ASR 1000 router is not the IPsec tunnel end point) and then forwarded to the destination.

To enable IPsec reassembly of transit traffic, use the platform ipsec reassembly transit command in global configuration mode. To disable IPsec reassembly of transit traffic, use the no form of this command.

platform ipsec reassembly transit

[no] platform ipsec reassembly transit

IPSec SSO and ISSU Support Notes

The Cisco ASR 1000 Series Router supports stateful IPSec sessions on ESP switchover. During ESP switchover, all IPSec sessions will stay up and no user intervention is needed to maintain IPSec sessions.

For an ESP reload (no standby ESP), the SA sequence number restarts from 0. The peer router drops packets that do not have the expected sequence number. User may need to explicitly reestablish IPSec sessions to work around this issue for systems that have a single ESP after an ESP reload. User may experience traffic disruption over the IPSec sessions in such cases for the duration of the reload.

The Cisco ASR 1000 Series Router currently does not support Stateful Switchover (SSO) IPSec sessions on Route Processors (RPs). The IPSec sessions will go down on initiation of the switchover, but will come back up when the new RP becomes active. No user intervention is needed. User will experience traffic disruption over the IPSec sessions for the duration of the switchover, until the sessions are back up.

The Cisco ASR 1000 Series Router currently does not support stateful ISSU for IPSec sessions. Before performing an ISSU, users must explicitly terminate all existing IPSec sessions or tunnels prior to the operation and reestablish them post ISSU. Specifically, users must ensure that there are no half-open or established IPSec tunnels present before performing ISSU. To do this, we recommend user do a interface shutdown in the case of interfaces that may initiate a tunnel setup, such as a routing protocol initiating a tunnel setup, or interfaces that have keepalive enabled or where there is an auto trigger for an IPSec session. Traffic disruption over the IPSec sessions during ISSU is obvious in this case.

Summarizing Caveats

ESP—Switchover (with standby ESP):Stateful:IPSec sessions should be up. No user intervention needed.

ESP—Reload (no standby ESP):Stateless:IPSec sessions will go down and come back. Usually, no user intervention is needed. However, users may have to explicitly re-establish an IPsec session if antireplay is configured (sequence number checking).

RP—Switchover (with standby RP):Stateless:IPSec sessions will go down on RP switchover and the session should re-establish automatically when the new RP gains an active role. No user intervention is needed.

ISSU (irrespective of chassis type):Stateless:Users must explicitly terminate all the IPSec sessions by shutting the interfaces, perform ISSU, and then re-establish tunnels by enabling the interfaces. No other intervention is needed.

Miscellaneous IPSec Support Notes

This section contains miscellaneous important notes about IPSec support on the Cisco ASR 1000 Series Router:

In the context of an IPSec DVTI connection, the Cisco ASR 1000 Router does not support dynamic download ACL rule (per-user attribute) from the AAA server.

For example, the following configurations are not supported:

cisco-avpair += "ip:inacl#1=permit ip any 2.2.2.0 0.0.0.255"
cisco-avpair += "ip:outacl#1=permit ip 2.2.2.0 0.0.0.255 any"
 
   

The Cisco ASR 1000 Router does not support the command of "if-state nhrp" in configuring the tunnel.

The Cisco ASR 1000 Router Dead Peer Detection behavior is different than the pre-defined behavior (i.e. when there is no traffic to be sent, no DPD is sent, while if any traffic to be sent, DPD is sent). A Cisco ASR 1000 Router DPD is sent out regardless there is outbound traffic needs to be sent out.

The Cisco ASR 1000 Router does not support SA Path MTU on data path.

The Cisco ASR 1000 Router does not support double ACL in dynamic crypto map.

VRF without crypto map configured on a physical interface causes dual esp reload on a Cisco ASR 1000 Router.

The command: show crypto ipsec sa identity does not log send and receive error counts.

The commands: clear crypto and show crypto on Standby RP are inconsistent with Active RP. At present most of other features disable 'clear commands' from Standby RP, but IPSec still allows to clear sa, session etc. from the standby.

