PICOS System Troubleshooting

User can troubleshoot by checking system logs and PIcOS works mode.

Check log using two methods as follows:

NOTE:

Users should not put their other files in the /tmp directory, because the space size limit of the /tmp directory is 50M, once exceeded, it will lead to unpredictable system errors.

System logs are stored in two locations:

/var/log/messages

This directory is stored in Flash.

and

/tmp/log/messages

This directory is stored in RAM.

Switches use flash memory that has a limited number of lifetime write operations. Hence, it is important that logs are not written continuously to the flash memory. This would dramatically impact the lifetime of the flash memory.

This is why most of the log information is written by default on the /tmp directory.

admin@XorPlus$df
Filesystem     1K-blocks   Used Available Use% Mounted on
rootfs           6202636 900184   4987368  16% /
/dev/root        6202636 900184   4987368  16% /
tmpfs             207348     28    207320   1% /run
tmpfs               5120      0      5120   0% /run/lock
tmpfs             414680      0    414680   0% /run/shm
tmpfs              51200     36     51164   1% /tmp

The "/tmp" directory is mounted on "tmpfs" which is a filesystem mounted in RAM.

The tmp logs are moved to /var/log when dramatic events occur like system crash or system reboot.

Checking PicOS works mode as follows:

In L2/L3 Mode (Or XORP), only the XORP system is running.

admin@PicOS-OVS$ps aux | grep ovs | grep -v grep
admin@PicOS-OVS$
admin@XorPlus$ps aux | grep xorp | grep -v grep
root 16383 0.0 1.2 18100 6596 ? S Jan29 5:26 xorp_policy
root 16385 0.3 2.5 34980 13380 ? Ss Jan29 99:20 /pica/bin/xorp_rtrmgr -d -L local0.info -P /var/run/xorp_rtrmgr.pid

In OVS Mode, only the OVS daemon is running.

admin@PicOS-OVS$ps aux | grep xorp | grep -v grep
admin@PicOS-OVS$
admin@PicOS-OVS$ps aux | grep ovs | grep -v grep
root 1984 0.0 0.1 6696 2524 ? S Nov13 0:10 ovsdb-server /ovs/ovs-vswitchd.conf.db --pidfile --remote=ptcp:6640:10.10.51.166 --remote=punix:/ovs/var/run/openvswitch/db.sock
root 1989 25.6 1.5 113256 32392 ? Sl Nov13 1393:50 ovs-vswitchd --pidfile=ovs-vswitchd.pid --overwrite-pidfile