| Summary: | Increase mtu on a physics device,the mtu on vlan device cannot be changed | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Liang Zheng <lzheng> |
| Component: | kernel | Assignee: | Red Hat Kernel Manager <kernel-mgr> |
| Status: | CLOSED NOTABUG | QA Contact: | Red Hat Kernel QE team <kernel-qe> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 6.2 | CC: | kzhang, wpan |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-11-14 07:02:42 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
Since RHEL 6.2 External Beta has begun, and this bug remains unresolved, it has been rejected as it is not proposed as exception or blocker. Red Hat invites you to ask your support representative to propose this request, if appropriate and relevant, in the next release of Red Hat Enterprise Linux. Hi, Liang Zheng, I've posted a patch to upstream, http://marc.info/?l=linux-netdev&m=131806865926989&w=2 But it is rejected, and the maintainers do not think this is a bug. Since we can change vlan device's mtu manually, so the current behaviour is fine as it is. So feel free to close this bug if you agree. thanks Weiping Pan |
Description of problem: Default mtu on physics and vlan device are 1500,when change physics mtu to 1600,VLAN device's mtu is still 1500. Certainly,you can change vlan device's mtu to 1600 manually, but I think when you change physics device's mtu ,VLAN's mtu should be changed automatically instead of by manually. Version-Release number of selected component (if applicable): kernel 2.6.32-202.el6 How reproducible: 100% Steps to Reproduce: 1.vconfig add eth4 3 2.ifconfig eth4.3 3.ifconfig eth4 mtu 1600 4.check mtu on eth4.3 Actual results: Expected results: Additional info: case NETDEV_CHANGEMTU: for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { vlandev = vlan_group_get_device(grp, i); if (!vlandev) continue; if (vlandev->mtu <= dev->mtu) continue; dev_set_mtu(vlandev, dev->mtu); }