Monday, July 5, 2021

Serial Console over RJ45 Ethernet-Patchpanels / RS232-Ethernet-Pinout?

Hello Guys,

we recently purchased an Avocent ACS8000 terminal server/console server for an OOBM for one of our customers, to have remote connections to local devices serial console ports. (mainly Cisco switches)

http://42u.com/pdf/Manual_Avocent-ACS-8000_userguide_501a.pdf

We also have to reach switches in a different fire compartment. Therefor we have to use standard Ethernet patchpanels. So now we are wondering how to cable it up!?

The Avocent terminal server has RJ45 ports with RS232 pinout.

The Cisco switches also have RJ45console ports, which are supposed to be rollover?

Page 5: https://www.cisco.com/c/en/us/td/docs/security/asa/hw/maintenance/5585guide/5585Xhw/pinouts.pdf

So now I am wondering, do we just use rollover cables?

[Cisco Console Port] - [rollover cable] - [RS232 port on Avocent terminal server]

[Cisco Console Port] - [rollover cable] - [Ethernet patchpanel] - [Ethernet cable] - [RS232 port on Avocent terminal server]

Or do I use the included Cisco RJ45-DB9 console cable (which is supposed to be doing a rollover already) on the switches and then a DB9(male)-RJ45 adapter.

[Cisco Console Port] - [Cisco console adapter RJ45-DB9] - [DB9-RJ45 adapter] - [Ethernet cable] - [RS232 port on Avocent terminal server]

[Cisco Console Port] - [Cisco console adapter RJ45-DB9] - [DB9-RJ45 adapter] - [Ethernet cable] - [Ethernet patchpanel] - [Ethernet cable] - [RS232 port on Avocent terminal server]

I am sure, I am not the first with this question, so there has to be an answer for that somewhere out there, so I hope someone can me poke into the right direction.



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