wriedel – Page 4 – F1-CONSULT

About wriedel

Principal Engineering Architect Delivering High-Value Solutions and Results

With leadership and in-depth experience in the technical and networking industry, I offer a proven track record of success and growth strategies. My expertise includes building solid client relationships, customer consulting, cost models, negotiations, and influential presentations. Successfully develop and maintain a thriving community culture within the Enterprise and Data Center Business Units, and Advisors. Contribute to solutions for stateless computing, virtualization, consolidation, workload mobility, and cross-functional collaboration with design, product, and engineering teams that produce significant results. As a constant innovator and problem solver I am very flexible in adapting to new challenges and technologies.

Career accomplishments include:
* Inventor of Pending Patent DNS-AS SDN solution, from concept to product
* Received Pioneer Award for contributing to LISP routing architecture in an Agile development environment
* Key contributor to CISCO Unified Computer System (UCS)

While at Cisco I achieved rapid career advancement with this world-class global organization and demonstrated success with multiple promotions including Principal Engineer. Generated top performing results, and gained personal experience including technical strategies, product development and management, business impact, and quality. Identified disruptive industry trends, built long-term approaches that drove results, and assisted with the technology developments that exceeded goals and expectations.

As a CCIE and VMware VCP, I excel at Cloud and Data Center design for enterprise customers and service providers across Europe. Created solutions for unified I/O, stateless server, virtualization, consolidation, workload mobility and scale out systems. Solutions for Software Defined Networking, and Software Defined Data Center.

Contact me today for consulting projects: wolfgang.riedel (at) f1-consult (dot) com

Entries by wriedel

CUBE

CISCO CUBE SIP DEBUGS

How to capture SIP traffic on a router monitor capture

<br />
!<br />
conf t<br />
no ip access-list extended sipgate-acl<br />
ip access-list extended sipgate-acl<br />
remark --- sipconnect.sipgate.de<br />
permit udp host <CUBE-IP> host 217.10.68.150 eq 5060<br />
permit udp host <CUBE-IP> host 217.10.68.150 eq 5060<br />
permit udp host <CUBE-IP> host 217.10.68.150 eq 5060<br />
!<br />
end<br />
!<br />
monitor capture SIP_cap access-list sipgate-acl<br />
monitor capture SIP_cap buffer circular size 100<br />
!<br />
monitor capture SIP_cap interface Gi0/0/2.31 both<br />
monitor capture SIP_cap interface Gi0/0/3.30 both<br />
!<br />
monitor capture SIP_cap start</p>
<p>sh monitor capture SIP_cap buffer dump </p>
<p>!<br />
monitor capture SIP_cap stop<br />
monitor capture SIP_cap export tftp://192.168.160.111/capture.pcap<br />
!<br />
monitor capture SIP_cap stop<br />
no monitor capture SIP_cap<br />
conf t<br />
no ip access-list extended sipgate-acl<br />
end<br />
!

conf t

no ip access-list extended sipgate-acl

ip access-list extended sipgate-acl

remark --- sipconnect.sipgate.de

permit udp host <CUBE-IP> host 217.10.68.150 eq 5060

end

monitor capture SIP_cap access-list sipgate-acl

monitor capture SIP_cap buffer circular size 100

monitor capture SIP_cap interface Gi0/0/2.31 both

monitor capture SIP_cap interface Gi0/0/3.30 both

monitor capture SIP_cap start

sh monitor capture SIP_cap buffer dump

monitor capture SIP_cap stop

monitor capture SIP_cap export tftp://192.168.160.111/capture.pcap

monitor capture SIP_cap stop

no monitor capture SIP_cap

conf t

no ip access-list extended sipgate-acl

end

2018-07-12/by wriedel

Linux

How to Disable or Enable Disk Write Caching in Linux

ATA-Based Disks Check out whether disk caching is enabled on your disk or not:

<br />
# sudo hdparm -i /dev/sdX</p>
<p>Note: replace the “/dev/sdX” with the correct address of your target device.<br />
The expected output will be similar below:</p>
<p>Model=WDC WD3200BPVT-22JJ5T0, FwRev=01.01A01, SerialNo=WD-WX61EC1KZK99<br />
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }<br />
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=50<br />
BuffType=unknown, BuffSize=8192kB, MaxMultSect=16, MultSect=off<br />
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=625142448<br />
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}<br />
PIO modes: pio0 pio3 pio4<br />
DMA modes: mdma0 mdma1 mdma2<br />
UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6<br />
AdvancedPM=yes: unknown setting WriteCache=enabled<br />
Drive conforms to: Unspecified: ATA/ATAPI-1,2,3,4,5,6,7</p>
<p>The words in red, WriteCache=enabled, means caching is enabled!