The Cisco ASR 1000 Router does not support Cisco AAA av-pair "cisco-avpair += ip:sub-policy-In=policy1".

CLI allows both ikev1 and ikev2 profile configured under the same crypto map, even though it is not supported internally on the ASR 1000 Router.

For a Cisco ASR 1000 Router, the tunnel protection should be removed first before changing any configuration for tunnel protection.

The security association (SA) maximum transmission unit (MTU) calculation is based on the interface MTU instead of the IP MTU.

The Cisco ASR 1000 Series Router currently supports a maximum anti-replay window value of 512. If you attempt to configure a value larger than 512, the Cisco ASR 1000 Series Router defaults back to 512 internally (although the display still shows your user-configured value).

The Cisco ASR 1000 Series Router does not currently support nested SA transformation such as:

crypto ipsec transform-set transform-1 ah-sha-hmac esp-3des esp-md5-hmac 
crypto ipsec transform-set transform-1 ah-md5-hmac esp-3des esp-md5-hmac 
 
   

The Cisco ASR 1000 Series Router does not currently support Cisco IOS Certificate Authority (CA) server features.

The Cisco ASR 1000 Series Router does not currently support COMP-LZS configuration.

On Cisco ASR 1000 Series Routers, when configuring GRE over IPSec, it is recommended that you use only the tunnel protection mode on the tunnel interface. Using crypto maps on both the tunnel interface and the physical interface to achieve GRE over IPSec is not the supported method of configuration.

When using dynamic VTI-based IPSec on a Cisco ASR 1000 Router, if there are multiple remote IPSec endpoints behind the same NAT device, only one of the endpoints has connectivity. In other words, multiple endpoints cannot have connectivity at the same time.

NAT and Firewall ALG Support on the Cisco ASR 1000 Series Routers

NAT and Firewall ALG Support on Cisco ASR 1000 Series Routers matrix summarizes Network Address Translation (NAT) and Firewall Application Layer Gateway (ALG) feature support on Cisco ASR 1000 Series Routers in Cisco IOS XE  Release 2.1.0 and later releases. The matrix lists feature support by release. NAT and Firewall ALG support is cumulative; features introduced in earlier releases continue to be supported in later releases. You can find the matrix at the following location:

http://www.cisco.com/en/US/docs/routers/asr1000/technical_references/asr1000alg_support.pdf

Important Notes About Cisco IOS XE Release 3.4.1S

This section provides important notes about Cisco IOS XE Release 3.4.1S.

BGP Scan Time Range

The bgp scan-time command has a scanner-interval range of 5-60 seconds. The bgp scan-time command can be configured, even if BGP Next Hop Tracking (NHT) is configured (by the bgp nexthop command).

Important Notes About Cisco IOS XE Release 3.3.1S

This section provides important notes about Cisco IOS XE Release 3.3.1S.

Broadband Encapsulation Autosense Support Notes

This section contains important notes about the support for broadband encapsulation autosense with RBE configuration in Cisco IOS XE Release 3.3.1S:

The broadband encapsulation autosense enhancement enables broadband autosense support for PPPoEoA, PPPoA, and RBE.

In the Cisco IOS XE releases prior to Release 3.3.1S, aal5autoppp encapsulation was not supported when an RBE was configured. As a result, the combination of aal5autoppp encapsulation with RBE was not supported in the Cisco IOS XE releases prior to Release 3.3.1S.

The broadband encapsulation enhancment in Cisco IOS XE Release 3.3.1S supports the combination of aal5autoppp encapsulation with RBE-related configurations.

Important Notes About Cisco IOS XE Release 3.3.0S

This section provides important notes about Cisco IOS XE Release 3.3.0S and later releases.

High Availability on SBC

The following is the expected behavior of a session border controller (SBC) on which the High Availability feature is configured:

If switchover occurs while an H.323-H.323 T.38 fax transmission is in progress, the call does not fall back to the voice mode after the completion of the fax transmission. This is because the signaling state is not preserved in the event of a switchover.

