Cisco Catalyst SD-WAN Policies Configuration Guide, Cisco IOS XE Catalyst SD-WAN Release 17.x - Application-Aware Routing

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/policies/ios-xe-17/policies-book-xe/application-aware-routing.html

Published

2025-12-19

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco documentation; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• The default application-aware routing timers are a 1-second BFD hello interval, a 10-minute (600,000 ms) poll interval and a multiplier of 6, which gives a sliding window of six poll intervals. in context
• Application-aware routing measures loss, latency and jitter on each SD-WAN tunnel using BFD hello packets. in context
• From IOS XE Catalyst SD-WAN 17.15.1a, the default Voice-And-Video SLA class threshold is 2% loss, 300 ms latency and 60 ms jitter. in context
• If no tunnel meets the SLA, application-aware routing can fall back to the best path or send traffic to a backup preferred color. With neither action configured, traffic is forwarded on any available tunnel regardless of SLA. in context
• Most devices allow 6 user-configurable SLA classes plus 1 non-configurable default class. Some larger platforms allow more: 7 on ISR 4400 and 15 on 16 GB ASR 1001/1002 and Catalyst 8500. in context
• An SLA class sets loss from 0 to 100 percent, latency from 1 to 1,000 ms and jitter from 1 to 1,000 ms. in context
• With default timers, application-aware routing judges tunnel quality over a window of up to about an hour (10-minute poll times multiplier 6), so short voice-affecting brownouts may not trigger a path change unless timers are tuned or enhanced AAR is used. inferred in context

Cite this source record

APA

WarmTransfer. (2025, December 19). Cisco Catalyst SD-WAN Policies Configuration Guide, Cisco IOS XE Catalyst SD-WAN Release 17.x - Application-Aware Routing. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-sdwan-pol17-app-aware-routing

BibTeX

@misc{warmtransfer-cisco-sdwan-pol17-app-aware-routing,
  title  = {Cisco Catalyst SD-WAN Policies Configuration Guide, Cisco IOS XE Catalyst SD-WAN Release 17.x - Application-Aware Routing},
  author = {{WarmTransfer}},
  year   = {2025},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-sdwan-pol17-app-aware-routing},
  note   = {Cisco Systems, accessed 2026-09-24}
}