Monday, September 24, 2012

Beware of Specials

I bought this at harbor town cause its on special, guess what happen when i got home & pill the 1st stick off.

hey! the price increased each time they do a massive discount, i guess its normal for any businesses.

so look out & ask is it really what you need?

Sunday, September 23, 2012

RANCID  - linux is cool
i haven't got much linux experiences but here is the setup steps for me


sudo apt-get update

Adduser rancid
Sudo Apt-get install rancid cvsweb mutt postfix

Sudo nano /etc/rancid/rancid.conf
LIST_OF_GROUPS="brisbane"

Sudo nano /etc/aliases
rancid-brisbane: rancid
rancid-admin-brisbane: rancid
Rancid: myemail@mycompany.com
newaliases

Sudo Chown -R rancid /var/lib/rancid
Sudo Chmod -R 775 /var/lib/rancid
Sudo Chown rancid logs
Sudo Chmod 775 /var/lib/rancid/logs
Cd  /var/lib/rancid/logs
Sudo Chmod 775 .


/etc/postfix/main.cf
Add smtp.mycompany.com
postfix restart

Su rancid

/var/lib/rancid/bin/rancid-cvs

cd /var/lib/rancid/brisbane

nano router.db
IPADDRESS_OR_HOSTNAME:brand:up_or_down


nano /home/rancid/.cloginrc
add autoenable * 1
add method * telnet
add user 10.11.61.11 admin
add userpassword 10.11.61.11 passwordhere
add password IPADDRESS_OR_HOSTNAME LOGINPASSWORD ENABLEPASSWORD
add password OTHERIP_OR_HOSTNAME LOGINPASSWORD ENABLEPASSWORD


chmod 640 /home/rancid/.cloginrc
chown rancid /home/rancid/.cloginrc

####- no need usermod -a -G sudo rancid


Rancid-run

Check router config
/var/lib/rancid/CVS/brisbane/configs

Check rancid log
/var/lib/rancid/logs

> crontab -e
- Add this line:
*/30  *  *  *  *  /usr/lib/rancid/bin/rancid-run



Add the Web GUI:
apt-get install cvsweb
nano /etc/cvsweb/cvsweb.conf
Find "@CVSrepositories"
Add:
'rancid' => ['Rancid', '/var/lib/rancid/CVS'],
Save and Quit
Restart apache
apache2ctl restart
sudo ~rancid/bin/rancid-run (or, if in as root, rancid-run)
You can now open a web browser to http://IPOFSERVER/cgi-bin/cvsweb




Too Much Information:
If you feel like you only want to have the configuration files and not the proc info/mem info etc, just edit the following file:
nano /var/lib/rancid/bin/rancid
Search for "# Main"
Comment out lines you no longer wish to document
Save and Quit


Thursday, September 6, 2012

Sharing a few good sites

do you want to do programming? here is the click and drag way! thanks MIT
http://sikuli.org/

watching BBC/Discovery outside of US/UK?
http://tunlr.net/

wanna listen to all the music, incl eng/chinese/jap?
http://grooveshark.com/

of coz if need a bargin here!
http://www.ozbargain.com.au/

High Performance Computing (HPC) on AWS


GPC come on!


Wednesday, July 4, 2012

Windows 7 Dual Nic Routing


When more than one network connection is available, Windows uses the
one with the lowest metric value. By default, it automatically
assigns a metric value based on the network connection's rated speed:

An explanation of the Automatic Metric feature for Internet Protocol
routes
http://support.microsoft.com/?id=299540

To force Windows to use a specific network connection, assign a metric
value to each one, giving the lowest value to the desired connection:

1. Open the Network Connections folder.
2. Right click the desired connection.
3. Click Properties > Internet Protocol (TCP/IP).
4. Click Properties > Advanced.
5. Un-check "Automatic metric".
6. Enter a number between 1 and 9999 for the "Interface metric".
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Desktop Experience)





