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Filtering CDP info
A cool new feature in IOS-XE 3.11S is the ability to filter CDP info. CDP is very handy, but also exposes too much information especially between us an a carrier or another enterprise. With Secure CDP we can remove certain information from the CDP packet. Lets take a look at an example.
First lets take a look at normal operating CDP information.
As we expected there is a lot of information there. Let's filter out everything except the Ports information and the Duplex info. Note that in the config we enter what we want filtered out not what we want allowed out.
Enter configuration commands, one per line. End with CNTL/Z.