A host on the 172.16.x.x/16 network would have to have a specific route for 172.16.2.x/24, or the packet would not be directed to a router, and (Ignoring proxy arp) the communication would fail.
If proxy arp was enabled on the local router, and the router was configured with a mask smaller than /16, it would work. ejh -----Original Message----- From: Steven A. Ridder [mailto:[EMAIL PROTECTED]] Sent: Friday, December 14, 2001 2:07 PM To: [EMAIL PROTECTED] Subject: Re: Mask in L3 Packet [7:29182] Say I have 2 networks: Network 1. 172.16.x.x/16 and Network 2. 172.16.2.x/24 We all agree that they are two different networks, right? Now if Host A on Network 1 is 172.16.2.1/16 and Host B is on Network 2 is 172.16.2.1/24, How does the host know that the second host is on a different network? Are they differnt addresses because of the mask, or are they considered the same address regardless of mask, and therefore illegal? I understand ANDing on the local host. It's just if 2 hosts had the same numbers, only marked differently by the mask, are they the same or not? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=29233&t=29182 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]