Posted on in system_administration
As discussed previously, we're going to enable RFC 1323 Window Scaling and increase the default TCP receive and send windows to 1 MB. By default Windows 2000 and XP do not offer window scaling options, but will accept them if offered by the other side. To make our changes, we'll …
Posted on in system_administration
As we have throughout the
TCP Performance Tuning
series, we're going to make sure RFC 1323 Window Scaling is enabled and increase
our send and receive window size to 1 MB. The ndd command is the Solaris
equivalent of sysctl in FreeBSD/Linux/Mac OS X.
sudo ndd -set /dev …Posted on in system_administration
Because Darwin is BSD-based, it's no surprise that Mac OS X TCP Performance Tuning is very similar to FreeBSD TCP Performance Tuning. It is no longer necessary to enable RFC 1323 TCP Extensions (in fact, the option to do so is gone). Also, we'll set the TCP send and receive …
Posted on in system_administration
If you have been following our
TCP Performance Tuning series, you'll know
that we want to enable RFC 1323 Window Scaling and increase the TCP window size
1 MB. To do this, we'll add the following lines to /etc/sysctl.conf and issue
sudo sysctl -p to apply the changes …
Posted on in System Administration
The original TCP specification included a window size no larger than 64 KB. This limitation was introduced by the 16 bit header that specified window size. To achieve the recommended 1 MB window size, RFC 1323 TCP extensions must be enabled. The rest of this post is a somewhat detailed …
Posted on in system_administration
Note: Stanislav Shalunov wrote an excellent article on TCP over WAN Performance Tuning and Troubleshooting. In this series of articles, I want to summarize his findings and provide tuning suggestions for popular operating systems.
Most operating systems today ship with TCP stacks optimized for either LAN (high speed, low latency …
Posted on in Networking
Deciding whether to use <acronym title="Remote Authentication Dial-In User Service">RADIUS</acronym> or <acronym title="Terminal Access Controller Access Control System Plus">TACACS+</acronym> for <acronym title="Authentication, Authorization, Accounting">AAA</acronym> functionality on a Cisco-based network seems straight-forward. After all, if the network uses Cisco, shouldn't the AAA …
