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mirror of https://github.com/xcat2/xcat-core.git synced 2025-07-19 02:51:09 +00:00
Markus Hilger a274097b34 Do not set MTU for InfiniBand slaves
Slaves should have no MTU set. This should be set globally on the bond interface.
Furthermore, RHEL 8.0 does not correctly set the given MTU as shown below.
This breaks any IB bonds with non-default (2044) MTU.

$ # IB slave with 4092 MTU
$ nmcli con add type Infiniband con-name slave-ib1-mtu mtu 4092 ifname ib1 master ibbond0 slave-type bond
$ # IB slave without MTU
$ nmcli con add type Infiniband con-name slave-ib1-wo-mtu ifname ib1 master ibbond0 slave-type bond

$ # should be 4092, but is 2044 instead
$ nmcli -f infiniband.mtu con show slave-ib1-mtu
infiniband.mtu:                         2044

$ grep MTU /etc/sysconfig/network-scripts/ifcfg-slave-ib1-*
/etc/sysconfig/network-scripts/ifcfg-slave-ib1-mtu:MTU=2044

$ # is auto :)
$ nmcli -f infiniband.mtu con show slave-ib1-wo-mtu
infiniband.mtu:                         auto
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xCAT

xCAT is a toolkit for deployment and administration of clusters of all sizes.

Documentation

xCAT Documentation is hosted on Read The Docs: https://xcat-docs.readthedocs.io

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Open Source License

xCAT is made available under the EPL license: https://opensource.org/licenses/eclipse-1.0.php

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