I am trying to install two Serial 2T cards into a 3745 router (R3 in this diagram), all with smart cables to its neighbor. All the devices involved are in one room. One card has no problem with finding its two CDP neighor. The other, which i am trying to set as Frame-relay connections to others, connected to another 3745 that is used as Frame-relay switch.
R2==Serial port on WIC 2====R3=====Serial port on WIC 1(problematic link)==Frame Switch(3745 similated)======R1
|=====Same card ===============================|
Problem: Interface on R3 to Frame Switch is alway up/down, when configured with Frame-relay encapsulation(the same linke, when I set it as hdlc on both sides, it works fine. ). But R1 and R2 are working fine. they are same routers, cards.
Anyone can give me some hint? It seems that there is no much documents online for this.
Also, a second question, the numberation of the ports seems to be very confusion, it doesnt go with the physical slots.
Adam's advice is sound.
Here's a good link:
Are you using a frame-relay back to back DCE/DTE cable?
You need to configure clock & intf-type as dce on frame switch.
Sounds like you may have your layer 2 info configured wrong.
Can you post relevant configs from the frame switch and router in trouble?