View Issue Details
ID | Project | Category | View Status | Date Submitted | Last Update |
---|---|---|---|---|---|
0006665 | CentOS-6 | qemu-kvm | public | 2013-09-13 09:33 | 2013-10-25 11:21 |
Reporter | panda84 | Assigned To | |||
Priority | normal | Severity | major | Reproducibility | always |
Status | new | Resolution | open | ||
Platform | Intel PC | OS | CentOS | OS Version | 6.4 |
Product Version | 6.4 | ||||
Summary | 0006665: Guests can ping each other but not ssh when using MACVTAP + virtio device | ||||
Description | CentOS host updated @ 13 sep 2013 # uname -a Linux boltzmann 2.6.32-358.6.2.el6.x86_64 #1 SMP Thu May 16 20:59:36 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux # rpm -q qemu-kvm qemu-kvm-0.12.1.2-2.355.0.1.el6.centos.7.x86_64 The problem is similar to this one: https://groups.google.com/forum/#!msg/mailing.freebsd.bugs/gw42Il1AX0o/3zj-gnRKgHIJ Two guests (tried both Fedora 19 and Ubuntu 12.04, without change) both with: - MACVTAP to eth0 - device model: virtio - source mode: bridge The guests can ping each other, but cannot ssh or access to any service each other. | ||||
Steps To Reproduce | - CentOS 6 host - 2 F19 guests - MACVTAP to eth0 - device model: virtio - source mode: bridge - test ping: OK - test ssh: fail | ||||
Additional Information | Important observations: - changing ONLY the device model in both guests to "Hypervisor default" which is "rtl8139" or other device models solves the problem: they can ssh each other; - having only one guest with "virtio" makes it impossibile to ssh the guest with "rtl8139" (although as usual they can ping each other); - (not 100% sure to remember correctly, but quite likely) using a Fedora 17 host presents the same problem (I think qemu-kvm-1.0.1-6.fc17.x86_64) - (100% sure) using a Fedora 19 host fixes the issue: virtio guests can ssh each other (qemu-kvm-1.4.2-7.fc19.x86_64). Let me know if you need any other test or information. | ||||
Tags | No tags attached. | ||||
I see the kernel is still at -358.6.2. Any specific reason you are not running -358.18.1? (most current kernel) | |
Yes, the host keeps up several guests so I don't reboot often. If there's any indication kernel-2.6.32-358.18.1.el6.x86_64 might fix this I'd be glad to try. | |
I didn't check the change log, but it is available here https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.4_Technical_Notes/kernel.html | |
Tried the latest kernel, but the problem is still present immutated: # uname -r 2.6.32-358.18.1.el6.x86_64 All the updates have been applied. It's easy to reproduce: install two guests using MACVTAP and use virtio on one of the two. |
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Same problem on a recent kernel, so it's probably not a kernel problem: # uname -r 3.11.4-1.el6.elrepo.x86_64 |
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