Symptom : When different types of RTs (2-byte AS, 4-byte AS) is configured on RPL & VRF route target, it will be treated as 'additive' extended communities.
Conditions: RTs (2-byte AS, 4-byte AS)
Ex:
route-policy TEST-IPv4
if destination in (0.0.0...
Behaviour Changed of Dynamic Slow peer.
Slow peer detection and processing is not intended for peers that are permanently slow. Peers that are permanently slow should be moved into their own update group by configuring same route-policy for all the ...
Introduction
ASR9K XR and ASR903 (IOSXE) ISIS behaviour
Problem
ASR9K preferring ISIS L2 for prefix (Lo0) of peer ASR903 (IOS-XE) due to which RAN instance interface is getting preferred
Solution
IOS XR & IOSXE behaviour
IOSXE & IOSXE behaviour...
Introduction
Telemetry configuration & troubleshooting steps
Below is the list of telemetry sensors which can be used for system health monitoring. It includes ASR9K & NCS5500 platform
Configuration
Sample
telemetry model-driven
destinatio...
Introduction
BFD between ASR9K-XR (Bundle-Ether) and ASR903 - XE (Port-channel)
Problem
BFD over Port channel of ASR903 down
Solution
ASR903 Configuration of Port-channel & BFD
bfd-template single-hop AG1-ASR9K
interval microseconds min-tx ...
In scaled BNG profile, this RIB stale entry would come in corner scenerio which will prevent some subscriber to come up, so better is switch/upgrade to latest release of 7.11.21/7.9.21 for ASR9K. This release have some design enhancements which will ...
We can use telemetry for system checks & proactively monitoring. Please refer below link for ASR9K & DNX telemetry sensors
https://community.cisco.com/t5/tkb/workflowpage/tkb-id/4441-docs-service-providers/article-id/5940
For verifying the packets drops or critical alarms , below CLI should help
show controllers fia diagshell 0 "diag counters g" loc <LC>show controllers npu stats traps-all instance all location <LC>
show controllers npu stats traps-all instance all ...
Below some additional triage for Fabric related issue
https://www.cisco.com/c/en/us/support/docs/routers/asr-9000-series-aggregation-services-routers/220131-troubleshoot-punt-fabric-data-path-failu.html