          Dest Ip       Netmask       Gateway
route ADD 10.0.0.0 MASK 255.255.255.0 10.0.0.1
http://www.ni.com/white-paper/12558/en
http://serverfault.com/questions/21455/how-to-configure-dns-on-windows-with-multiple-nics
http://superuser.com/questions/337763/is-there-a-good-dns-server-i-can-install-on-windows-7-for-a-lan

Tuesday, June 12, 2012

Netgear ReadyNAS 3TB issues

NV+ V1 not support 3TB drive
NV+ V1 Revision V2 not support 3TB
NV+ V2 support 3TB

Note:

Unfortunately Netgear decided to name the new ARM based series of the ReadyNAS product line quite similar to the old Sparc products. So make sure to not confuse the Sparc based Duo/NV+ with their newer cousins Duo v2/NV+ v2. To make matters worse there are Duos on the market that have a "v2" sticker on their back - which actually means "Duo (v1) hardware revision v2". To easily identify what version of the Duo/NV+ you own, just open up the web interface for managing your ReadyNAS. They are quite different on the ARM based products.
  • On Sparc based products the web interface looks like this:
    Frontview on ReadyNAS Sparc 
  • On ARM based products it will look like this:
    Web Interface on ReadyNAS ARM

Physical difference



Similarly with the NV+ v1


and the NV+ v2



http://www.rnasguide.com/2012/01/09/how-to-tell-whether-i-have-a-duo-v1-or-duo-v2-or-nv-v1-or-nv-v2/


Readynas Compatibility List
http://www.readynas.com/hcl

A Few storage protocol compare

while i was doing some research on VMware, i also checking out storage performance.

iscsi, FCOE, FC

speed almost similar!!!



http://www-03.ibm.com/support/techdocs/atsmastr.nsf/WebIndex/WP101686
http://www.unifiedcomputingblog.com/?p=264
http://www.experts-exchange.com/Storage/Storage_Technology/Q_26337065.html
http://www.scribd.com/doc/82545381/EVA-v-P4000-A-Discussion

Tuesday, May 22, 2012

MPLS VPN with ASA IPSEC BACKUP


techtip_OSPF_2.jpg

the issue is when link R2 to PE2 is down, R1 will connect to R2 with no issue, but how other site connected to MPLS cloud gets the update? BGP?

https://supportforums.cisco.com/docs/DOC-5748

Sunday, May 20, 2012

MTU - PING

ADSL set MTU 1480

ethernet 1500byte
MSS = 1500-20(ip)-20(tcp) = 1460

therefore,  1452 + 20 (IP) + 8byte (ICMP) = 1480

C:\Users\jonny>ping 8.8.8.8 -f -l 1452

Pinging 8.8.8.8 with 1452 bytes of data:
Reply from 8.8.8.8: bytes=1452 time=48ms TTL=56
Reply from 8.8.8.8: bytes=1452 time=48ms TTL=56

http://smallvoid.com/article/tcpip-mtu-size.html
http://www.zytrax.com/tech/protocols/tcp.html
http://www.cisco.com/en/US/tech/tk175/tk15/technologies_tech_note09186a0080093bc7.shtml

Thursday, May 17, 2012

Recommended Book List


Network Warrior Gary A. Donahue - network engineer must read, this book have everything you needed to become an engineer not just technically but also from all other aspect.






Wednesday, May 16, 2012

CUCM 6.1(2) - 8.6

just garthering my documents

http://ciscovoiceguru.com/6177/cucm-upgrades-major-versions/
http://www.tek-tips.com/viewthread.cfm?qid=1557847
http://www.cisco.com/en/US/docs/voice_ip_comm/uc_system/unified/communications/system/versions/IPTMtrix.html#wp1016708
http://www.cisco.com/en/US/prod/collateral/voicesw/ps6790/ps5748/ps378/prod_brochure0900aecd8062a4f9.html
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/rel_notes/8_6_2/cucm-rel_notes-862a.html
http://www.cisco.com/en/US/docs/voice_ip_comm/cusrst/requirements/guide/srs86spc.htm
http://en.wikipedia.org/wiki/Cisco_Unified_Communications_Manager
http://www.gossamer-threads.com/lists/cisco/voip/159692?do=post_view_flat#159692
http://www.mentby.com/Group/cisco-voip/upgrading-cm-from-42-to-86-ios-upgrade-required.html
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/docguide/8_6_2/dg862a.html
http://www.cisco.com/en/US/products/sw/voicesw/ps556/tsd_products_support_series_home.html
http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/requirements/guide/33matrix.htm
https://puck.nether.net/pipermail/cisco-voip/2011-November/025050.html
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/install/8_6_1/install/cmins861.html


