diff --git a/packages/cisco_ios/changelog.yml b/packages/cisco_ios/changelog.yml
index da20d9f899c..a7e4b7dbc57 100644
--- a/packages/cisco_ios/changelog.yml
+++ b/packages/cisco_ios/changelog.yml
@@ -1,4 +1,9 @@
 # newer versions go on top
+- version: "1.28.0"
+  changes:
+    - description: Add support for ISO 8601 timestamps.
+      type: enhancement
+      link: https://github.com/elastic/integrations/pull/11497
 - version: "1.27.2"
   changes:
     - description: Use triple-brace Mustache templating when referencing variables in ingest pipelines.
diff --git a/packages/cisco_ios/data_stream/log/_dev/test/pipeline/test-syslog.log b/packages/cisco_ios/data_stream/log/_dev/test/pipeline/test-syslog.log
index dd9e7b3b6e8..16929865ec9 100644
--- a/packages/cisco_ios/data_stream/log/_dev/test/pipeline/test-syslog.log
+++ b/packages/cisco_ios/data_stream/log/_dev/test/pipeline/test-syslog.log
@@ -13,3 +13,4 @@
 <189>1469087: chswitchm1: Mar 29 07:40:10.863 CDT: %ILPOWER-5-SENSE_POWER_INVALID: Interface Gi1/0/25: invalid power sense 78054 milliwatts current 515 mA voltage 151562 mV
 <189>1469087: ch_switch_m-1: Mar 29 07:40:10.863 CDT: %ILPOWER-5-SENSE_POWER_INVALID: Interface Gi1/0/25: invalid power sense 78054 milliwatts current 515 mA voltage 151562 mV
 <189>Jun 12 18:10:50 10.53.35.85 %ILPOWER-5-IEEE_DISCONNECT: Interface Gi1/0/20: PD removed
+<189>2024-10-11T10:15:31.208321-05:00 TestDevice %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to up
diff --git a/packages/cisco_ios/data_stream/log/_dev/test/pipeline/test-syslog.log-expected.json b/packages/cisco_ios/data_stream/log/_dev/test/pipeline/test-syslog.log-expected.json
index 09533925162..935288d60a4 100644
--- a/packages/cisco_ios/data_stream/log/_dev/test/pipeline/test-syslog.log-expected.json
+++ b/packages/cisco_ios/data_stream/log/_dev/test/pipeline/test-syslog.log-expected.json
@@ -673,6 +673,45 @@
             "tags": [
                 "preserve_original_event"
             ]
+        },
+        {
+            "@timestamp": "2024-10-11T10:15:31.208-05:00",
+            "cisco": {
+                "ios": {
+                    "facility": "LINEPROTO"
+                }
+            },
+            "ecs": {
+                "version": "8.11.0"
+            },
+            "event": {
+                "category": [
+                    "network"
+                ],
+                "code": "UPDOWN",
+                "original": "<189>2024-10-11T10:15:31.208321-05:00 TestDevice %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to up",
+                "provider": "firewall",
+                "severity": 5,
+                "type": [
+                    "info"
+                ]
+            },
+            "log": {
+                "level": "notification",
+                "syslog": {
+                    "hostname": "TestDevice",
+                    "priority": 189
+                }
+            },
+            "message": "Line protocol on Interface TenGigabitEthernet1/0/1, changed state to up",
+            "observer": {
+                "product": "IOS",
