Hello Community Members,
I've just recently run accross my config and noticed I have an Internal Control and Internal Data interfaces in my Cisco ASA 5516-x.
Internal-Control1/1 127.0.1.1 YES unset up up
Internal-Data1/1 unassigned YES unset down down
Internal-Data1/2 unassigned YES unset up up
Internal-Data1/3 unassigned YES unset up up
Internal-Data1/4 169.254.1.1 YES unset up up
I didn't setup them for a purpose, moreover they are not visible in ASDM or in CLI "show interface", "show run interface" commands. I just noticed them via running "show interface ip brief" command in CLI. What are they for? Why they appeared?
I have setup two SLA monitors for checking ISP connectivity, however I've attached this SLAs to outside interfaces. Need to note that device is not connected to any of ports exept the inside LAN through which I've connecting over ssh to make configuration and used only as a testing device.
It is also sends me some logs with errors like:
Severity | Date | Time | SyslogID | Source IP | Source port | Destination Ip | Destination Port | Description |
6 | Mar 20 2019 | 11:42:14 | 110002 | 169.254.185.218 | 137 | | | Failed to locate egress interface for UDP from LAN1-HO-ge1:169.254.185.218/137 to 169.254.255.255/137 |
Hope to hear from you,
Regards Olim