fix: logging persistent_url flash vs. bootflash

[aitestino]

Problem

The persistent_url attribute in the logging resource causes test failures on C8000v 17.15.3 due to
version-specific path normalization behavior. When the test configures flash:/local_logging, IOS-XE 17.15.3
normalizes this to the canonical device name bootflash:/local_logging, causing Terraform to detect configuration
drift.

Test failures:

• TestAccDataSourceIosxeLogging on C8000v 17.15.3
• TestAccIosxeLogging on C8000v 17.15.3

Error observed:

persistent_url = "bootflash:/local_logging" -> "flash:/local_logging"
Plan: 0 to add, 1 to change, 0 to destroy.

Root Cause

Cisco changed storage path normalization behavior between IOS-XE versions:

IOS-XE 17.12.4 behavior:

• Accepts bootflash: input
• Normalizes TO flash: (alias form)
• Test configures flash:, device returns flash: → No drift ✓

IOS-XE 17.15.3 behavior:

• Accepts flash: input
• Normalizes TO bootflash: (canonical form)
• Test configures flash:, device returns bootflash: → Drift detected ✗

CLI verification on C9300 17.12.4:

Switch(config)# logging persistent url bootflash:/local_logging
Switch(config)#
*Nov  8 20:32:41.411: %SYS-5-LOG_CONFIG_CHANGE: Persistent logging: enabled, url flash:/local_logging

Switch(config)# do show running-config | inc logging persistent
logging persistent url flash:/local_logging

The device accepted bootflash: but stored/returned flash: in the running config, confirming version-specific
normalization.

Related Issues

Introduced by:

• Commit: eebfc47 (PR enhancement(logging)/Add Additional logging configuration Support in Terraform Provider #334)
• Author: @tech-of-all-trades
• Date: November 4, 2025
• PR Title: "Add logging attributes"

The original PR added persistent logging attributes with flash:/local_logging as the example, which works on
17.12 but causes drift on 17.15.3 due to the version-specific normalization behavior discovered during testing.