topic Re: troubleshoot DC router in Prisma SD-WAN Discussions

troubleshoot DC router

M_Pandya — Thu, 05 Jun 2025 13:12:19 GMT

We have deployed Data Center (DC) routers at two distinct U.S. locations, each configured with multiple VRFs to support various service segments. The issue encountered is that despite no spoke sites being operational yet, the DC routers are already receiving route prefixes on one of the VRF and advertising them toward the LAN segment at DC.

Can you suggest possible approaches for troubleshooting this issue?

Re: troubleshoot DC router

rgallagher — Thu, 05 Jun 2025 13:17:13 GMT

For your branches even if they are not fully operational, are they partially configured, for example in Control mode with some Global Prefixes configured at the Site level?

Re: troubleshoot DC router

M_Pandya — Thu, 05 Jun 2025 13:22:18 GMT

Thank you for quick respond. Yes, It is. because other VRF services are in production and exchanging routes. but new VRF services are just deployed at DC routers. one thing I don't understand is why few prefixes I can see in advertise routers toward LAN at DC?

Re: troubleshoot DC router

rgallagher — Thu, 05 Jun 2025 14:06:50 GMT

If you use site prefixes at the Branch it doesn't matter if the subnets are in operation or not, they will still be advertised in the DC. Personally i don't recommend using site prefixes at Branch level (only at DC) rather use Globally Scoped interfaces or routing instances. You have more control this way over what is advertised into the DC core.