I have 2 routers, a 3640 with a t1 interface and a 2524 with a t1 interface. I made a back to back cable so that I could try to configure a test connection between the 2 routers. When I get them all turned on and configured I see the interfaces registered as Up/Down and I see alot of interface resets. Attached are the 2 configs... any ideas would be greatly appreciated.
A T1 crossover cable should be a UTP / Cat5(5e, 6) with pins 1&2 --> 4&5 on each end.
Make sure the cable is terminated properly and done well; een though the data rate is significantly less than Fast Ethernet, the signaling scheme for serial is sensitive to cable quality.
If you're talking about something like a 60pin --> 60 pin back-to-back cable, make sure you have the DCE end going to the router with the DCE role (and DTE to the DTE-side router). There (should be) are labels on each end of the cable to identify which end is which.
You can also do a "sh controllers" which should tell you what the router thinks the cable is.
Off the 2524 router I see no framing and coding. if it is default it may not show it, however just need to ask if it was set for ESF/B8ZS. Also I see the clocking is set for Internal on one rouer and the other should be set for external timing. Again it may be default and may not be shown on the config. Also a show controllers will show any layer 1 errors (Red alarm, Yellow Alarm, etc...) Maybe your T-1 crossover cable is faulty...Just some items to check....
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
Q1: What are all the channel operational states from a BR (border role) perspective and what are the rules/conditions to be in each st...
The need was to reach an host inside a LAN through a VPN connection managed by the LAN gateway (Cisco 1921).
The LAN gateway performs NAT and there was a dedicate nat rule for the host i wanted to reach through VPN.
I couldn't connect to the hos...
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...