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x86 Scale Up

I have been introduced to a very cool software/hardware combination yesterday. It has been, without exaggerating, one of the coolest things I have seen in a while. As you may know, x86 has an issue with scaling up. It’s that x86 architectures and price don’t justify scaling up to tenths and hundreds of CPUs. The…

Bonding in RedHat RHEL4

This is a rather common knowledge now that on RHEL4 you need to state inside /etc/modprobe.conf the following line, when you want more than one bonding interfaces: options bonding max_bonds=2 Then you attempt to use a trick to address different bonding devices with their name (aka, bond0 and bond1, and maybe bond2, etc), using an…

Vlan Tagging with bonding network interface on RHEL4

This is not a simple task, as there are few things which should actually happen for it to work. First – the switch port should support vlan tagging (of course, right?) I have used vlan2 for “external” network, and vlan3 for “internal” network. My configuration looks like this: ifcfg-eth0: DEVICE=eth0 BOOTPROTO=none ONBOOT=yes MASTER=bond0 SLAVE=yes ISALIAS=no…

AP acting as a repeater (WDS protocol) – Apple AirPort as a repeater of Linksys WRT54G

In a given place, an AirPort has been connected to the Internet. A Linksys router was added, however, it does not support acting as repeater, however, hidden, there is the ability to act as a WDS master. The secret is based on the following steps, using the default firmware: 1. Setup Linksys for WEP, setup…

Network Bridge

Unlike the expected header, this is not about silently routing packets between interfaces, or bridging multiple networks. This is all about how ants, which find the summer the best time to start investigating our place, can show innovativeness, and can prove that even ants can use network bridges, when required. The cable was in-air, not…