It is no secret that the art of collaboration is being applied to all facets of technology. Unified Mobility has stepped up to the plate to encourage users to “man up” and become more productive in the work space. There are several pieces of unified mobility that offer companies a multitude of benefits such as: reduction in missed calls resulting in missed opportunities, eliminating call interruptions, and cutting back on roaming costs among others. In addition, this technology is adapting to a more simplified management style to accommodate the growing need of user communications. Therefore, it is fitting that we discuss these options further and begin providing insight into not only the user experience but how it is crafted on the back end.
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In this post we look at a sometimes misunderstood command, ip pim rp-announce-filter, and figure out how it is used to filter unwanted devices from becoming RPs. The topology for this example is very small, just two routers.

R1—R2

Requirements:

R1 = 1.1.1.1, R2 = 2.2.2.2

R1 is the Mapping Agent.

R1 should be the RP for 239.0.0.1.

No other router device should be allowed to be RP for any other group.
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Congratulations to:

• Craig Staffin CCIE #25802 (Voice)
• Andriy Yerofyeyev CCIE #21607 (Voice)
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This blog post will explain you all the differences in EtherChanneling that you can get. It’s known that you can get any type of wicked configuration on the R&S lab, especially since there are 4 switches, which are probably fully meshed with multiple links.

Why?

Etherchanneling is used in networks to have both redundant links and a double (or more) bandwidth link to another Catalyst switch. It also helps in forming a loop-free path and overcomes the issue of having 1 link in blocking (as you would when using Spanning Tree). On some router platforms it’s also possible to bundle links, but most times this doesn’t really work and you could run into problems while using it on different IOS versions.
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Often when you are a few hours into a lab, some things become a little hazy. You are flying by and everything is working as expected, then you run into a snag. You know the answer will be easy, once you find it. Forgetting to configure route reflection can be one of those things. In this post, we look at the show ip bgp neighbor command to figure how the router tells us that there is no reflection going on. This is of course assuming you couldn’t figure it out with a show run (which happens a lot!).

 
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