IPsec Failover

IPSec failover is a feature that increases the total uptime (or availability) of your IPSec network. Traditionally, this is accomplished by employing a redundant (standby) router in addition to the original (active) router. If the active router becomes unavailable for any reason, the standby router takes over the processing of IKE and IPSec.

IPSec failover falls into two categories: stateless failover and stateful failover. The IPsec on the Cisco ASR 1000 Series Router supports only stateless failover. Stateless failover uses protocols such as the Hot Standby Router Protocol (HSRP) to provide primary to secondary cutover and also allows the active and standby VPN gateways to share a common virtual IP address.

Important Notes About Cisco IOS XE Release 3.2.1S

This section describes important notes about Cisco IOS XE Release 3.2.1S and later releases.

EzVPN Support on Cisco ASR 1000 Series Routers

On a ASR Cisco 1000 Router, when an EzVPN session is ended, the EzVPN server sends out a Stop Accounting message. This message does not contain the Acct-Input-Octets, Acct-Output-Octets, Acct-Input-Packets, and Acct-Output-Packets fields. It might cause a disruption of accounting performed on traffic.

Maximum IP MTU for Loopback Interfaces

For loopback interfaces, the maximum IP MTU is now 4000. This is to match the serial interface limits.

Important Notes About Cisco IOS XE Release 3.2.0S

This section describes important notes about Cisco IOS XE Release 3.2.0S and later releases.

Cisco ASR 1001-4XT3

Cisco ASR1001-4XT3 chassis functionality is similar to the SPA-4XT3/E3 with the exception of E3 circuitry in Cisco IOS XE 3.2.0S Release.

SIP Trunk Over TCP

SIP TCP trunk calls may not activate if more than one complete SIP messages were contained in one TCP segment in Cisco IOS XE 3.2.0S Release.

This symptom occurs upon SIP trunk over TCP scenario. SIP ALG currently processes only one complete SIP message in one TCP segment (one complete or one complete plus one incomplete), refer to CSCti56370.

TCP Failover in Hardware High-Availability Mode

TCP failover is not supported in Hardware High-Availability mode. If the active node fails in Hardware High Availability mode and if the network is restored, it may take 5 to 10 minutes for the standby node to become the active node. This is because of the reboot and the peer negotiation delay. If the network is not restored, only the switched over active peer is available. Failover is not possible in this state.

Extended ACL as a WCCP Redirect ACL

The Cisco ASR 1000 Series Router supports the use of an extended ACL as a WCCP redirect ACL. However, the option to specify a port range is not supported.

Important Notes About Cisco IOS XE Release 3.1.1S

This section describes important notes about Cisco IOS XE Release 3.1.1S and later releases.

SIP-40G:SPA-4XT-SERIAL

Cisco SPA-4XT-SERIAL was not supported in 3.1.0S when plugged into an ASR1000 with SIP-40. This SPA is supported in Release 3.1.1S on SIP-40 linecard.

For more information, see the following documents:

Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Hardware Installation, see section for SPA-4XT-Serial SPA in Table 1-4 (SIP and SPA Compatibility for Serial SPAs).

http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/install_upgrade/ASR1000/asr_sip_spa_hw.html

Cisco ASR1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide

http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/ASR1000/ASRspasw.html

Important Notes About Cisco IOS XE Release 3.1.0S

This section describes important notes about Cisco IOS XE Release 3.1.0S and later releases.

Bidirectional Forwarding Detection (BFD)

In Cisco IOS XE Release 3.1.0S, Bidirectional Forwarding Detection (BFD) is no longer supported in IP Base software packages. For BFD support, use the Advanced IP Services or Advanced Enterprise Services packages.

DMVPN Spoke Support

In Cisco IOS XE Release 3.1.0S Cisco ASR 1000 Series Routers do not support the ip nhrp server-only command if they act as DMVPN spokes.

Important Notes About Cisco IOS XE Release 2.6.0

This section describes important notes about Cisco IOS XE Release 2.6.0 and later releases.

