I have tried several variations of this on a 1721, and got nowhere.
However, I found something interesting.
I tried to troubleshoot this issue on an old c3000 running the 2500 code (the nice part of doing this is that you can indeed rule out if the IOS is the problem or the hardware).
On the 3000, using the standard db25-RJ45 adapters, it does not work (exactly the same symptoms as the 1721). However, I used an RS232 signal breaker, and I found that by shorting the DCD (8) and DSR (6) pins on the router side, I got it to work.
Since there is no DCD signal in any RJ45 AUX port, I came to the unfortunate conclusion that some routers have the DCD and DSR signals internally shorted, and some other routers don't. Someone please prove me wrong?
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...