Hi I've been following a thread on NANOG about PMTUD black holing and as a result am reviewing our setup here with regards this.
I've seen in the below link that enabling "no ip unreachables" on a interface can break PMTUD across your network if the outgoing interface is then on a link with an MTU too small as the interface with "no ip unreachables" will not send a packet too big type message. Does anyone have a link to a definitive list as to the effect of turning on this command as I thought that turning on this command didn't prevent the interface sending TTL expired and hence not breaking trace route but now im unsure. Any feedback appreciated. Cheers Kev _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
