On frame, do debug frame packet and make sure you're not getting "no map to destination". Use frame map. On ethernet, means no arp reply, so can't encaps. Do a debug arp | DEBUGGING Key Commands Shows and Debugs Config-register 0x2102 o Bits 15 Diagnostic mode disabled 14 IP Broadcast do not have network numbers 13 Boot default ROM software if net boot fails 12-11 Console Speed 9600-4800-2400-1200 10 IP boradcasts with ones 08 Break disabled 07 OEM disabled 06 Ignore Configuration disabled 03-00 Boot file location To see the config register settings e s 2000002 q To set O r 0x2102 To reload i Additional Commands On 4500 4700 36XX 72XX 75XX Confreg For cables use the show controller command to see if DCE or DTE. Do NOT necessarily trust the labels. Show frame lmi Deleted trouble talking to the frame switch Inactive Other side not working right Active You re good to go. Encapsulation failed On frame do debug frame packet and make sure you re not getting no map to destination . Use frame map. On ethernet means no arp reply so can t encaps. Do a debug arp OSPF timers Use the show ip ospf interface s 0 command to check the timers and make sure they match. Use ip ospf demand-circuit on DDR links If decnet is involved remember that it takes over the MAC address on ethernet. Check for ipx If bgp has to be sync it HAS to redistribute into the IGP Always specify the node in ipx ipx routing Remember the next-hop reacheability requirement in BGP. Use next-hop-self on neighbor statement to alleviate. Spot The Issue .