+                "type": "firewall",
+                "vendor": "Cisco"
+            },
+            "tags": [
+                "preserve_original_event"
+            ]
         }
     ]
 }
\ No newline at end of file
diff --git a/packages/cisco_ios/data_stream/log/elasticsearch/ingest_pipeline/default.yml b/packages/cisco_ios/data_stream/log/elasticsearch/ingest_pipeline/default.yml
index 563b4d84dd8..dc76ff0f028 100644
--- a/packages/cisco_ios/data_stream/log/elasticsearch/ingest_pipeline/default.yml
+++ b/packages/cisco_ios/data_stream/log/elasticsearch/ingest_pipeline/default.yml
@@ -35,6 +35,7 @@ processors:
       field: event.original
       tag: grok_header
       patterns:
+        - '^%{CISCO_PRIORITY_MSGCOUNT}?%{TIMESTAMP_ISO8601:_temp_.cisco_timestamp} %{NOTSPACE:log.syslog.hostname} %{GREEDYDATA:_temp_.message}$'
         - '^%{CISCO_PRIORITY_MSGCOUNT}?%{SYSLOGTIMESTAMP} %{IP} %{CISCO_HOSTNAME:log.syslog.hostname}: (?:%{NUMBER:cisco.ios.sequence}: )?(?:%{CISCO_UPTIME:cisco.ios.uptime}|%{CISCO_TIMESTAMP}): %{GREEDYDATA:_temp_.message}$'
         - '^%{CISCO_PRIORITY_MSGCOUNT}?%{SYSLOGTIMESTAMP} (?:%{IP}|%{CISCO_HOSTNAME:log.syslog.hostname}) %{NUMBER:cisco.ios.sequence}: (?:%{CISCO_UPTIME:cisco.ios.uptime}|%{CISCO_TIMESTAMP}): %{GREEDYDATA:_temp_.message}$'
         - '^%{CISCO_PRIORITY_MSGCOUNT}?(?:(?:%{CISCO_HOSTNAME:log.syslog.hostname}|%{IP})[:]? )?(?:%{NUMBER:cisco.ios.sequence}: )?(?:%{CISCO_UPTIME:cisco.ios.uptime}|%{CISCO_TIMESTAMP}): %{GREEDYDATA:_temp_.message}$'
@@ -42,6 +43,8 @@ processors:
         - '^%{SYSLOGTIMESTAMP} (?:%{IP}|%{HOSTNAME:log.syslog.hostname}) %{CISCO_PRIORITY_MSGCOUNT}?(?:%{NUMBER:cisco.ios.sequence}: )(\\*)?(?:%{CISCO_UPTIME:cisco.ios.uptime}|%{CISCO_TIMESTAMP}): %{GREEDYDATA:_temp_.message}$'
         - '^%{SYSLOGTIMESTAMP} (?:%{IP}|%{HOSTNAME:log.syslog.hostname}) %{CISCO_PRIORITY_MSGCOUNT}?(?:%{NUMBER:cisco.ios.sequence}: )%{GREEDYDATA:_temp_.message}$'
       pattern_definitions:
+        ISO8601_TIMEZONE: "(?:Z|[+-]%{HOUR}(?::?%{MINUTE}))"
+        TIMESTAMP_ISO8601: "%{YEAR}-%{MONTHNUM}-%{MONTHDAY}[T ]%{HOUR}:?%{MINUTE}(?::?%{SECOND})?%{ISO8601_TIMEZONE:_temp_.tz}?"
         CISCO_PRIORITY_MSGCOUNT: '<%{NONNEGINT:log.syslog.priority:long}>(?:%{NONNEGINT:cisco.ios.message_count})?(?:: )?'
         CISCO_TIMESTAMP: '[*]?%{CISCOTIMESTAMP_EX:_temp_.cisco_timestamp}(?: %{CISCO_TZ:_temp_.tz})?'
         CISCOTIMESTAMP_EX: '(%{CISCOTIMESTAMP})|(%{YEAR} %{MONTH} %{MONTHDAY} %{TIME})'
@@ -128,6 +131,7 @@ processors:
       field: _temp_.cisco_timestamp
       tag: date_cisco_timestamp
       formats:
+        - "ISO8601"
         - "MMM d yyyy HH:mm:ss.SSS z"
         - "MMM d yyyy HH:mm:ss.SSS"
         - "MMM d yyyy HH:mm:ss z"
diff --git a/packages/cisco_ios/manifest.yml b/packages/cisco_ios/manifest.yml
index 6c766362f26..5a4bd94eb8e 100644
--- a/packages/cisco_ios/manifest.yml
+++ b/packages/cisco_ios/manifest.yml
@@ -1,7 +1,7 @@
 format_version: "3.0.3"
 name: cisco_ios
 title: Cisco IOS
-version: "1.27.2"
+version: "1.28.0"
 description: Collect logs from Cisco IOS with Elastic Agent.
 type: integration
 categories: