Cisco IOS XE 17.17 Update Version Cisco IOS XE 17.17.1

Cisco Catalyst 9500 Series Switches, Cisco IOS XE 17.17.x adds Interface-Level VLAN-SGT Mapping and split ARP/ForUS queues in 17.17.1. It also includes open caveat CSCvu14870 and new install-mode upgrade guidance for 17.17.1.

• Interface-Level VLAN-SGT Mapping lets administrators assign SGTs to VLANs per interface for voice and data VLAN mapping, improving access-control flexibility.
• Hidden commands access was tightened starting with Cisco IOS XE Fuji 16.8.1a as an improved security measure; service internal is required for some privileged EXEC hidden commands.
• Cisco TrustSec restrictions remain: TrustSec can be configured only on physical interfaces, not logical interfaces.

• Interface-Level VLAN-SGT Mapping for per-interface SGT assignment on VLANs.
• Split ARP and ForUS packets into two separate queues with separate policers.
• Support for show firmware version all on Cisco Catalyst 9500 Series Switches - High Performance.

• CSCvu14870: Cat9k archive command can cause bulk sync failure and reload the standby switch.
• No resolved caveats are listed for Cisco IOS XE 17.17.1.

• For Cisco Catalyst 9500 Series Switches, install-mode upgrades to 17.17.x can use install add file ... activate commit; request platform software commands are deprecated.
• For Cisco Catalyst 9500 Series Switches - High Performance, only install commands are supported for upgrade and downgrade.
• ROMMON may upgrade automatically in the primary SPI flash during first upgrade to a newer release; the golden SPI flash ROMMON must be upgraded manually with upgrade rom-monitor capsule golden switch.
• Downgrading does not downgrade ROMMON; the updated ROMMON remains installed.
• Cisco recommends at least 1 GB free flash space before installing a new image.
• ISSU is supported only within defined release-train limits; it is not supported between major trains, for engineering special releases, or between LDPE and NPE images.
• The command service-routing mdns-sd is deprecated; use mdns-sd gateway instead.
• Starting with Cisco IOS XE 17.10, diffie-hellman-group14-sha1, hmac-sha1, hmac-sha2-256, and hmac-sha2-512 are removed from the default SSH algorithm list.

• Transceiver compatibility tables
  https://www.cisco.com/en/US/products/hw/modules/ps5455/products_device_support_tables_list.html
• Catalyst 9500 datasheet
  https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9500-series-switches/datasheet-c78-738978.html

Product Information

Vendor: Cisco

Product: IOS XE

Product type: Other

Platform: Network Device

Variant: 17.17

Version: Cisco IOS XE 17.17.1

Vendor release date: Mar 31, 2025

Original release notes: View on vendor site

Published on updatealert.io: Jun 5, 2026

Description: Network operating system software for Cisco enterprise routers and switches.