I am teaching a CCNA course using 2500 series routers with Version 12 IOS.I am getting this peculiar problem of not being able to ping Up/Up serial interfaces using their assigned IP addresses.I can ping the loopback IP address.Initially I thought it...

i am trying to network my centrino notebook thro a smc wireless router.there are 4 pcs connected by cat5 to the 4 lan ports of the smc router.initially at the notebook i added the lan,firewire and wireless interfaces to the bridge,assigned a static i...

I am using the Cisco 5 router configuration to teach 1st year classes as in Cisco Networking Academy program.I faced a strange problem whose cause I am unable to fathom.After the routers are set up I can ping from any router to any router.However fro...