All_about_network

The ROMmon is a boot-loader on cisco routers and understanding its behavior as that is usually the last thing that twill save you when chips are down. This first article is about the confreg command in ROMmon as that is probably the most used one.

Confreg allows you to write hex values directly into the… Continue reading

After a long while I got a bit of time to write up new (even though rather short) post. In this particular case you would be able to find this information all around the Internet but again putting them on one place is quite useful at least for me.

Anyway long story short it had happened to… Continue reading

In cisco equipment there is one very irritating problem – it works only with “cisco” SFPs.

Well actually cisco is not manufacturing sfps so basically there is just some check going on inside the router/switch. It can drive you crazy if your only cisco sfp dies and you have nothing except for some normal 3rd party sfp (which is by cisco standard Continue reading