Thanks for the ideas. I tried disabling vlan offloading and didnt have much luck. Do I need to restart networking or anything? How do i create a generic NIO vs the Linux one?
On Fri, Oct 19, 2012 at 2:30 PM, Bob McCouch <[email protected]> wrote: > sudo ethtool -K eth0 rxvlan off ; sudo ethtool -K eth0 txvlan off > > Substitute your NIC in if it's not eth0. > > Ubuntu 12.04 started using NIC VLAN tag offloading whereas 10.X and 11.X > did not. I had the exact same issue -- frames from virtual routers were > making it out to the switch, but not back in. > > Regards, > Bob > > > PS -- Theoretically speaking, if anyone ever used IOU, they might discover > that iou2net.pl needs the opposite. They might find it seems to work > *only* with VLAN tag offloading enabled in Ubutnu 12.04. > > > > On Fri, Oct 19, 2012 at 2:19 PM, Ryan Jensen <[email protected]> wrote: > >> Hey All, >> I followed the guide on IPE's site here: >> >> http://blog.ipexpert.com/2011/02/28/gns3-and-physical-switches-breakout-switch/#more-6136 >> >> I have a 24-port 3750 as my Breakout switch and my Lab Cat1-4 are also >> 3750 >> switches. I had a fine-working setup for a while, but I had a situation >> where I had to upgrade my server hardware (ahh shucks right?). Previous >> server was a Dell 2850 running Ubuntu 10.x LTS, 4gb RAM, dual dual-core >> CPU, dual NICs. New setup is a Dell 2950 running Ubuntu 12.04.1 LTS, 32gb >> RAM, dual quad-core CPU, 8 NICs (two on-board, 2 on a PCIX card, and 4 >> more >> on a PCIX card). With the old server, this worked flawlessly. >> The problem I'm hitting is that my Physical switches aren't able to >> communicate with my Virtual routers. My switches see CDP from the virtual >> routers, but the reverse is not true. I can ping Physical <-> Physical and >> Virtual <-> Virtual, but not Physical <-> Virtual. My physical switches >> are >> getting ARP from the virtual routers, but that's about it. I.E. My Cat4 >> has >> an ARP resolution for R9's Fa0/1 interface, but R9 does not have a >> resolution for CAT4s vlan2300 IP. >> I'm not sure if it's an OS thing or maybe a NIC thing? I've tried using >> different NICs. Tried the onboard (didnt work at all), and now I'm using a >> NIC on the dual-port card. I could try a port on the quad-port card as >> well. >> >> Has anyone had a similar problem? >> Here's some config info: >> Server NIC config: >> eth0 Link encap:Ethernet HWaddr 00:15:17:25:d4:38 >> inet6 addr: fe80::215:17ff:fe25:d438/64 Scope:Link >> UP BROADCAST RUNNING PROMISC MULTICAST MTU:1536 Metric:1 >> RX packets:4106983 errors:0 dropped:13869 overruns:0 frame:0 >> TX packets:89768 errors:0 dropped:0 overruns:0 carrier:0 >> collisions:0 txqueuelen:1000 >> RX bytes:401023113 (401.0 MB) TX bytes:29160705 (29.1 MB) >> Interrupt:17 Memory:d5ee0000-d5f00000 >> >> I noticed the NIC is showing quite a few dropped packets, the dropped >> packets are incrementing, but slowly. If I start a ping from CAT4 to R9, >> the dropped packets aren't incrementing with the ping. >> >> Breakout switch has system MTU set to 1546. >> >> I layed down the Ubuntu OS, ran recommended patches, then installed GNS3 >> and followed the above guide. That's all I've done to the host. Any >> thoughts? Thanks. >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> >> Are you a CCNP or CCIE and looking for a job? Check out >> www.PlatinumPlacement.com >> >> http://onlinestudylist.com/mailman/listinfo/ccie_rs >> > > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
