How To Configure QoS To Conform To Standard Marking Schemes

I was looking for more informations about QoS traffic marks, in particular about EF mark, trying to prioritize voip traffic …and i’ve found this doc very clear and “efficient” in explaining QoS tecniques.

This How To Note describes also how to deploy a QoS solution across an entire network.

I suggest reading it all !

http://www.alliedtelesyn.com/media/datasheets/howto/config_qos_standard_schemes.pdf

PS: EF means Expedited Forwarding. This traffic is given highest priority. Packets being given this treatment are prioritized ahead of all other types of data.

lost ssh access to cisco pix

sometimes it happens that tring to connect via ssh to a pix firewall you receive this error:

> ssh_exchange_identification: Connection closed by remote host

i found on internet this solution that worked for me; the trick is regenerating the RSA key of the pix with these commands:

ca zeroize rsa
ca generate rsa key 1024
ca save all

On new ASA appliance, like ASA 5505, the new commands are:

crypto key zeroize rsa
crypto key generate rsa general-keys
ca save all

File Transfer Time/Speed Calculator

Use this calculator to estimate file upload, download or transfer speed.  Actual transfer speeds may be a bit slower than these times due to reasons described below in web page

http://www.t1shopper.com/tools/calculate/downloadcalculator.shtml

Create a file of a certain size in Windows XP and later

If you need to create a file of a certain size and the file contents don’t matter, you can use the Fsutil command as follows

fsutil file createnew <filename> <filesize in byte>

For example,

fsutil file createnew d:\temp\1mbfile.txt 1000000

creates a 1MB file named 1mbfile.txt in the d:\temp folder. I used this command to create files of different sizes to make some local network speed test