On Wed, 28 May 2014 17:32:04 +0800 Zhiping An <anzhip...@gmail.com> wrote:
> In my scenario, nhrp run over gre. > If I set gre tunnel mtu to 64, NHRP request can not be sent. > > Does nhrp support fragment? Short answer: no. Long answer: NHRP runs directly over GRE header (not inside inner ipv4/ipv6), and NHRP does not have built-in fragmentation support. Thus it is not possible to fragment the packets in the inner protocol level. Technically it would be possible to fragment on the outer "NBMA" IPv4 layer. But this would currently require creating the ip_gre tunnel in linux with "ttl inherit" mode, and this has likely unwanted consequences for PMTU detection. MTU of 64 does not really make sense to me, sounds you did this for testing. Are you have some problems with MTU? What is the MTU? - Timo ------------------------------------------------------------------------------ Time is money. Stop wasting it! Get your web API in 5 minutes. www.restlet.com/download http://p.sf.net/sfu/restlet _______________________________________________ opennhrp-devel mailing list opennhrp-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opennhrp-devel