Per-User Attribute on PPP Virtual Access

In Cisco IOS XE Release 2.6.0 multiple instances of the per-user attribute `Cisco-Avpair=lcp:interface-config=<cmd>' is not supported.

For example:

Cisco-AVPair = lcp:interface-config=ip vrf forwarding vpngreen

Cisco-AVPair= lcp:interface-config=ip unnumbered loopback2

Should be configured like this in Cisco IOS XE Release 2.6.0:

Cisco-AVPair = lcp:interface-config=ip vrf forwarding vpngreen \nip unnumbered loopback2

"Multiple instances will be supported in Cisco IOS XE Release 2.6.1"

Legacy QoS Command Deprecation: Hidden Commands

To streamline Cisco IOS QoS (quality of service), certain commands are being hidden. Although these commands are available in Cisco IOS XE Release 2.6, the CLI interactive help does not display them. If

you attempt to view a command by entering a question mark at the command line, the command does not appear. However, if you know the command syntax, you can enter it. The system will accept the command and return a message explaining that it will soon be removed. These commands will be completely removed in a future release, which means that you will need to use the appropriate replacement commands.

For more information, see the following document:

http://www.cisco.com/en/US/docs/ios/ios_xe/qos/configuration/guide/legacy_qos_cli_deprecation_xe.html

VRF-Aware NAT

ASRNAT will not handle fragmented packets unless VFR is configured on all NAT interfaces. VFR will automatically be configured when NAT is configured, but users must "not" manually unconfigure VFR on NAT interfaces as NAT cannot process the fragmented packets and out-of-order fragments correctly.

Important Notes About Cisco IOS XE Release 2.5.0

This section describes important notes about Cisco IOS XE Release 2.5.0 and later releases.

Embedded Packet Capture

The Embedded Packet Capture (EPC) feature is not functional and not supported for the Cisco ASR 1000 Series Routers.

QoS: Policing Support for GRE Tunnels

When queuing feature on the GRE tunnel interface is not supported with crypto configured on the physical interface.

QoS: Support for GRE/sVTI Tunnel

With IOS XE 2.5.0, the Cisco ASR 1000 Router Series supports Quality-of Service (QoS) applied to

A GRE or sVTI tunnel with policing and marking only for INGRESS traffic

A GRE or sVTI tunnel with 2-level hierarchy allowing queuing on the second level for EGRESS traffic

When there are multiple egress physical interfaces for a tunnel, and the tunnel target physical interface changes as a result of tunnel target destination route change, either manually by user configuration or by routing protocol, IOS will not prevent the tunnel traffic from moving to an alternate egress physical interface. However, in IOS XE 2.5.0, QoS tunnel move feature is not supported. When tunnel traffic moved to an alternate egress physical interface, tunnel QoS policy may enter a suspended state. At this point, the tunnel QoS policy will have to be removed and reapplied to the tunnel interface for it to take effect. In addition, queuing features on the GRE tunnel interface are not supported when IPSec is configured on the physical interface.

VRF-Aware NAT

Integrating NAT with MPLS VPNs

This section provides information about integrating NAT with MPLS VPNs.

Prerequisites for Integrating NAT with MPLS VPNs

Before performing the tasks in this module, you should be familiar with the concepts related to configuring NAT for IP address conservation. All access lists required for use with the tasks in this module should be configured prior to beginning the configuration task. For information about how to configure an access list, see IP Access List Sequence Numbering at the following location:

http://www.cisco.com/en/US/docs/ios/12_2s/feature/guide/fsaclseq.html


Note If you specify an access list to use with a NAT command, NAT does not support the commonly used permit ip any command in the access list.


Restrictions for Integrating NAT with MPLS VPNs

The following functionality is not supported for VRF-Aware NAT:

VPN to VPN translations. In other words, VRF cannot be applied on the NAT outside interface.

Translation of multicast packets

Translations with inside destinations

Reversible route maps

MIBs

MPLS traffic engineering

Configuring inside dynamic translations defined with outside interface mappings is not supported.