http://www.netcraftsmen.net/blogs/cisco-mobile-client-update.html
https://supportforums.cisco.com/docs/DOC-9124#/?page=2




https://supportforums.cisco.com/thread/2120218

7.1(2b)SU1 - direct upgrade
then 7.1(5b)SU5 / 7.1(3b)SU2 - >8.6

current support
http://www.cisco.com/en/US/prod/voicesw/ps6788/vcallcon/ps556/end_of_life_notice_c51-589088.html

http://tools.cisco.com/ITDIT/vtgsca/VTGServlet
https://supportforums.cisco.com/thread/2011367
https://supportforums.cisco.com/thread/2077678
http://www.gossamer-threads.com/lists/cisco/voip/140652
http://ciscoccvp.wordpress.com/tag/cisco-srst/
https://supportforums.cisco.com/thread/2078086
http://smbitsolutions.wordpress.com/2012/02/27/all-about-cisco-unified-srst/

Monday, May 14, 2012

Ip addressing rule


When allocating IP address space, endeavor to allocate a block that can be referenced
with a single access list entry.

Always allocate more IP address space than is originally requested.



GAD¡¯s Maxim #1: Network designs are based on politics, money, and
the right way to do it¡Âªin that order.


GAD¡¯s Maxim #2: The only valid reasons to change a properly
sized production network are simplification, standardization, and
stabilization.


GAD¡¯s Maxim #3: Companies only spend money on IT projects that
lower costs, increase performance or capacity, or increase reliability.


PathTest
my new tool for WAN link speed testing




http://blog.appneta.com/2011/12/27/iperf-and-pathtest-an-engineers-experiment/
http://www.testmypath.com/

Sick of small company email inbox?

I know lots of company still using exchange as office email solution where the cloud is not as stable as it yet.

however for personal emails instead using PST now you can use hotmail to do you backup 5GB space :)

you will need to an outlook hotmail connector, and follow below link.

once installed, you will have hotmail as a separate mailbox for you to drag and drop

View your Windows Live Hotmail e-mail in Outlook

http://office.microsoft.com/en-us/outlook/microsoft-office-outlook-hotmail-connector-overview-HA010222518.aspx
http://windowsteamblog.com/windows_live/b/windowslive/archive/2011/11/15/10-reasons-to-switch-to-hotmail-if-you-use-outlook.aspx
Cisco 877 ADSL by pass

if you need following kind of design use this on 877

---adsl router ---cisco 1811 router---lan
      by pass         external IP/FW

!
interface ATM0
no ip address
no atm ilmi-keepalive
pvc 8/35
encapsulation aal5snap
!
dsl operating-mode auto
bridge-group 1
!
!
interface Vlan1
no ip address
bridge-group 1
!
bridge 1 protocol ieee
!


http://forums.whirlpool.net.au/archive/920734

Sunday, May 13, 2012


UDT: UDP-based Data Transfer
-for High-Speed Wide Area Networks

If you have a LFN network and haven't got an WAAS device, try this below.

http://udt.sourceforge.net/
http://forums.networkinfrastructure.info/general-discussion/advice-needed-on-wan-performance-lfn-connection/
Full Mesh WIFI

Great idea!
like to have this protocol build in to every device so you will always have some time of connectivity.

http://owni.fr/files/2011/09/Building_a_Rural_Wireless_Mesh_Network_-_A_DIY_Guide_v0.7_65.pdf

