Lets say your network is 170.10.0.0/16. You have a router with a default route pointing at your ISP. Someone finger checks their telnet and tries to connect to 170.10.200.1 and this subnet doesn't exist within your network. With no ip classless the router drops packet. With ip classless the packet will follow default until it gets to your provider who promptly sends it back to you until the TTL expires.
You can also do this with ip classless inter e0 ip add 192.168.1.1 255.255.0.0 classful would not recognize the /16 mask as being valid for 192.168. Dave Matt Saunders wrote: > > Hi Group, > > Im really struggling to understand the requirement in using the ip classless > command when you are configuring a default route. > > I noticed that RIP 2 is a classless protocol & RIP ver 1 is a classfull. > > Can anyone help me understand what the difference is (in simple terms!!) as > i want to move on with my studies though im sure this is something thats > going to come up again!!!! > > Cheers > > Matt -- David Madland Sr. Network Engineer CCIE# 2016 Qwest Communications Int. Inc. [EMAIL PROTECTED] 612-664-3367 "Emotion should reflect reason not guide it" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38861&t=38861 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
