Comments on: Can’t ping servers in our school division after adding cisco 891 routers http://itknowledgeexchange.techtarget.com/itanswers/cant-ping-servers-in-our-school-division-after-adding-cisco-891-routers/ Wed, 22 May 2013 05:05:11 +0000 hourly 1 By: shawnhendricks http://itknowledgeexchange.techtarget.com/itanswers/cant-ping-servers-in-our-school-division-after-adding-cisco-891-routers/#comment-107802 shawnhendricks Sun, 27 May 2012 14:45:32 +0000 #comment-107802 As Petkoa’s post suggests, 10.x.x.x IP addresses are private and non-routable. You must explicitly state the route and apply it to the appropriate router interfaces in order to make private addresses routable. See http://en.wikipedia.org/wiki/Private_IP_addresses

Have you run a traceroute to see where your ICMP (Internet Control Message Protocol) packets are lost?

]]> By: Featured Member: Snapper70 - ITKE Community Blog http://itknowledgeexchange.techtarget.com/itanswers/cant-ping-servers-in-our-school-division-after-adding-cisco-891-routers/#comment-84021 Featured Member: Snapper70 - ITKE Community Blog Thu, 18 Nov 2010 09:02:09 +0000 #comment-84021 [...] Can’t ping servers in our school division after adding Cisco 891 routers [...]

]]> By: petkoa http://itknowledgeexchange.techtarget.com/itanswers/cant-ping-servers-in-our-school-division-after-adding-cisco-891-routers/#comment-82694 petkoa Fri, 22 Oct 2010 17:02:03 +0000 #comment-82694 Most probably the reason to be unable to ping machines across local private adressed LANs is that private IP chunks are not routable – and cisco router knows this. So, you’d have to explicitly configure routes to these LANs on your routers (static or according to the protocol they use to communicate).

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