Help:Can't ping ISP router from customer router; the opposite works.

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Jul 19th, 2009
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Hi, from customer router "CRA", I can't ping ISP router ( route is not on CRA routing table). Then from service provider routes I can ping CRA just fine.

I did a trace from CRA to NAP (service provider router) and traffic dies on upstream, neighbor router GWA. I have some as-path and filter-list configured to control prefixes on CE and PE2 routers, but I still can't understand why I can't see (servide provider network) on CRA.

Please find attached detailed diagram. Thanks.

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