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You are here: Home / Archives for Korey Rebello

Fun with GRE and HSRP

Korey Rebello December 29, 2015

I recently came across a design in which GRE tunnels were built utilizing HSRP VIP addresses. At first I was unsure of how well this would work so as usual I decided to lab it up. It turns out that this is an excellent counter design to having to place metrics or do any type…

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12 Comments

Use Rate-Limiting to Alleviate Link Saturation

Korey Rebello February 7, 2015

At some point in time you may come across a scenario in which you notice a WAN link at a branch site is being saturated. You then have to weigh your options to mitigate the saturation because it can cause intermittent network outages and other issues. In this scenario we will use rate-limiting on the…

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9 Comments

Destination Based NAT

Korey Rebello January 23, 2015

Here is the scenario: There is a public server on the internet that you have requested access to. The “admins” that control the server agree to allow a single public IP from your entity/company to access the server. The issue arises due to the fact that you “luckily” have more than 1 Public IP at…

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2 Comments

Establish Static Redundancy via DSL Connection

Korey Rebello December 3, 2014

It is a popular method for small businesses to utilize their local ISP’s business class DSL service. It is a also a great rule of thumb to multi-home your connection by using 2 separate ISP’s (Cox and Verizon for example). You would ideally want to either load balance your traffic between the 2 connections or…

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3 Comments

Configure a DMVPN Spoke behind a Home router/modem

Korey Rebello November 24, 2014

I’ve come across this scenario on multiple occasions now. Your company wants to set up a demo at a “customers” location. Your demo is reliant on its own router talking back to HQ to pull necessary data for the program in question. Unfortunately your internet connection at the “demo” site is sitting behind a NAT….

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5 Comments

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