About Cisco ASR 1000 Series Aggregation Services Routers
The Cisco ASR 1000 Series Routers carry a modular yet integrated design, so network operators can increase their network capacity and services without a hardware upgrade. The routers are engineered for reliability and performance, with industry-leading advancements in silicon and security to help your business succeed in a digital world that's always on. The Cisco ASR 1000 Series is supported by the Cisco IOS XE Software, a modular operating system with modular packaging, feature velocity, and powerful resiliency. The series is well suited for enterprises experiencing explosive network traffic and network service providers needing to deliver high-performance services.
 Note |
For more information on the features and specifications of Cisco ASR 1000 Series Routers, refer to the Cisco ASR 1000 Series Routers datasheet. For information on the End-of-Life and End-of-Sale Announcements for Cisco ASR 1000 Series routers, refer to the ASR 1000 Series End-of-Life and End-of-Sale Notices. |
Note |
Cisco IOS XE 17.18.1a is the first release for Cisco ASR 1000 Series Aggregation Services Routers in the Cisco IOS XE 17.18.x release series. |
Product Field Notice
Cisco publishes Field Notices to notify customers and partners about significant issues in Cisco products that typically require an upgrade, workaround or other user action. For more information, see https://www.cisco.com/c/en/us/support/web/field-notice-overview.html.
We recommend that you review the field notices to determine whether your software or hardware platforms are affected. You can access the field notices from https://www.cisco.com/c/en/us/support/web/tsd-products-field-notice-summary.html#%7Etab-product-categories.
New and Changed Hardware Features
There are no new hardware features for this release.
New and Changed Software Features in Cisco IOS XE 17.18.1a
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Product Impact |
Feature |
Description |
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Ease of Use |
From Cisco IOS XE 17.18.1a release, Cisco Catalyst SD-WAN Manager supports deployment of IOx applications such as Cyber Vision, Thousand Eyes, UTD, and so on. The support to monitor these applications is introduced through Hosted Edge Services monitoring dashboard which offers a simplified user experience for overseeing IOx container applications across multiple devices. The Hosted Edge Services monitoring dashboard is introduced on Cisco Catalyst SD-WAN Manager version 20.18.x. |
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Ease of Use |
This feature introduces a new certificate authorization setting, Enterprise Certificate Settings, which unifies certificate configurations for SD-Routing devices. Cisco SD-WAN Manager automates certificate management by leveraging protocols like EST (Enrolment over Secure Transport) and SCEP (Simple Certificate Enrolment Protocol). The feature automates the enrolment, and renewal of certificates. |
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Upgrade |
This feature enables the transport of IPv4 MVPN traffic across an SRv6 network. It simplifies multicast deployment by using the existing SRv6 unicast infrastructure as the underlay. With this feature, the ingress PE router receives multicast traffic and creates a separate unicast SRv6-encapsulated copy for each egress PE router in the multicast group. |
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Upgrade |
This feature introduces a mechanism to determine the maximum transmission unit (MTU) for packets traversing an SRv6 underlay network. It ensures efficient packet forwarding by preventing fragmentation and packet drops, thereby allowing network devices to dynamically adjust packet sizes to avoid exceeding link MTU limits. The system relays ICMP Packet Too Big (PTB) messages from the SRv6 underlay to the IPv6/IPv4 overlay network, supporting both Transit-node and Headend-node PTB relay methods. |
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Upgrade |
From Cisco IOS XE 17.18.1a, Flexible Algorithm enhances SRv6 by including functions like Topology Independent Loop-Free Alternate (TI-LFA) and microloop (uLoop) avoidance. This feature improves network resilience and efficiency. |
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Ease of setup |
Cisco IOS XE 17.18.1a introduces the Cisco Secure Routers Swim and Onboarding tool that helps customers upgrade and onboard autonomous hardware devices to cloud-hosted or on-premises Catalyst Cisco SD-WAN Manager. |
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Ease of setup |
Security Cloud Control is a cloud-based multi-device manager that facilitates management of security policies to achieve consistent policy implementation. Security Cloud Control helps optimize your security policies by identifying inconsistencies with them and by giving you tools to fix the inconsistencies. From Cisco IOS XE 17.18.1a release, you can integrate Cisco SD-WAN Manager with Security Cloud Control, which allows you to import existing NGFW policies, security objects, and security profiles into Security Cloud Control. With this integration, you can share objects and policies as well as make configuration templates to promote policy consistency across devices. |
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CUBE Features |
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Ease of Use |
From Cisco IOS XE 17.18.1a onwards, serviceability is enhanced to display consolidated information on forked and associated anchor call legs. |
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Upgrade |
Third-Party GUID capture for correlation between call transfers and SIP-based recording |
From Cisco IOS XE 17.18.1a onwards, the Third-Party GUID capture for correlation between calls and SIP-based recording is extended to support transmission of globally unique identifiers (GUIDs) to the recording server during call transfers. |
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Upgrade |
IOS UC apps reports smart licensing flex subscription entitlement tag |
From Cisco IOS XE 17.18.1a onwards, CUBE and SRST smart licensing reports flex subscription entitlement tag on all the supported platforms. |
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Resolved and Open Bugs for Cisco IOS XE 17.18.x
Resolved Bugs for Cisco IOS XE 17.18.1a
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Bug ID |
Description |
|---|---|
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VFR is not dynamically disabled after ZBFW removal. |
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Speed test download / Throughput issue on router seen with IPSEC ESP-NULL transform using Zscaler. |
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SGW offline with SSH error Unable to open socket while establishing NETCONF session. |
Open Bugs for Cisco IOS XE 17.18.1a
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Bug ID |
Description |
|---|---|
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17.12 - keyman core files on router. |
ROMmon Release Requirements
For more information on ROMmon support for Route Processors (RPs), Embedded Services Processors (ESPs), Modular Interface Processors (MIPs), and Shared Port Adapter Interface Processors (SIPs) on Cisco ASR 1000 Series Aggregation Services Routers, see https://www.cisco.com/c/en/us/td/docs/routers/asr1000/rommon/asr1000-rommon-upg-guide.html.
Note |
After upgrading the ROMmon to version 17.3(1r), you cannot revert it to a version earlier than 17.3(1r) for the following platforms:
This restriction is only applicable for these platforms. If you have upgraded to ROMmon version 17.3(1r) on any other platform, reverting to an earlier version of ROMmon is permitted and does not cause any technical issues. |
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