STP Overview

Ethernet Part III

Ethernet Error Analysis
When characterizing the health of an Ethernet segment the kind of errors captured and their quantity will differ as to how they will effect the segments ability to service upper-layer protocol forwarding.  There are six primary error types that can be received on an Ethernet interface:

Local Collisions
Remote Collisions
Late Collisions
CRC/Alignment Errors
Long/Short Frame
Jabber

Local Collisions
This type [...]

Cisco Troubleshooting Commands – 1

1.  Show interface counters protocol status

-Description
This command is an unpublished Cisco command that is available in ver 12.2 and above and shows us the interface and protocol status. As you can see below, each interface is listed with its corresponding list or running protocols.

-Uses
This command can be used to verify [...]

CCIE Pursuit Link

I’m an idiot.  So when I built the blogroll I apparently put in the CCIE Pursuit link in wrong.  I fixed it.  As it turns out, it’s one of the best blogs out there, so check it out when you have time.
~Brent

Goodbye To You EIGRP Neighbor

So I ran into this inform message today that I had never seem before:

As it turns out, an improvement in 12.3(14) added the Goodbye message to let EIGRP peers know the local process was being brought down.  A note in the Cisco documentation indicated that if there is a device running an earlier version of [...]

CCIE R&S Lab Study Update – 23 Jan

This was a horrible week for studying.  Workload was a monster, my equipment crapped out, & Dynamips is running poorly on my Macbook.  To top it off, as of today I am 90 days out.  So, the next three months are looking tougher.  I have a good supporting cast at home and at work, so [...]

Lab Execution Question

Lab 9 Task 4.8 Problem Identified

IE-WB3:Lab 9 4.8

I am having problems configuring an IPIP tunnel between Sw1 and R5 on my personal equipment. I have built the tunnel with IPs advertised into Area 0, and have ensured that the tunnel destinations are not learned via OSPF
I am pretty sure that this is an issue with my equipment. When [...]

CCIE R&S Lab Study Update 16 Jan 2009

CCIE R&S Lab Update 16 Jan 2009
This weeks progress

Completed one of the planned Core Labs

Lab 1

No Questions

Lots of review scenarios are needed

OSPF Route Filtering

OSPF Stub Area rules

BGP Best Path Selection rules

Regular Expressions

TCL Scripts

Redistribution

Worked through half of the Bridging & Switching section of IE-WB1

Not making as much progress as I would like [...]