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Access-List Resequence April 27, 2009

Posted by ZoeL in CCIE LAB, Cisco.
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Inspired by some of my colleagues, they inform me one of unique and (according to them) not-so-oftenly-used cisco feature.

access-list resequence

… Users can apply sequence numbers to permit or deny statements and also reorder, add, or remove such statements from a named IP access list. This feature makes revising IP access lists much easier. Prior to this feature, users could add access list entries to the end of an access list only; therefore needing to add statements anywhere except the end required reconfiguring the access list entirely…

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PBR next-hop and default next-hop for redirecting packets (Case#2) April 22, 2009

Posted by ZoeL in CCIE LAB, Cisco.
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Here another case for PBR next-hop.
2 different networks with few clients, want to access SAP and nonSAP servers on headquarter via edge router, which is have two different path.

next-hop with 2 paths

R5 pretend as nonSAP clients, R4 as SAP clients and R3 have Loopback interfaces to represent SAP and nonSAP servers.

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PBR next-hop fail, caused by IP CEF and access-list’s logging April 19, 2009

Posted by ZoeL in CCIE LAB, Cisco.
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Yes, i know, there is no way informational logging message can disturb routing path or PBR scenario. There is actually, if your router’s cpu processing reach 100% caused by excessive logging messages and disturb routing updates. That’s not what happened here.

Below is my report of correlation between PBR, IP CEF and ACCESS-LIST LOGGING.

Network Diagram
next-hop scenario

EIGRP routing works on R2, R3 and R4. R1 and R5 running default route to adjacent router.
Dynamic routing automatically put one single most effective path from R1 to R5 via R2-R4.
Now, i want to ‘disturb’ this path and redirect packet from R1 to R5 via R3. We can accomplish this using PBR, match clause for specific source and destination IP address or Subnet using access-list and create set’s next-hop statement to throw packets to R3.

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How to : Shortcut aplikasi untuk digunakan di Command Prompt April 7, 2009

Posted by ZoeL in Desktop PC.
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Tujuan :

Membuat shortcut untuk aplikasi windows yang ingin bisa di akses dari direktori mana aja ketika berada di mode DOS Shell (command prompt).

Fasilitas windows yang digunakan :

path=, batch file (Dos Shell)

Contoh aplikasi :

securecrt software buatan Vandyke yang sering digunakan sebagai fasilitas terminal emulation alternatif pengganti Hyperterminal milik Microsoft. Biasa juga digunakan sebagai pengganti telnet (aplikasi bawaan internal windows).
Di modifikasi supaya software bisa di akses dari direktori manapun ketika berada di DOS Shell (Command Prompt) tanpa perlu mengakses desktop windows.

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