Configuring inside static translations with interface mappings is not supported. The following commands, which do not include VRF, are not supported:

ip nat inside source static esp local-ip interface type number

ip nat inside source static local-ip global-ip route-map name

ip nat inside source static local-ip interface type number

ip nat inside source static tcp local-ip local-port interface type number global-port

ip nat inside source static udp local-ip local-port interface type number global-port

Dependency of NAT on VFR

ASRNAT will not handle fragmented packets unless VFR is configured on all NAT interfaces. VFR will automatically be configured when NAT is configured, but users must "not" manually unconfigure VFR on NAT interfaces as NAT cannot process the fragmented packets and out-of-order fragments correctly.

Important Notes About Cisco IOS XE Release 2.3.0

This section describes important notes about Cisco IOS XE Release 2.3.0 and later releases.

Any Transport Over MPLS (AToM) Support

The configuration of Any Transport Over MPLS (AToM) on the Cisco ASR 1000 Series Routers in Cisco IOS XE Release 2.3.0 is only supported on a subinterface; AToM cannot be configured on the main interface. In addition, you cannot have any IP configuration on the main interface when you have an AToM configuration on the subinterface. These configuration guidelines are applicable to VC mode, VP mode, and L2VPN PW redundancy.

MPLS TE Support

Cisco ASR 1000 Series Router users considering the implementation of MPLS TE are recommended to consult with their local Cisco technical support representative for Cisco IOS XE implementation details.

VRF-Aware NAT

Dependency of NAT on VFR

ASRNAT will not handle fragmented packets unless VFR is configured on all NAT interfaces. VFR will automatically be configured when NAT is configured, but users must "not" manually unconfigure VFR on NAT interfaces as NAT cannot process the fragmented packets and out-of-order fragments correctly.

Important Notes About Cisco IOS XE Release 2.2.2

This section describes important notes about Cisco IOS XE Release 2.2.2 and later releases.

SSO for L2TP Tunnel Switching Not Supported

If dual route processors (RPs) are used on the Cisco ASR 1000 Series Router in Cisco IOS XE Release 2.2.2 and L2TP Tunnel Switching is configured, then no l2tp sso enable must be configured.

VRF-Aware NAT

Dependency of NAT on VFR

ASRNAT will not handle fragmented packets unless VFR is configured on all NAT interfaces and environments in Cisco IOS XE Release 2.2.2. VFR will automatically be configured when NAT is configured, but users must "not" manually unconfigure VFR on NAT interfaces as NAT cannot process the fragmented packets and out-of-order fragments correctly.

Important Notes About Cisco IOS XE Release 2.2.1

This section describes important notes about Cisco IOS XE Release 2.2.1 and later releases.

100M FX SFP Not Supported on Cisco 2-Port Gigabit Ethernet Shared Port Adapter

The 100M FX SFP is not supported on the Cisco 2-Port Gigabit Ethernet Shared Port Adapter (2x1GE SPA) on the Cisco ASR 1000 Series Routers in Cisco IOS XE Release 2.2.1.

Intelligent Service Gateway (ISG) Features Not Supported

The following Intelligent Service Gateway (ISG) features are not supported on the Cisco ASR 1000 Series Routers in Cisco IOS XE Release 2.2.1:

ISG IP subscriber functionality on the following types of access interfaces: Gigabit EtherChannel (GEC) (Port Channel), generic routing encapsulation (GRE), PPP (virtual-template), and Layer 2 Tunneling Protocol (L2TP)

ISG prepaid billing

ISG IP interface sessions

Interface statistics for ISG multiservice interfaces

Access lists cannot be configured as match criteria in ISG Layer 4 redirect configuration. As an alternative, Layer 4 redirect should be configured in ISG traffic class services.

Stateful Switchover (SSO and in-service software upgrade (ISSU) for ISG IP subscriber sessions or traffic class sessions. Upon switchover, an IP session must be recreated or restarted (for Dynamic Host Configuration Protocol (DHCP) sessions) when the session becomes active again.

