Cisco SD-WAN TLOC Extension: Two Routers Sharing Two Circuits

Two routers at one branch, and only one circuit for each. With Cisco SD-WAN TLOC extension, each router borrows its neighbour's circuit over a short link, so both routers use both transports. We walk the design in SD-WAN Manager, cover routing the extension subnet and NAT for internet circuits, then cut a circuit and fail the preferred router during a voice call. Chapters 00:00 TLOC extension: two routers, one circuit each 01:25 The design: sharing circuits across two routers 02:09 The branch in SD-WAN Manager 03:03 LAN routing: preferring one router 03:37 Routing the extension subnet back 04:11 Internet circuits and NAT 04:43 Cutting the preferred router's circuit 05:23 Losing the preferred router 05:48 Best practice Learn more (Cisco documentation) Cisco Catalyst SD-WAN Design Guide: https://www.cisco.com/c/en/us/td/docs... TLOC extension configuration: https://www.cisco.com/c/en/us/td/docs... Direct internet access design (NAT over TLOC extension): https://www.cisco.com/c/dam/en/us/td/... One router, two circuits:    • Cisco SD-WAN Single-Router Branch: What Ha...   Recorded in the lab in October 2026. Lab software: Cisco Catalyst SD-WAN Manager 26.1.2.1; WAN Edge routers on Cisco IOS XE 26.1.1.