Wednesday, August 13, 2008

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A Featured cisco cbt Article

News about cisco cbt

DMVPN Explained

Sat, 02 Aug 2008 11:51:45 +0000
DMVPN stands for Dynamic Multipoint VPN and it is an effective solution for dynamic secure overlay networks. In short, DMVPN is combination of the following technologies:
1) Multipoint GRE (mGRE)
2) Next-Hop Resolution Protocol (NHRP)
4) Dynamic Routing Protocol (EIGRP, RIP, OSPF, BGP)
3) Dynamic IPsec encryption
5) Cisco Express Forwarding (CEF)
Assuming that reader has a general understanding of what ...]

NTP Access Control

Tue, 29 Jul 2008 05:24:56 +0000
NTP security goal is to prevent unauthorized time sources to affect time synchronization within a set of network devices. Cisco IOS offers two methods of securing NTP infrastructure:
1) NTP Access Control. Limit types of NTP access and NTP sources associating with out router.
2) NTP Authentication. Validate the identity of NTP sources.
Let’s see how access control works. It ...]

IEWB-RS-VOL1-V5 Beta Bridging & Switching Labs - Major Update

Fri, 18 Jul 2008 21:28:42 +0000
IEWB-RS Volume I Version 5 Bridging and Switching labs are now significantly updated with the detailed breakdown sections and are posted on the members site. This section alone is nearly 200 pages now. A sample of them can be viewed here. Questions and comments should be posted on the ...]

Understanding WRR Queue Parameters

Sun, 20 Jul 2008 16:17:34 +0000
I found it important to make a small post in reply to the following question:

Hi Petr
i’m still confused between
mls qos min-reserve and wrr-queue bandwidth
what is the difference between the two
thx

The 3550 WRR (weighted round robin) scheduler algorithm utilizes four configurable queues at each interface of the switch. Let’s consider just FastEthernet ports for simplicity in ...]

Time of Day routing

Wed, 02 Aug 2006 07:04:16 +0000
Rule of thumb.
a. First analyze and group the time-period for which you want the partition to be active. This could be business hours (M-F, 8-5 for say).
b. If the time slots cannot be grouped into one time period, define multiple time periods.
c. Group all timeperiods into one time schedule.
d. apply time schedule to partitions and ...]

IEWB-DYN Lab 9

Sun, 02 Mar 2008 10:17:55 +0000

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