Author Archives: oldboyscout

ASA TCP Connection flags

The really good reminder about ASA TCP Connection flags http://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/113602-ptn-113602.html I just keep URL here, because I forgot this today, and this is really good explanation.

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A few things about IOS XR upgrade

1. If you do this after October 2015, you need to add “fake” certificate and special SMU (activate, then deactivate). More details you can find here 2. You need to be patient until upgrade will be finished and don’t be scared about many warnings during this process – some parts of IOS XR can create … Continue reading »

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Incredible Adventures of the OSPF Huawei

We found SUDDENLY that OPSF with hello-timer=1 on the Huawei NE40E got convergency more then 20 seconds. And any changing of timers is not helped. We have schemes with such timer value, the reason is some old equipment without BFD. And everything worked fine 1-2 month ago. Official Huawei TAC respond — For mitigation OSPF … Continue reading »

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SPCORE exam (642-887)

It is just list of free materials for my preparation to Cisco SPCORE exam. I have hard copy of old Cisco MPLS and QoS courses, other links just were googled. This list will help somebody don’t waste time for googling. Another nice description about SPCORE\SPEDGE exams here

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SPEDGE exam (642-889)

It is just list of free materials for my preparation to Cisco SPEDGE exam. I have hard copy of old Cisco MPLS course, other links just were googled. This list will help somebody don’t waste time for googling. The list of topics is here.

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NBASE-T

There is just fresh presentation about NBASE-T and new Cisco Catalysts models for it. Interesting technology for every company, that has the huge infrastructure with cat5e cables. Waiting for other vendors and for NICs and Wireless AP.

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Cisco Live Milan 2015 — «advanced», «routing»

I have read and analyzed materials from Milan Cisco Live 2015 – for self-education. Not all 455 presentations and videos, of course. Only Level=”Advanced” and Technology=”Routing”. Maybe someone will be interested to know my comments and recommendations below.

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Cisco Live Milan 2015

Cisco Live Milan 2015 is over. All presentations are here, as usual. I have plan to create overviews about most interesting presentations. Maybe next week.

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Huawei Eudemons

Eudemon Series there are firewalls\IPSeC gateways, but with router functions inside. Something like Juniper SRX, but functionality is cheaper and from Huawei. The hardware of these devices is ok, but software is so crude. The chinese guys must to work hard a lot of time for fix it, I think. Just from the last rebooting … Continue reading »

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just think about bureaucracy

The stupid order is much worse than flexible chaos. Create big, hard and ordered system and it will be first step to your final destruction in modern world.

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