deric, you really ought to hire a consultant for this sort of thing... just sayin!
On Tue, Oct 25, 2011 at 9:49 PM, Deric Kwok <deric.kwok2...@gmail.com> wrote: > Hi > > Our upstream provider said that destination network is blocking our ip. > > Now my question is how we can know it you can't really, if they do things right. (Aside from just not getting there) > If this network is blocking us, the traceroute should reach out our > bgp router to go further nodes before that network, right presumably, unless the destination is a direct peer. > 2nd question is how they block us to not allow the route to advertise > from our upstream to our bgp router. probably they just don't accept your route... why do you think your route isn't propogated beyond your border(s)? > ls it possible? > > Thank you so much > > > > On Tue, Oct 25, 2011 at 9:35 AM, Patrick Sumby > <patrick.su...@sohonet.co.uk> wrote: >> If your provider has a looking glass then that is a good start to see if >> they have the route in their routing tables. http://www.traceroute.org/ is a >> good start for searching for a looking glass on their website. >> >> Have you checked to see if you're actually recieving the route? You may be >> getting the route but not installing it into your routing table for some >> reason (eg invalid next hop or a router from another provider is being >> prefered). Do you have prefix lists inbound from your provider that could be >> blocking a route? >> >> show ip route X.X.X.X >> and >> show ip bgp route X.X.X.X >> >> will give different information. >> >> If you've covered the above and not found the answer then try talking to >> your provider. >> >> Regards >> Patrick >> >> >> On 25/10/2011 13:26, Deric Kwok wrote: >>> >>> Hi >>> >>> When we try to reach to outside ip, this route doesn't have in our bgp >>> router >>> >>> How can we check whether it doesn't advertise from our upstream to us? >>> >>> Any web site and tools can help? >>> >>> Thank you >>> >> >> >> > >