# sudo hdparm -i /dev/sdX

Note: replace the “/dev/sdX” with the correct address of your target device.

The expected output will be similar below:

Model=WDC WD3200BPVT-22JJ5T0, FwRev=01.01A01, SerialNo=WD-WX61EC1KZK99

Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }

RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=50

BuffType=unknown, BuffSize=8192kB, MaxMultSect=16, MultSect=off

CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=625142448

IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}

PIO modes: pio0 pio3 pio4

DMA modes: mdma0 mdma1 mdma2

UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6

AdvancedPM=yes: unknown setting WriteCache=enabled

Drive conforms to: Unspecified: ATA/ATAPI-1,2,3,4,5,6,7

The words in red, WriteCache=enabled, means caching is enabled!

To disable write caching, you need to edit hdparm.conf using your favorite editor (e.g. gedit, vi).

<br />
# sudo gedit /etc/hdparm.conf<br />
Uncomment the line “#write_cache = off” (without quotes) by removing the<br />
# at its beginning. So it looks like:<br />
# -W Disable/enable the IDE drive’s write-caching feature<br />
write_cache = off

# sudo gedit /etc/hdparm.conf

Uncomment the line “#write_cache = off” (without quotes) by removing the

# at its beginning. So it looks like:

# -W Disable/enable the IDE drive’s write-caching feature

write_cache = off

After making the changes, restart the server/computer and check out the write caching status again to make sure it’s disabled. If in case […]

2018-07-10/by wriedel

Windows Server

How to Delete All VSS Shadows and Orphaned Shadows

2018-06-25/by wriedel

News

Network Operating Systems

Network Operating Systems This page is an attempt to maintain a list of all network operating systems (NOSs) and network-centric applications that that are available in the market today, in no particular order. Network Operating Systems Sometimes it can be hard to tell the difference between a dis-agreggated “operating system” which is modular and open […]

2018-06-19/by wriedel

Security

GDPR

GDPR GDPR effects any company that handles personal data of EU citizens so also your company for example: if you are planning to do marketing e-mail campaigns which includes European customers, you have to ask their approval for sending to those e-mail addresses. You also need to describe for what purposes you will use their […]

2018-06-06/by wriedel

CUBE

CISCO IOS and IOS-XE Call Routing

In Depth Explanation of Cisco IOS and IOS-XE Call Routing Source: https://www.cisco.com Updated:June 13, 2017 Document ID:211306 Contents Introduction Prerequisites Requirements Components Used Common Definitions Command and Feature Roadmap IOS / IOS-XE Call Routing Fundamentals Voice Dial-Peer Types Inbound dial-peer Matching Outbound dial-peer Matching Number String Dial-Peer Hunting URI Dial-peer Hunting voice class uri Inbound URI […]

2018-06-04/by wriedel

SSD

Solid State Drives Technology Comparison – SLC, MLC, TLC NAND

SSDs (Solid State Drives) use NAND flash chips. Each of these chips contain millions of cells with limited number of write cycles. There are different types of NAND flash chips in use today with different characteristics as follows: SLC (Single Level Cell) – highest performance, at a very high cost, enterprise grade NAND ~ 50-100k […]

2018-06-01/by wriedel

SEO

Tools to check website keyword ranking

AntRanks – Keyword Rank Tracking in Search Engines Authority Labs – SEO Software for Search Engine Ranking Reports AWR – AWR: SEO Software, Website Rankings and Research Tools Link Assistant – Rank Tracker – track your search engine rankings easily! SEO Rank Monitor – SEO Rank Monitor – The Most Complete Ranking Tracker Serpbook – […]

2018-05-30/by wriedel

Security

Cybersecurity Conferences

2018-05-26/by wriedel

Email Encryption with PGP

OpenPGP is a non-proprietary protocol for encrypting email communication using public key cryptography. It is based on the original PGP (Pretty Good Privacy) software. The OpenPGP protocol defines standard formats for encrypted messages, signatures, and certificates for exchanging public keys. Beginning in 1997, the OpenPGP Working Group was formed in the Internet Engineering Task Force […]

2018-05-22/by wriedel

About wriedel

Entries by wriedel

CISCO CUBE SIP DEBUGS

How to Disable or Enable Disk Write Caching in Linux

Network Operating Systems

CISCO IOS and IOS-XE Call Routing

Solid State Drives Technology Comparison – SLC, MLC, TLC NAND

Tools to check website keyword ranking

Cybersecurity Conferences

Email Encryption with PGP

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