Vyacheslav, Автор в IT Blog

How to save IPTables rules

In this article, I will describe several options for saving IPTables rules so that they load when the operating system starts.

Solution: No /etc/rc.local file on Ubuntu 18

I once noticed that by default there is no /etc/rc.local file in Ubuntu 18, but it can be created.

How to restore BDCOM OLT configuration

Suppose you want to restore the BDCOM OLT configuration from a previously made backup.

BDCOM OLT Recovery

Once an incorrect firmware was loaded into one of the OLTs, because of this, it cyclically rebooted.

Once it was necessary to monitor the level of the optical signal to the BDCOM OLT P3310C and P3608-2TE, after the trunk cables of different quality could stretch in the summer, and thus we lost contact with one of the OLT, although this situation could be predicted and prevented.

VLAN Generation Script for Netplan

Once it was necessary to add several hundred VLANs without IP addresses to the Netplan configuration and in order to simplify the process, I came up with the following script:

Accel-ppp. error nl_modify: File exists

Once I noticed the following error in the /var/log/accel-ppp/accel-ppp.log:

Accel-ppp session termination script

I will give an example of a script to end the sessions taken on the official telegram channel Accel-ppp. Using accel-cmd and grep, we select the necessary sessions, for example, by the speed of the shaper, or part of the IP address, for example 10.10.10. and then for example send these sessions terminate if ipoeX soft or hard via accel-cmd.

Configuring DHCP Snooping on Edge-core

Let me give you an example of setting up DHCP Snooping on Edge-core switches, for the test I’ll take the ES3526XA model.

BDCOM OLT: LLID sequences have been used up on EPON

One day, a technician connected a client and informed me that the ONU is not registering with one of the BDCOM P3608-2TE EPON OLT. I looked at the logs:

Author Archives: Vyacheslav