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BrainTeaser 2

Wed, 27 Aug 2008 22:37:41 +0000
Well here is another one.
 
 
Scenario:
All routers should be configured in OSPF area 0.
The condition is that R2 only forms adjacency with R1 as long as frame-relay circuit is working fine. If frame relay circuit goes down, and R1-R2 adjacency is lost, R2 should automatically form adjacency with R3.
If frame-relay circuit comes back up, adjaceny between ...]

What It’s All About, Anyway.

Mon, 28 Apr 2008 20:06:05 +0000
What is it all about? Well, let me tell you. It’s about politics. Of course you knew I’d say that, being a political blogger, it isn’t that big of a stretch really. I know what you’re thinking. “Oh, I don’t really like politics, I don’t like talking about it, not really. Politics are boring.” Oh ...]

Unicast Reverse Path Forwarding-Tutorial

Thu, 10 Jul 2008 15:15:07 +0000
Unicast Reverse Path Forwarding is a small security feature

When configured on an interface, the router checks the incoming packet’s source address with its routing table. If the incoming packet’s source is reachable via the same interface it was received, the packet is allowed. URPF provides protection again spoofed packets with unverifiable source.
Though basically a single ...]

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