I think, the ip mtu, ip tcp adjust-mss should solve the issue as Ethernet MTU 1500
With regards KIngs On Wed, May 5, 2010 at 1:00 PM, Michael Davis <[email protected]>wrote: > Hi Everyone: > > HUB > > interface Tunnel0 > > bandwidth 1000 > > ip address 172.16.1.1 255.255.255.0 > > no ip redirects > > ip mtu 1400 > > no ip next-hop-self eigrp 2 > > ip nhrp authentication cisco > > ip nhrp map multicast dynamic > > ip nhrp network-id 2 > > ip tcp adjust-mss 1360 > > no ip split-horizon eigrp 2 > > tunnel source Loopback0 > > tunnel mode gre multipoint > > tunnel key 2 > > tunnel path-mtu-discovery > > SPOKES > > interface Tunnel0 > > bandwidth 1000 > > ip address 172.16.1.5 255.255.255.0 > > no ip redirects > > ip mtu 1400 > > ip nhrp authentication cisco > > ip nhrp map 172.16.1.1 10.1.1.1 > > ip nhrp network-id 2 > > ip nhrp nhs 172.16.1.1 > > ip tcp adjust-mss 1360 > > no ip split-horizon eigrp 2 > > tunnel source Loopback0 > > tunnel mode gre multipoint > > tunnel key 2 > > tunnel path-mtu-discovery > > > > *From:* Brandon Carroll [mailto:[email protected]] > *Sent:* Wednesday, May 05, 2010 5:23 PM > *To:* Michael Davis > *Cc:* Sumit Mahla; [email protected] > *Subject:* Re: [OSL | CCIE_Security] Yusuf Lab 2 > > > > Things that have worked for me: > > > > Try to disable CEF on the tunnel interface > > Make sure you modified the MTU in the tunnel interface > > Change the Bandwidth in the tunnel interface to 1000. I've seen packet > pacing problems with EIGRP on tunnel interfaces. > > > > There are other things that could cause that issue, but maybe you haven't > tried these. > > > > Like Sumit said, paste your configs here and maybe someone can spot an > issue. > > > > > Regards, > > > > Brandon Carroll - CCIE #23837 > > Senior Technical Instructor - IPexpert > > Mailto: [email protected] > > Telephone: +1.810.326.1444 > > Live Assistance, Please visit: www.ipexpert.com/chat > > eFax: +1.810.454.0130 > > > > IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, > Audio Tools, Online Hardware Rental and Classroom Training for the Cisco > CCIE (R&S, Voice, Security & Service Provider) certification(s) with > training locations throughout the United States, Europe, South Asia and > Australia. Be sure to visit our online communities at > www.ipexpert.com/communities and our public website at www.ipexpert.com > > > > > > > > On May 5, 2010, at 12:11 AM, Michael Davis wrote: > > > > Thanks Sumit – I have tried all these things thanks. Any other ideas? > > > > *From:* Sumit Mahla [mailto:[email protected]] > *Sent:* Wednesday, May 05, 2010 5:09 PM > *To:* Michael Davis; [email protected] > *Subject:* RE: [OSL | CCIE_Security] Yusuf Lab 2 > > > > > > Michael, > > Please check the nhs defined in spokes... it should be Tunnel ip not the > NBMA IP... and nhrp mapping.... be carefull in the mapping... it can escape > your eyes very easily > > and also check the network advertised in the routing protocol... only > advertise the tunnel ip network and the loopback network > > > > > > ------------------------------ > > From: [email protected] > To: [email protected] > Date: Wed, 5 May 2010 16:27:54 +1000 > Subject: [OSL | CCIE_Security] Yusuf Lab 2 > > Hi Everyone – I have got the DMVPN going on Yusuf lab 2. The tunnels work, > but both R3 and R5 are losing the DMVPN adjacencies, then they come straight > up again: > > *May 5 06:24:49.271: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 2: Neighbor 172.16.1.1 > (Tunnel0) is down: retry limit exceeded > > *May 5 06:24:52.451: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 2: Neighbor 172.16.1.1 > (Tunnel0) is up: new adjacency > > Does anyone know what would cause this? > > Thanks > > Michael > > > ------------------------------ > > Invest your money wisely post Budget Sign up > now.<http://news.in.msn.com/moneyspecial/> > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > >
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