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I have a strange issue with linux hosts running kernel 3.x (e.g fedora 16, ubuntu 11.10), I am unable to SSH and traceroute (only tests done currently) hanging when travelling over a vlan network partition.

I have setup a test network with 2 hosts and a cisco router in the middle, SSH will hang when trying to connect between them. If i replace the OS on the hosts to say Fedora 12 the connection works correctly.

Has anyone experienced this, have a solution?

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How is this a vlan issue and not just a normal connectivity issue? Does it work when on a non-vlan? –  Paul May 31 '12 at 13:49
    
yes it does work on a non-vlan, sadly the cisco 861 router i wish to install into our network doesn't use non-vlan routing –  fir3x May 31 '12 at 13:52
    
So you confirmed by changing routers? Did anything else change when you changed routers? Are the vlans tagged or just configured on the ports? The reason I ask is that a host has no visibility of the vlan status of a port unless it is tagged. –  Paul May 31 '12 at 13:55

1 Answer 1

Check out this article on the HP website. I was looking up a different problem but I came across your question and the article and I thought it might help.

Solution

Even though this was reported as a bug with vlan lockups on a bonded set running in balance-alb mode, the kernel patch appears to have resolve the issue.

Click here to access the technical article available at https://bugzilla.redhat.com/show_bug.cgi?id=630540.

NOTE:The above-mentioned web link will take to a non-HP Web site. HP does not control and is not responsible for information outside of the HP Web site.

[RHEL5.5] soft lockup on vlan with bonding in balance-alb mode [rhel-5.5.z] in kernel 2.6.18-194.19.1.el5 linux-2.6-net-bonding-fix-alb-mode-to-balance-traffic-on-vlans.patch errata-xmlrpc 2010-11-09 13:07:22 EST

An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you.

Click here to access the technical article available at http://rhn.redhat.com/errata/RHSA-2010-0839.html.

NOTE:The above-mentioned web link will take to a non-HP Web site. HP does not control and is not responsible for information outside of the HP Web site.

The user upgraded the kernel and resulting in full communications being restored on all vlan and non-vlan channels.

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