Bug 738610
| Summary: | The network-bridge script does not set the MTU of the bridge to match the MTU of the physical interface | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | RHEL Program Management <pm-rhel> |
| Component: | xen | Assignee: | Xen Maintainance List <xen-maint> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | high | Docs Contact: | |
| Priority: | medium | ||
| Version: | 5.6 | CC: | drjones, jzheng, leiwang, mrezanin, pbonzini, plyons, pm-eus, qguan, qwan, xen-maint, yuzhang |
| Target Milestone: | rc | Keywords: | ZStream |
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | xen-3.0.3-132.el5_7.1 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-10-24 17:14:20 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 733417 | ||
| Bug Blocks: | |||
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Description
RHEL Program Management
2011-09-15 11:31:02 UTC
Fix built into xen-3.0.3-132.el5_7.1 Verified with xen-3.0.3-132.el5_7.1. Test env setup: 2 hosts of RHEL5.7.z x86_64: kernel: kernel-xen-2.6.18-274.5.1.el5 Network card: Intel Corporation 82566DM-2 Gigabit Network, driver: e1000e xen: xen-3.0.3-132.el5_7.1 Guest RHEL5.7.z x86_64 PV guest: kernel: kernel-xen-2.6.18-274.5.1.el5 [1] Connect the 2 hosts with a crossover cable [2] Configure the 2 hosts to use static ip and set MTU=9000, like this # cat /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 HWADDR=00:23:AE:6F:F6:3D BOOTPROTO=static IPADDR=192.168.0.1 NETMASK=255.255.255.0 MTU=9000 ONBOOT=yes eth0 is the interface connect to the crossover cable, and xen bridge connects to eth0: # cat /etc/xen/xend-config.sxp (network-script 'network-bridge netdev=eth0 bridge=xenbr0') similar configuration on the other host. [3] install the PV guest, update kernel to zstream kernel and configure the virtual nic to use static ip (in the same subnet of host) and MTU=9000, guest is using xenbr0. [4] boot up the PV guest with the configuration in step [3]. [5] migrate the guest between the 2 hosts. Test result: 1. After step [2], the interfaces eth0, peth0 and xenbr0 shows up with MTU=9000 in ifconfig output. 2. After step [4], the interface of backend vif has MTU=9000 in Dom0 (e.g. vif2.0)ifconfig output. The ifconfig output within DomU aslo has MTU=9000 for frontend interface (e.g. eth0) too. 3. After step [5], the interface of backend vif on the destination host has MTU=9000 in Dom0 (e.g. vif2.0)ifconfig output. The ifconfig output within DomU aslo has MTU=9000 for frontend interface (e.g. eth0) too. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHSA-2011-1401.html |