It is possible that the internal devices do not have a default gateway or a more specific route to the destination. Verify that they have a route to the destination in their routing table or the default gateway is set. On a Cisco router you can verify that the default gateway is set by issuing the show ip route command. This indicates if the gateway of last resort is set. By issuing the show ip routex.x.x.x command, where x.x.x.x is the destination address, you can verify if a route to the specific destination exists in the routing table.
If the default gateway or a route to the destination does exist, then it is possible that the Internet Service Provider is not advertising the appropriate network to the Internet. You must check with your ISP to verify this.
It is also possible that the reason that internal devices cannot access the Internet is due to an Access Control List (ACL) in the router blocking that device. Make sure you review the ACL's configuration in the router and you allow the devices you want to access the Internet.
What Can You Ping
Default gateway can ping destination
Source can ping ISP network but nothing beyond ISP
What Can You Not Ping
Source cannot ping anything beyond the Internet gateway router
I have a Cisco 3850 I’d like to upgrade to Gibraltar-16.12.05b ( cat3k_caa-universalk9.16.12.05b.SPA.bin ). Below is the version it's currently running. Can I go directly to Gibralter? show ver | inc IOS-XE
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1-In single area, the routers have the Link State Database, having the same LSDB helps the routers to build a loop-free topology.2-Now in a multiarea topology, the ABRs are responsible for advertising an intra area route into another area as an inter-area...
Hello Expert,Our router was flag during an audit for having both ssh v 1.99 and ssh v2.00 running.when I do sh ip ssh the following below :- testf-1#sh ip sshSSH Enabled - version 2.0Authentication methods:publickey,keyboard-interactive,p...
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Hello Guys, ive been strugled with this problem for a while, the image bellow shows a simple diagram for the network.Router GIRASOL = CISCO1921 (this is the router im working on.)Router CANTV = this just simulates the ISPs interntal routing that connects ...