Cards on Different servers issues - issues

Issue

There is a posibility that HP Gen8 servers and Sangoma cards may have some issues that will have the following sympthoms:

1. PRI goes down for all card ports and the card stop working

2. While inspection the interrupts, we can see that they stopped to happen.

3. Card is connected, but ifconfig rx/tx/ counters are not incrementing.

4. cat/proc/interrupts - not incrementing as well

5. There are no errors in /var/log/messages and wanrouter restart does not help either. The only way to go, is to reboot the server

Cause

1. The kernel on CentOS 6 does not support X2APIC on HP servers

2. X2APIC is only supported on 3.2 kernels and greater( CentOS 7)

Resolution

1. The x2apic and aspm need to be disabled.

2.  Change in /boot/grub/grub.conf:

    Please see the working config for HP Gen8:

     title CentOS (2.6.32-573.8.1.el6.x86_64)

        root (hd0,0)

        kernel /vmlinuz-2.6.32-573.8.1.el6.x86_64 ro root=UUID=6c4b33bd-266e-4e32-a45d-d85cd5e8865f rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto                         KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quit pcie_aspm=off pcie_aspm.policy=performance acpi=off nox2apic intermap=off  elevator=deadline

        initrd /initramfs-2.6.32-573.8.1.el6.x86_64.img

Notice the kernel additional parameters : pcie_aspm=off pcie_aspm.policy=performance acpi=off nox2apic intermap=off