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How do prefix-lists work?

Wed, 26 Dec 2007 21:13:49 +0000
Prefix-lists are used to match on prefix and prefix-length pairs. Normal prefix-list syntax is as follows:

ip prefix-list LIST permit w.x.y.z/len

Where w.x.y.z is your exact prefix
And where len is your exact prefix-length
“ip prefix-list LIST permit 1.2.3.0/24″ would be an exact match for the prefix 1.2.3.0 with a subnet mask of 255.255.255.0. This does not ...]


Is this for the obsessive?

Wed, 21 May 2008 13:18:59 +0000
A useful command I thought I would quickly post about can be found below.  I didn’t know about this one before my CCIE studies; forgive me if this is well-known command to readers of this blog, i.e. my colleague had used this in the past:
BEFORE (An “Outside” ACL):



sho ip access-lists F4_In
Extended IP access list F4_In
    ...]

Frame Relay Traffic Shaping with GTS

Mon, 21 Jan 2008 10:31:18 +0000
As first and very basic option, you may use Generic Traffic Shaping to implement FRTS. This is a common technique, not unique to Frame-Relay, with the following properties:
- Configured by using traffic-shape interface command
- As with standard GTS, internal shaper queue is basic WFQ
- Configured per inteface/subinteface (no PVC granularity)
- GTS may adapt ...]


CCIE Week 1 - Core Crash

Mon, 05 May 2008 00:26:53 +0000
I went back to work last Thursday. The day started out as a normal day. Plowing through endless piles of e-mail. Trying to figure out what projects I should actually be working on. Reviewing change controls. After a while, a little problem comes up with a DSL line on one ...]

Sadly, the PIX Firewall is Discontinued…

Tue, 05 Feb 2008 12:02:52 +0000
What is the name that everyone thinks of when they think of firewalls? The “PIX” firewall, right?
Sadly, the PIX will be discontinued by Cisco, as of January 27, 2009.  This was announced on January 28, 2008 in this Cisco Press Release. If you are a PIX owner, the good news is that Cisco will support ...]

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