SSO and ISSU for any features on IP subscriber sessions or traffic class sessions

SSO and ISSU for the following features on ISG PPP sessions:

Port-Bundle Host Key

Layer 4 Redirect

Traffic Class

Per-Session Multicast Support

Enhancements to the IP multicast feature provide support for per-session multicast in broadband environments in Cisco IOS XE Release 2.2.1.

VRF-Aware NAT

Dependency of NAT on VFR

ASRNAT will not handle fragmented packets unless VFR is configured on all NAT interfaces and environments in Cisco IOS XE Release 2.2.1. VFR will automatically be configured when NAT is configured, but users must "not" manually unconfigure VFR on NAT interfaces as NAT cannot process the fragmented packets and out-of-order fragments correctly.

Important Notes About Cisco IOS XE Release 2.1.1

This section describes important notes about Cisco IOS XE Release 2.1.1 and later releases.

Startup Configuration File Backup

As a matter of routine maintenance on any Cisco router, users should backup the startup configuration file by copying the startup configuration file from NVRAM onto one of the router's other file systems and, additionally, onto a network server. Backing up the startup configuration file provides an easy method of recovering the startup configuration file in the event the startup configuration file in NVRAM becomes unusable for any reason.

For users using any Cisco ASR 1000 Series Router with a single RP, including any Cisco ASR 1002 or Cisco ASR 1004 Router, backing up the startup configuration file onto another router file system is especially important due to CSCsq70140, which is documented in the Caveats section of these release notes. The workaround for users who run into this caveat is to replace the startup configuration file in NVRAM with a backup copy of the startup configuration file on the router; therefore, customers who have backed up their startup configuration files onto the router will be ready to resolve these caveats if they occur on their Cisco ASR 1000 Series Routers using a single RP.

Example 1: Copying Startup Configuration File to Bootflash

Router# dir bootflash:
Directory of bootflash:/
 
   
   11  drwx       16384   Dec 4 2007 04:32:46 -08:00  lost+found
86401  drwx        4096   Dec 4 2007 06:06:24 -08:00  .ssh
14401  drwx        4096   Dec 4 2007 06:06:36 -08:00  .rollback_timer
28801  drwx        4096  May 29 2008 16:31:41 -07:00  .prst_sync
43201  drwx        4096   Dec 4 2007 04:34:45 -08:00  .installer
   12  -rw-   208904396  May 28 2008 16:17:34 -07:00  
asr1000rp1-adventerprisek9.02.01.00.122-33.XNA.bin
 
   
Router# copy nvram:startup-config bootflash:
Destination filename [startup-config]? 
 
   
3517 bytes copied in 0.647 secs (5436 bytes/sec)
 
   
Router# dir bootflash:
Directory of bootflash:/
 
   
   11  drwx       16384   Dec 4 2007 04:32:46 -08:00  lost+found
86401  drwx        4096   Dec 4 2007 06:06:24 -08:00  .ssh
14401  drwx        4096   Dec 4 2007 06:06:36 -08:00  .rollback_timer
28801  drwx        4096  May 29 2008 16:31:41 -07:00  .prst_sync
43201  drwx        4096   Dec 4 2007 04:34:45 -08:00  .installer
   12  -rw-   208904396  May 28 2008 16:17:34 -07:00  
asr1000rp1-adventerprisek9.02.01.00.122-33.XNA.bin
13 -rw-        7516   Jul 2 2008 15:01:39 -07:00  startup-config

Example 2: Copying Startup Configuration File to USB Flash Disk

Router# dir usb0:
Directory of usb0:/
 
   
43261  -rwx   208904396  May 27 2008 14:10:20 -07:00  
asr1000rp1-adventerprisek9.02.01.00.122-33.XNA.bin
 
   
255497216 bytes total (40190464 bytes free)
 
   
Router# copy nvram:startup-config usb0:
Destination filename [startup-config]? 
 