Saturday, May 12, 2012

Cisco VPN config guide



after modification to accesslist
clear crypto isakmp 
ASIC Port Mapping

6500-1#show interface capabilities module 2 
    balababababaab
  Link Debounce Time:    yes
  Ports-in-ASIC (Sub-port ASIC) : 1-24 (1-12)
  Remote switch uplink:  no
  balbababaa

4500-1#show platform mapping ports interface gigabitEthernet 3/1
Interface  Gigaport  Phyport  Aggport    PimPhyport
Gi3/1      23        185      1          0 

3120X-1#sh platform pm if-numbers
interface gid  gpn  lpn  port slot unit slun port-type lpn-idb gpn-idb
----------------------------------------------------------------------
Gi1/0/1   1    1    1    1/6  1    1    1    local     Yes     Yes

Thursday, May 10, 2012

Will it be another Ron Paul?

he's idea are awesome, but how to implement maybe a big step.
911 coverup

who knows the big picture?

its all start when ppl start question why building 7 is a pre-planed demolition?

http://en.wikipedia.org/wiki/7_World_Trade_Center
http://www.youtube.com/watch?v=7OE3Adu4l0g

LFN - issues

http://www.riverbed.com/docs/TechOverview-Riverbed-RiOS.pdf
http://packetlife.net/blog/2010/aug/4/tcp-windows-and-window-scaling/
http://en.wikipedia.org/wiki/HSTCP
http://tools.ietf.org/html/rfc1323
http://en.wikipedia.org/wiki/Bandwidth-delay_product
http://en.wikipedia.org/wiki/Round-trip_delay_time
http://community.riverbed.com/t5/Steelhead-Appliance/hs-tcp-questions/td-p/5564
http://cisconet.com/traffic-analysis/traffic-analysis-general/413-internet-speed-issue-why-tcp-window-size-is-matter.html
http://www.networkworld.com/details/7591.html
http://research.microsoft.com/en-us/um/people/padhye/tcpworkshop/slides/raj_jain_high_speed_tcp.pdf
http://icfamon.dl.ac.uk/papers/DataTAG-WP2/reports/task1/20021001-Yee.pdf


WAN Acceleration hardware (and software) from vendors like Riverbed and Cisco have methods to optimize "Elephants" (LFN's or Long Fat Networks).
In Riverbed's case they combine TCP acceleration techniques, such as "Virtual Window Expansion (VWE)" or normal WAN links, but for LFN's (long-haul, high-latency links such as satellite) you can enable HS-TCP (High-Speed TCP - see RFC 3649). When using HS-TCP you need to calculate Bandwidth Delay Product to set the buffers.
VWE is a product of the use of "Scalable Data Reduction", or sending less over the WAN. SDR is not just compression, but clever use of storing data in bit-streams on WAN Accelerator disk and sending only "references" to that data when the same bitstream is requested over the WAN. SO it doesn't matter if the data is sent using FTP, CIFS or HTTP. Clever stuff.
In addition to optimising TCP, Other protocol-specific acceleration techniques can be used as well. "Read Ahead and Write Behind, MAPI pre-population.
The list goes on!

diagram

Wednesday, May 9, 2012

Was looking at difference between PC and Mainframe


The Opteron based computers achieved superior performance on a per processor basis. Performance gains were achieved through processor speed improvements and system architecture. When the cost of these Opteron machines was considered, their performance to price ratio is several multiples of the legacy mainframe computers.


http://dl.dropbox.com/u/25830953/nasa-pc-mainframe.pdf


How can I create a file of a certain size in Windows XP and later?


A. If you need to create a file of a certain size and the file contents don't matter, you can use the Fsutil command as follows:
fsutil file createnew <name of file> <size in bytes>
For example,
fsutil file createnew d:\temp\1mbfile.txt 1000000
creates a 1MB file named 1mbfile.txt in the d:\temp folder. I've successfully used this command to create a very large file to reduce the amount of free space when I was using a buggy installation program that couldn't address too much free space.