Hi, all I am new for the cisco's, and I was try to setup a home lab using cisco
2621, 2FE+1S link to cisco 1602 1E+1S. On the 2621 there is a 1FE connect cable modem to the Internet. But some how cannot connect to the Internet, on debug there error message always say "encapsulation failed". How can I fix it and why?
is routing set up correctly ... is there a default route toward your isp?
BernieM
Cisco 2621 Router: 2 Fast Ethernet 2 WIC module slots (1 with serial card) 1 AIM module slot
Cisco 1602 Router: 1 Ethernet 1 Serial
NAT: This assumes that the 2621 is using FastEthernet 0/0 to the cablemodem and FastEthernet 0/1 to your inside network with Serial 0 going to the 1602 with another Ethernet network behind it. config terminal
interface FastEthernet 0/0 description Connection to Cable Modem ip address dhcp ip nat outside
interface FastEthernet 0/1 description Connection to Inside LAN ip nat inside
interface Serial 0 description Connection 1602 Router Serial 0 ip nat inside
ip access-list standard ip_nat_range permit 10.0.0.0 0.255.255.255 permit 172.16.0.0 255.224.0.0 permit 192.168.0.0 255.255.0.0
ip nat inside source list ip_nat_range interface FastEthernet 0/0 overload
end The IP address ranges in that access-list are just my example which covers all RFC1918 private IP addresses. Make sure your routing is good as mentioned in the previous reply. router rip version 2 network 10.0.0.0 network 172.16.0.0 network 192.168.0.0 passive-interface FastEthernet 0/0 redistribute connected Correct routing will make sure the downstream 1602 can connect. Fool around with the use of "redistribute connected" and the use of both "redistribute static" and making a static default route to the next hop router from your ISP. Example: ip route 0.0.0.0 0.0.0.0 w.x.y.z Salutaitons, Lord Balki
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