It was holidays with family for two weeks. It was really peaceful.

Come back to CCIE studies and some blog posts begin of september.

Hope to see you soon on this blog. Christophe

It is been a while that I read some papers about EVC, flexible matching, … But I have not found a good paper explaining EVC and a way to understanding well except to cisco configuration guide.

 

This figure is exactly what I searched for. This example is simple but enough to understand well how it works.

My misunderstanding was about “ingress” and “symmetric” : I didn’t understand, but now with the figure that it is clear that :

BFD is a mecanism which give you access to a fast switchover for IGP, EBGP, … It is a RFC protocol : RFC5880.

BFD is a UDP protocol.

• BFD control : UDP / 3784
• BFD echo : UDP / 3785

BFD is in use on a segment, when a protocol needs it (such as : OSPF). It is configured by interface and called in protocol configuration. When BFD detect a failure it informs upper protocols and helps to make a better / quick convergence.

Surfing the web I have found this app for smartphone : networktools he.net.

It is really great :)

To understand well path through new chassis such as ASR9K, you could see this video (from Cisco Live 2014) and this blog post written by Ivan Pepelnjak, CCIE#1354. You could make a join between VOQ for QOS and LPTS/VOIP for ASR9K.

Have fun :)

It is not a news for CCIE student that today is the last day to pass CCIE lab in version 4. I hope the best for all the students whom will work hard today towards their digits.

Tomorrow is future : CCIE v5 is here. It is the version I will pass. A little review :

Bye bye to :

• Flexlink, ISL, Layer 2 Protocol Tunneling
• Frame-Relay (LFI, FR Traffic Shaping)
• WCCP
• IOS Firewall and IPS
• RITE, RMON
• RGMP
• RSVP QoS, WRR/SRR

Welcome to new technologies :

Sometimes you need to remove SSH so that your customer will be able to access SSH behind NAT.

You can do this by means of :

no crypto key generate rsa

you device will reply you : no no !! You must do this :

crypto key zeroize rsa

such as :

Router(config)#no crypto key generate rsa 
% Use 'crypto key zeroize rsa' to delete signature keys.

Router(config)#crypto key zeroize rsa
% All RSA keys will be removed.
% All router certs issued using these keys will also be removed.
Do you really want to remove these keys? [yes/no]: yes
Router(config)#

For those of you who are planning your CCIE v5 lab, it can be useful to plan it by means of a spreadsheet instead of the PDF you can download on CLN.

You can download a XLS file here : blueprint-ccie-lab-v5.

All is in the title. After more than one year to study, I pass today CCIE R&S Written v4 :)

In this first of may, OpenBSD is out with the version 5.5. Some news that you can read by yourself  here : http://www.openbsd.org/55.html Have good downloads and upgrade ;)

I have taken care of it to make some patches against nsh to compile against 5.5 :

• patch-if_var.sh.diff
• patch-tcpstat.diff