All_about_network

Ok so in my previous posts I described the most common config of IPsec with IKE. For troubleshooting this config there are few simple things one should check for basic troubleshoot.

No. 1 Check display IKE sa command in user view

Output of this command should show you two IKE entries. It is necessary to be two because if there is Continue reading

As on the AR 19-X boxes I had an opportunity to work on new VRP (which stands for Versatile Routing Platform and is equal to CISCO’s IOS) the version was 5.20 and 5.20 release 1618. I have to admit  that I was kind of disappointed. There are two major setbacks.

• The CLI is forcing you to use complete commands

This would Continue reading

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