Can't ping to IP Loopback on another Routing Protocol

izhangghani · ‎12-29-2023

Hello team,

I have a problem here: CORE_HQ to the ISP uses static default route 0.0.0.0, while CORE_HQ to the downlink uses OSPF. When I try to ping ip lo 8.8.8.8 from CORE_HQ to ISP, it is reachable, but when I try to ping from downlink, say Multilayer Switch 1/2, it is not reachable. Has anyone experienced something similar? Please help me

M02@rt37 · ‎12-29-2023

@izhangghani

Does ISP router has got a route towards MultiLayer Giga 1/1/1 ?

Best regards
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Ruben Cocheno · ‎12-29-2023

@izhangghani

Do a traceroute from the switch sourcing from the relevant interface and see where the traffic is stopping. Reviewing the routing table and try to understand the reason why is stopping, it can be a problem from L1 up to L7. Invest your time on how to become more independent and master your skills. Go for it! Any questions just ping me directly, i'm here to guide you.

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izhangghani · ‎12-29-2023

Hi, all this problem is already solved, i have added configure PAT on CORE_HQ to advertise ip on the endpoint to ISP_ROUTER

M02@rt37 · ‎12-29-2023

ok Thanks for your feedback @izhangghani

Best regards
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