Then how would you define an all /27 subnets broadcast i.e. not just 192.168.1.224 subnet getting the broadcast but all subnets? Thank you for the reply BTW.
""Vicuna, Mark"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Hi Wesley, > > a) correct > > b) no, as 192.168.1.32/27, 192.168.1.64/27 and > 192.168.1.96/27 are on a different subnet to the broadcast 192.168.1.255 > (this is for the 192.168.1.224/27 subnet). > > c) from the answer to b), no. Only hosts on the 192.168.1.224/27 subnet > will see the broadcast packet of 192.168.1.225. > > > HTH, > Mark. > -----Original Message----- > From: Wesley [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, 17 July 2002 16:49 > To: [EMAIL PROTECTED] > Subject: Broadcasting and the all ones subnet [7:48996] > > > Hello Group, > > Three things to confirm about broadcasts. > > a) the all ones broadcast i.e 255.255.255.255 by default will only be > propagated to the local network and is not forwarded by routers > > b) network and subnet directed broadcasts. If I were to broadcast to > 192.168.1.255, and I have subnets 192.168.1.32/27, 192.168.1.64/27 and > 192.168.1.96/27, would all the subnets receive it as well? > > c) referring to scenario b), I believe that broadcasts with destination > 192.168.1.255 is forwarded. Is this true? > > I was going thru this article about the effect of using the all ones > subnet. > There are somethings that I'm still confused about. The link is > > http://www.cisco.com/warp/public/105/40.html > > 1. In the first example, when host 195.1.1.24 sends a local broadcast to > 195.1.1.255, will hosts attached to router 2's async lines receive the > broadcast? > > 2. OK, its a directed broadcast and router 2 looks up its routing table > and > forwards it out using the default route. Router 1 receives the packet. I > believe the packet is forwarded out to all 192.1.1.x/26 subnets, right? > Will > Router 1 forward the packet back to Router 2? I hope not > > 2a. Another way of looking at it is router 1 thinks that it is a > broadcast > only for subnet 195.1.1.192 and forwards it out only to router 5. Hmmm > .... > I'm definitely confused > > 3. Router 5 receives the packet from router 1. How will it interpret the > packet? I'm guessing that the router sees it as a directed broadcast and > send it out via the default route. Is it normal that routers forward a > packet out from an interface that it received on? As in its received on > e0 > and forwarded out e0 as well > > 4. Once router 1 receives the packet from router 5, will it forward the > packet out to all 192.1.1.x/26 subnets again or just to router 5. The > article did not detail this part and just specified that it will bounce > between routers 1 and 5. It also says that routers 2 thru 4 see the > 'broadcast' only once. The way I see it , if all subnets receive the > broadcast then routers 2 thru 4 should receive the packets as many times > as > router 5. > > I would appreciate all the help I can get. I know you gurus can help me > out. > Thanks!! > > Wes Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=49001&t=48996 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
