according to many books, ip classless should be used to be able to use default route.
but I just found my internet router, actually has no ip classless. which means I am using classful route lookup. And this is working fine,who can explain why???? note that ip address here is not real one. ! hostname xxx ! enable secret xxx ! ip subnet-zero no ip domain-lookup ip name-server x.x.x.x ! interface FastEthernet0/0 ip address 210.210.210.62 255.255.255.240 no ip directed-broadcast ! interface Serial0/0 bandwidth 64 ip unnumbered FastEthernet0/0 no ip directed-broadcast no ip mroute-cache no fair-queue ! no ip classless ip route 0.0.0.0 0.0.0.0 Serial0/0 Gateway of last resort is 0.0.0.0 to network 0.0.0.0 210.210.210.0/28 is subnetted, 1 subnets C 210.210.210.48 is directly connected, FastEthernet0/0 S* 0.0.0.0/0 is directly connected, Serial0/0 xxx# xxx#sh flash System flash directory: File Length Name/status 1 3612344 c2600-i-mz.120-3.T3 [3612408 bytes used, 4776200 available, 8388608 total] 8192K bytes of processor board System flash (Read/Write) Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=53231&t=53231 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]