<div class="gmail_quote">On 26 June 2012 20:15, Kelly <<a href="mailto:kcobean@gmail.com" target="_blank">kcobean@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Peter Ruprecht <ruprech@...> writes: > > Hi everyone, ... <div class="im">> > Does anyone know if there's a way to get RHEL 6 to give me the behavior > I'm used to with RHEL 5? That is, how can I ping the interface on the > "other" subnet and actually get a reply? > > Thanks, > Peter Ruprecht > </div>You'll need to set the rp_filter value to 0. Right now, your RHEL6 host is configured to do strict source route checking, so if an interface receives a packet for which the reply interface is a different interface, the packet will be dropped. Setting rp_filter to 0 allows the system to reply out a different interface than the packet was received on. It's a sysctl parameter. </blockquote><div> You're probably better of setting it to 2 (loose, rather than strict). However, asymmetric routing is not necessarily a good idea so you would be wise to investigate getting packets rto route out of the interface you'd expect replies on. jch </div></div>