Networking

數據中心比線路比較 | NWT (HKBN) | IXTech

主要使用 http://ping.pe/ 網站來測試由不同國家及地區連到兩個不同數據中心的ping 值及路由. 測試得知, NWT (HKBN) 在香港及國內以外地區, 主要是使用 telia.net 及 gtt.net 作為海外骨幹線路 而 IXTech 則主要使用 Telstra Global 及 iptp.net 作為海外線路. 在測試後, 對比得得出以下結論: 在美國, IXTech 比 NWT-telia 較優勝 在意大利,  NWT-telia 比…

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Linux Ethernet Bonding – load balancing / active-passive

This is a notice in the topic of Linux Ethernet Bonding with two ethernet NIC

The case:
There is a server with two ethernet NIC. They are going to be set as either load balancing or active-passive mode.

  1. For load balancing (round-robin) – mode = 0, this is the default, transmitting packets in order from the first available slave through the last, for load balancing and fault tolerance.
  2. For active-passive – mode = 1, Only one of the bond slaves is used, and the others act as stand-by mode. Once the active one failure, after particular time period (miimon=xxx), the stand-by one will take over and resume the network connection.

(more…)

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經SSH翻牆@CityU

今日要上cs4280, 但正直要試 linux mdadm raid 1 disk expandion 先不可以經lab 去連vnc 相關的port. 那即時上網找找ssh 番牆的方法. google 大佬真係勁, 首幾個post 就已答到我問題 Jamyy's Weblog - PuTTY - SSH Tunnel 運用備忘 提到用ssh tunnel 的方法. 用Dynamic Tunnel…

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Dell 2950 Dual E5420 + CentOS + KVM + Eth0 Bridge Mode

今日代人入手 Dell 2950 , 拎完番來即"操"佢. 玩完佢個DRAC5 後,  就即安OS 安過VMware ESXi (但用Client 連線失敗), 之後都係直接安CentOS 5.4 64bit. 再玩Virtual Machine - KVM. 先係安個XP, 再安VISTA, 再安CentOS. 但發現Win XP 運行時係會拎個分俾佢用的CPU Full Loading. 但CentOS 又冇事. 找一找RH…

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