ipBalance

If you want to hide 'Administrator' account on window XP logon screen

1. Run 'regedit.exe' from and find 'UserList'

It took a time to figure out how to make it work RADIUS on Cisco ACS server. Actually, it was fairely easy to setup. 

1. Setup RADIUS option on Interface configuration mode.

LFI stands for Link Fragmentation and interleaving is not of QoS mechanism. However, it is help for real-time traffic such as VOIP on small size of link. LFI on Multilink PPP allows large packets to be fragmented into a small size to fit a minimum delay requirement for real-time traffic. Also, interleaving function provides a special transmit queue for the high priority traffic can be sent earlier than others.

1. Configuring LFI on Multilink PPP

Router-LFI-1#conf t
Router-LFI-1(config)# interface multilink 1
Router-LFI-1(config-if)# ppp multilink fragment delay 10 ; 10ms for VOIP delay requirement
Router-LFI-1(config-if)# ppp multilink interleave
Router-LFI-1(config-if)# ip address 1.1.1.1 255.255.255.0
Router-LFI-1(config-if)# bandwidth 1536 ; Specify for auto fragmentation calculation
Router-LFI-1(config-if)# ppp multilink endpoint hostname

Router-LFI-1(config-if)# interface serial1/0
Router-LFI-1(config-if)# encapsulation ppp
Router-LFI-1(config-if)# ppp multilink group 1

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Part I

So slow Internet connection after scheduled maintenance on upstream provider(ISP). It could be multiple reasons such as software issue, hardware failure, bad patch cable , dirty fiber and trunk issue. Those are very rare case. Lately I noticed more trouble with MTU mis-setting on backbone routers. When ISP expends their backbone trunk, they put TenGigE card instead of SONET in these days. No wonder why they do that b/c GigE or TenGigE card is much cheaper then SONET card.

Here is common mistake is that the forget to change default MTU size(1500) of the fresh card from the box. Most of ISP set MTU on their backbone as upto 9180 or at least bigger than 1524 bytes (due to VLAN tag for internal use). Again, this is very rare case, but it happens. See how to verify MTU size wrong in the ISP backbone.