Tech Stuff - Serial Interface Primer. A short, but generally happy. Figure 5 - Minimal 3 pin cable with crossed CTS/RTS and spoofed DCD, DTR, DSR for PC1. Serial Port Signals and Pin Assignments. Serial ports consist of two signal types. The control pins include RTS and CTS, DTR and DSR, CD, and RI. The RTS and CTS. Has anyone seen this in serial interfaces before? Link is UP and traffic is going through, however. The router is a Cisco 2811 IOS 12.4(15)T10. Router#sh int s0/1/0. Serial0/1/0 is up, line protocol is up. 0 output buffers swapped out 0 carrier transitions. DCD=up DSR=up DTR=up RTS=up *CTS=down*.

Hello, I am trying to troubleshoot an intermittent connectivity issue on a network that has a switch (older 3com unmanaged) behind a Cisco 1700-series router. The router connects this site via a P2P link to another site across town. Occasionally, voice and data goes down. This T1 Point-to-point link is their only connnection to the outside. The other site is not having issues, so I know the issue is on the router or the switch here. Renegade Angels Series Epub Gratis more. I have been looking at interface stats (show interfaces, show controllers, etc.) but not getting much useful information. Any suggestions on how to view the logs/earlier stats when the issue was happening?

It happened just a few minutes ago and then it came back up within minutes. I highly suspect it is the switch. What is the best way to determine that? Ok so I narrowed the issue down to the one interface (the T1 interface) and I ruled out any other issues with the local switches. Depending on what you suspect the issue to be, you could setup syslog (logging) to a server. Are you able to log into the router during these issues? Do you get anytypes of alerts from a monitoring tool. Ati Mobility Radeon X1300 Driver Windows 10.

If you can test from the inside you could determine if it is the switch dropping the connection, if this is the case the routers outside interface should still be up and accessible during periods of issues. The opposite would be true if it were an outside issue. End users on the inside should still be able to get up to the router or talk to other networked devices. This will help you start to isolate if its the router, the switch, a port, etc. So who is the Cisco genius that can look at the show interface stats and tell me what might be causing this? They have a T1 point-to-point link and for some reason I am seeing the available bandwidth as '78 kilobits/sec). As it's showing a lot of interface resets and LCP closed when it's not working, I would go with a cabling issue and not a config issue.