Release Notes for Cisco 8400 Series Secure Routers, Release 17.15.x

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Updated:December 6, 2025

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Updated:December 6, 2025
 

 

Cisco 8400 Series Secure Routers, Release 17.15.x. 3

New hardware features. 3

Resolved issues. 3

Open issues. 3

Related resources. 4

Legal information. 4

 


 

Cisco 8400 Series Secure Routers, Release 17.15.x

Cisco IOS XE 17.15.3a is the first release for the Cisco 8400 Series Secure Routers in the Cisco IOS XE 17.15.x release series.

The Cisco 8400 Series Secure Routers are optimized for campus edge deployments. These routers are powered by a secure networking processor to accelerate encryption and threat protection throughput.

For information on the hardware features supported on the Cisco 8400 Series Secure Routers, refer to the Cisco 8400 Series Secure Routers datasheet.

New hardware features

This section provides a brief description of the new hardware features introduced in this release.

New hardware features for Cisco IOS XE 17.15.3a

Table 1.             New hardware features for Cisco 8400 Series Secure Routers, Release 17.15.3a

Product impact

Description

Cisco 8400 Series Secure Routers

From Cisco IOS XE17.15.3a, Cisco 8400 Series Secure Routers are available in these models:

• C8475-G2

• C8455-G2

 

Resolved issues

This section lists the resolved issues in this specific software release.

Note: This software release may contain resolved bugs first identified in other releases. To see additional information, click the bug ID to access the Cisco Bug Search Tool. To search for a documented Cisco product issue, type in the browser: <bug_number> site:cisco.com

Resolved issues in Cisco IOS XE 17.15.3a

There are no customer impacting bugs that were fixed in this release.

 

Resolved issues in Cisco IOS XE 17.15.5

Bug ID

Description

CSCws71815

Behaviour change for "ip dhcp use class" command on sdwan router

CSCws51814

[IOS XE] Increased CPU Utilization Caused by BGP Scanner Process

CSCws75443

IPv6 neighbour table entries are not timing out causing High TCAM utilisation (no default timers configured)

 

Open issues

This section lists the open issues in this specific software release.

Note: This software release may contain open bugs first identified in other releases. To see additional information, click the bug ID to access the Cisco Bug Search Tool. To search for a documented Cisco product issue, type in the browser: <bug_number> site:cisco.com.

 

Open issues in Cisco IOS XE 17.15.3a

There are no customer impacting bugs that were identified in this release.

 

Open issues in Cisco IOS XE 17.15.5

Bug ID

Headline

CSCwp06956

NGFW Policy Deployment Fails Due to Long Rule Name

CSCwr03611

LWM "memory free low-watermark processor" value its changing itself after upgrade to 17.12

CSCwr83968

Unexpected Reload on cEdge with Static NAT When Polling NAT Translation Data

CSCwq79503

IOS-XE Devices: Router May Reload Unexpectedly During Startup Due To Segmentation Fault

CSCwr19450

Stuck locally originates BGP EVPN type-2 route

CSCws30834

cedge ignore the keepalive command under the SIG tunnel interface pushed by the vmanage

CSCwq29468

[XE BGP] BGP routes are advertised with 0 in AS PATH attribute when replacing ASN

CSCwr51490

DMVPN hub routers could experience an unexpected reload after tunnel down in specific timing scenario.

CSCwn18874

DMVPN spoke crashed at Process = NHRP

CSCwo14975

Memory Leak in DNS Proxy/SKA Triggers Unexpected Reloads

CSCwp67808

ZBFW Invalid Zone drops after upgrade to 17.15

CSCwr37828

BGP neighborship flap during configure replace

CSCwq22471

Device May Unexpectedly Reboot When Importing CA Chains

CSCwq26347

object-group service TCP port range

CSCwk55051

IR1101: polaris_vconfd_cfgpull_t denials during config push trigger

CSCwm01063

Device May Reload During IP SLA Updates With Periodic Hostname Resolution

CSCwr19564

Stuck EVPN BGP type-2 local route and L2RIB route

CSCwo92849

20.15.3/17.12 ip community-list standard CLI template attach failure

CSCwo70548

Ping failure from VRRP backup to VRRP primary virtual address when enabling security policy

CSCwr83214

cEdge is sending lots of fib-updates alarms to vManage filling max alarms in vManage

CSCwp36696

IP aliases stuck in VRF even NAT statements removed

CSCwj24696

IPv6 ND HA Memory Leak from IPv6 NS on Mgmt port

CSCwp40010

RP Crash While Debugging IKEv2

 

Related resources

●     Hardware Installation Guide for Cisco 8400 Series Secure RoutersHardware Installation Guide for Cisco 8400 Series Secure Routers

●     Software Configuration Guide for Cisco 8400 Series Secure RoutersSoftware Configuration Guide for Cisco 8400 Series Secure Routers

●     Smart Licensing Using Policy for Cisco Enterprise Routing Platforms

Legal information

Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)

Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

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