Question

A retail enterprise uses Cisco Catalyst SD-WAN Cloud OnRamp for SaaS to optimize Webex traffic for 40 branch sites. Each branch has two DIA transport links (biz-internet and public-internet). During peak business hours, users at several branches report jitter and audio dropouts, and the network team confirms that Webex traffic keeps traversing the biz-internet link even after its packet loss rises above acceptable levels. Cloud OnRamp for SaaS is already enabled with application probing on both interfaces. What is the MOST likely cause that prevents automatic rerouting to the better-performing path?

Accepted Answer

The vQoE (Quality of Experience) score computed from the application probes is not being used because the Webex application list is not attached to the Cloud OnRamp for SaaS policy for those interfaces

Answer

The biz-internet interface DSCP marking is set to CS0, which forces all Webex traffic onto that link regardless of loss

Answer

BGP local preference on the biz-internet transport is higher, overriding the OnRamp path selection

Answer

IPsec rekey timers on the public-internet tunnel are shorter, causing the path to be marked down during probing