   
3172 bytes copied in 0.214 secs (14822 bytes/sec)
 
   
Router# dir usb0:
Directory of usb0:/
 
   
43261  -rwx   208904396  May 27 2008 14:10:20 -07:00  
asr1000rp1-adventerprisek9.02.01.00.122-33.XNA.bin
43262 -rwx        3172   Jul 2 2008 15:40:45 -07:00  startup-config
 
   
255497216 bytes total (40186880 bytes free)

Example 3: Copying Startup Configuration File to a TFTP Server

Router# copy bootflash:startup-config tftp:
Address or name of remote host []? 172.17.16.81
Destination filename [pe24_asr-1002-confg]? /auto/tftp-users/user/startup-config
!!
3517 bytes copied in 0.122 secs (28828 bytes/sec)

VRF-Aware NAT

Dependency of NAT on VFR

ASRNAT will not handle fragmented packets unless VFR is configured on all NAT interfaces. VFR will automatically be configured when NAT is configured, but users must "not" manually unconfigure VFR on NAT interfaces as NAT cannot process the fragmented packets and out-of-order fragments correctly.

Important Notes About Cisco IOS XE Release 2.1.0

This section describes important notes about Cisco IOS XE Release 2.1.0 and later releases.

High-Level Feature Sets Not Supported for the Cisco ASR 1000 Series Routers

Table 1 describes some of the high level feature sets that are not supported for the Cisco ASR 1000 Series Routers in Cisco IOS XE Release 2.1.0 and later releases. Use Cisco Feature Navigator to confirm support for a specific feature. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.


Note Feature support is subject to change from release to release. Some high-level feature sets that were not supported in the initial Cisco IOS XE Release 2.1.0 are now supported. Table 1 has been updated to indicate when support has been introduced in later releases. For the latest feature information, see the New and Changed Information sections of these release notes and Cisco Feature Navigator.


Table 1 High-Level Feature Sets Not Supported for the Cisco ASR 1000 Series Routers 

Major Feature Category
Features Not Supported
ATM

Support for ATM features begins in Cisco IOS XE Release 2.3.0. No ATM features are supported in earlier releases.

Broadband

Support for ANCP begins in Cisco IOS XE Release 2.4.0. ANCP is not supported in earlier releases.

IPv6 Intelligent Service Gateway (IPv6 ISG)

Point-to-Point Protocol over Ethernet Tag (PPPoE Tag)

PPP over Q-in-Q (PPPoQinQ)

Ethernet OAM

Ethernet Operation, Administration, and Maintenance (OAM)

MPLS

Support for Carrier's Carrier begins in Cisco IOS XE Release 2.2.3. Carrier's Carrier is not supported in earlier releases.

Support for Ethernet over MPLS (EoMPLS) begins in Cisco IOS XE Release 2.4.0. Ethernet over MPLS (EoMPLS) is not supported in earlier releases.

Support for Inter-AS begins in Cisco IOS XE Release 2.2.2. Inter-AS is not supported in earlier releases.

IPv6 Provider Edge Router over MPLS (6PE)

IPv6 VPN over MPLS (6VPE)

Label Distribution Protocol (LDP) Session Protection

Support for Layer 2 VPN (L2VPN) begins in Cisco IOS XE Release 2.3.0. L2VPN is not supported in earlier releases.

Support for MPLS Traffic Engineering/Fast Reroute (MPLS TE/FRR) begins in Cisco IOS XE Release 2.3.0. MPLS TE/FRR is not supported in earlier releases.

Virtual Private LAN Service (VPLS)

Multicast

Multicast VPN

Routing

Performance Routing/Optimized Edge Routing (PFR/OER)

Security

Support for Group Encrypted Transport VPN (GET VPN) begins in Cisco IOS XE Release 2.3.0. GET VPN is not supported in earlier releases.

IPv6 IPSec

Support for Lawful Intercept begins in Cisco IOS XE Release 2.4.0. Lawful Intercept is not supported in earlier releases.

VRF-Aware Firewall

Support for VRF-Aware NAT when running ASRNAT this will not handle fragmented packets unless VFR is configured on all NAT interfaces.

Voice

Support for Cisco Unified Border Element (SP Edition) begins in Cisco IOS XE Release 2.4.0. Cisco Unified Border Element (SP Edition) is not supported in earlier releases. Earlier releases include support for Integrated Session Border Controller.