Have you tried using the generic NIO in GNS3 instead of the Linux one? Tried disabling NIC hardware VLAN accel with ethtool?
-Keller On Oct 19, 2012 1:20 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
