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Operating System and Software
- Rocky Linux 8 with
libteam-1.28-4.el8or earlier - CentOS 7 with
libteam-1.27-6.el7_6.1.el7or earlier - Teaming with LACP runner
Problem
-
I’ve configured 2 team lacp interfaces both consisting of 2 ports using NetworkManager.
After reboot, every interface is up with only 1 port in it. -
messages file or journal/
journalctlreports a NetworkManager or teamd error like:
Loop callback failed with: Cannot allocate memory
How to Fix
- Rocky Linux 8 – Update teaming packages version to
libteam-1.29-1.el8or later (Errata RHBA-2020:1809) - CentOS 7 – Update teaming packages version to
libteam-1.27-9.el7or later (Errata RHBA-2019:2310)
Origin of the Problem
The errors indicate that the teamlib function send_and_recv() called nl_recvmsgs() which failed with -ENOMEM. Therefore the 2nd slave was not added to the team.
The error occurs because the netlink socket receive buffers for that team entry was too small.
Repaired upstream by increasing the netlink socket buffer size used in libteam: libteam: double NETLINK_RCVBUF to fix -ENOMEM error
Included in CentOS 7 on Red Hat Private Bug 1689774 and in regular package updates in Rocky Linux 8.
Diagnostic Steps
- Enable teaming debug and look for the following errors:
eth0: Failed to set "priority".
Loop callback failed with: Cannot allocate memory
Failed loop callback: libteam_events, 0x
- Then after boot
teamdctl teamX statewill show that only one slave is added.
