for Cisco 4000 Series ISRs

Improvements

• Application Performance Monitor
  The Application Performance Monitor feature introduces a simplified framework that enables you to configure intent-based performance monitors. With this framework, you can view real-time, end-to-end application performance filtered by client segments, network segments, and server segments.
• Cisco SD-Routing Cloud OnRamp for Multicloud
  Cisco SD-Routing Cloud OnRamp for Multicloud extends enterprise WAN to public clouds. This multicloud solution helps to integrate public cloud infrastructure into the Cisco Catalyst SD-Routing devices. With these capabilities, the devices can access the applications hosted in the cloud.
• Enhancements to BGP Maximum Prefix

1. Discard Extra Prefixes: This enhancement introduces the neighbor maximum prefix discard extra command to drop all excess prefixes received from the neighbor when the configured value of the prefixes exceed the maximum limit.
2. Logging Enhancement: The logging system is enhanced to support a per neighbor logging time every 60 seconds.

• Initiating GARP for NAT Mapping
  This feature introduces support for configuring retry time intervals for GARP messages on the BD-VIF interface. You can configure this feature using the global ip arp nat-garp-retry and ip nat inside source static commands.
• Schedule Software Upgrade on SD-Routing Devices
  With this feature, you can schedule software image upgrade on Cisco SD-Routing devices. This allows you to avoid any downtime due to the software upgrade process.
• SD-Routing Configuration Group
  The Configuration Group feature provides a simple, reusable, and structured method to configure the SD-Routing device using Cisco Catalyst SD-WAN Manager.
• Speed Test for SD-Routing Devices
  Cisco SD-WAN Manager allows you to measure the network speed and available bandwidth between a device and an iPerf3 server. The speed tests measure upload speed from the source device to the selected or specified iPerf3 server, and measure download speed from the iPerf3 server to the source device.
• Strength Enforcement for IKE Security Association (SA)
  This feature introduces an algorithm to ensure that the strength of the IKE (IKEv1 and IKEv2) SA encryption cipher is greater than or equal to the strength of its child IPsec SA encryption cipher. To enable this algorithm, use the crypto ipsec ike sa-strength-enforcement command.
• Support for Flexible NetFlow Application Visibility on SD-Routing Devices
  The Flexible NetFlow (FNF) feature provides statistics on packets flowing through the device and helps to identify the tunnel or service VPNs. Also, it provides visibility for all the traffic that passes through the VPN0 on Cisco SD-Routing devices by using the SD-Routing Application Intelligence Engine (SAIE).
• Support for Packet Capture for SD-Routing
  This feature allows you to configure options to capture the bidirectional IPv6 traffic data to troubleshoot connectivity on the SD-Routing devices.
• Support for Persistence of BGP Dynamic Neighbors
  From IOS XE 17.13.1a, the device maintains the neighbor information even after the session is terminated. To configure this, use the bgp listen persistent command for all dynamic neighbors and bgp listen range peer-group persistent command for specific neighbors.
• Support for Security-Enhanced Linux

1. SELinux (Security-Enhanced Linux) is a solution designed to incorporate a strong, flexible mandatory access control (MAC) architecture into Cisco IOS XE platforms.
2. From Cisco IOS XE 17.13.1a, SELinux is enabled by default in Enforcing mode for Cisco IOS XE platforms.

Cisco Unified Border Element (CUBE) Features

• NAT Traversal using RTP Keepalive
  From Cisco IOS XE 17.13.1a onwards, using RTP keepalive packets, CUBE supports media transmission in the NAT environment.

Bug Fixes

CSCwh10813 - Add verbose log to indicate grant ra-auto un configures grant auto in PKI server.
CSCwf25735 - QoS with more than four remarks with set-cos does not work.
CSCwf44703 - NAT64 prefix is not originated into OMP.
CSCwf80400 - IOS XE router may experience unexpected reset while executing show utd engine standard statistics.
CSCwf14607 - Crash observed exporting PKCS12 to terminal via SSH CLI.
CSCwf71116 - Static route keep advertising via OMP even though there is no route.
CSCwf45486 - OMP to BGP redistribution leads to incorrect AS_Path installation on chosen next-hop.

Open Bugs

CSCwh94906 - WLC segmentation fault crash with Network Mobility Services Protocol (NMSP).
CSCwh84068 - Device crash after changing NAT HSL configuration.
CSCwh77221 - SNMP unable to poll tunnel data after a minute.
CSCwi15930 - Device failing to upgrade due to CDB issue.
CSCwi06843 - Endpoint tracker triggers a CPU hog.
CSCwh76453 - Tracker for TLOC extension is down even though TLOC is up and there is ICMP reachability.
CSCwi14178 - Failed to connect to device : x.x.x.x Port: 830 user: vmanage-admin error: Connection failed.
CSCwi08171 - Router may crash due to crypto IKMP process.
CSCwh01678 - Device FTM crash with SIG enabled.
CSCwi05395 - snmpbulkget cannot get loss, latency and jitter for ProbeClassTable & ClassIntervalTable OIDs.
CSCwf69062 - SDRA-SSLVPN: The SSLVPN session closes with re-authentication error after some interval of time.
CSCwi23562 - When RADIUS is down, and there is an IKE-AUTH request received, the box stops replying to DPD packets.
CSCwi11807 - snmpbulkget breaks the OID appRouteStatisticsTable after minute, not returning the correct order.
CSCwi00369 - Device lost security parameter after upgrade.
CSCwi06404 - Device PKI-related crash after failing a CRL fetch.
CSCwi13563 - IP SLA probe for end-point-tracker does not work once endpoint tracker is changed until reload.
CSCwh65016 - Unexpected reboots on device due to QFP exception.
CSCwh73202 - IOS-XE unexpected reboot due to critical process qfp_ucode_utah fault on fp_0_0 (rc=139).
CSCwi15688 - Unexpected NAT translation occurs in a specific network.
CSCwh91136 - IOS XE: Traffic not encrypted and droped over IPSEC SVTI tunnel.
CSCwh57544 - Silent reload due to LocalSoftADR causes crash without core file.
CSCwi16015 - [SIT]: SSE tunnels do not come up with dialer interface. Relax check in IKE.
CSCwi02383 - Interface configuration is deleted in device with an SM module after a power-cycle.
CSCwi19875 - Device is unable to process hidden characters in a file while trying to use bootstrap method.
CSCwi35177 - Router crash caused by continuous interface flap, interface associated to many IPSec interfaces
CSCwh52440 - IP SLA does not have checks for ICMP probes to be sent on source interface.
CSCwi31833 - UTD deployment failing if deployed from remote server hostname rather than IP.
CSCwi30529 - AAA: Template push fails when AAA authorization is set to local.