After having read the documentation and wandered through the Cisco's site I turn to this forum as the last resort.
I have a task of configuring a leased ISDN line attached to 1603 which will be accessed by a single PC connected directly to the router's Ethernet port. The ISDN switch type is not important because I use an NT-1 terminal connected to a U-interface simulator that can set/unset a loopback, activate and deactivate the link. The router has IOS version 12 which seems to be slightly different from what the S/W Config Guide is based on. In particular, the document refers to ISDN subinterfaces which are not supported by this S/W version.
I managed to configure the Ethernet port and ping the connection to the PC in both direction. Now I am stuck at the virtual template interface configuration: ping does not goes through it at all and fails on timeout.
I would appreciate if someone answers me the following questions:
- How do I choose an IP address and subnet mask for a virtual template interface that represents the ISDN line?
- What debug commands should I use and what should I watch in their printout so that to trace the overall ping path?
Thanks for your prompt reply. It gives me some directions but unfortunately does not relate exactly to my job: I am asked to establish a leased line while your answer considers the ISDN dialer interface.
Nevertheless, what you write is very interesting to me.
- if... isp give you fixed ip address a /30 should be enough.
How do I set the /30 configuration?
- you may need NAT also to translate your lan ip address to public (dialer) ip address.
Should I create the NAT in the router or it is enough to provide the appropriate routing rule in the client PC?
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...