All_about_network

As I promised there goes some stuff I was having fun with lately. Followingscenario is from real life and includes some interesting combinations of features.

The problem is stated as follows:

1. AR 19-X is a CPE that is connected to ADSL (SHDSL) line of ISP
2. You need to use GRE tunnel for transporting L3 multicast (especially for OSPF) and IPSec for

As my days at Huawei Czech are getting to an end I would like to share as much as I was able to learn about some advanced stuff. To be exact I will publish three scenarios for hierarchical QoS on above mentioned routers. If time allows I will add also some stuff about VRFs.

So stay tuned… 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