I've seen the other replies to you post, and I'll give you a few other pieces of input. By the way, you really didn't give us any indication of what you saw as the output from the router - I'll just assume that you saw nothing.
1. From the configuration, it is not obvious what kind of ISDN switch you're using. Do you know if you need to add a statement to define the switch type? (I'd guess yes, unless the rules changed in 12.2) 2. Someone else indicated that you need to check the ISDN status using the appropriate show command. You'll learn something from doing that check. Mostly, you'll learn how to read the status of the ISDN circuit, and what the different fields indicate on the results of the show isdn status command. Learning the debug commands (debug isdn q921, debug isdn q931) are also valuable tools. Learn to use them to diagnose a problem. 3. Look at the purpose of the dialer map statement. Someone else indicated that you need to configure a destination phone number for that. I agree with that indication. Paris doesn't know what number to dial to reach New_York_City. 4. Someone suggested using backup-interface. I'd counsel you NOT to go down that road until you have the point-to-point ISDN configuration stable and it's coming up when you want it to. 5. Another person suggested that you add an administrative distance to your static route. That would be a good idea. When you do that, your ISDN circuit will come up only when the route for the serial link goes away (assuming that it's the only route to the other router) 6. Some switches prefer/require that you suffix the dialing numbers to the SPID assignments. Learn which switches need that kind of input. 7. What other resources have you used to learn configuration of ISDN? There are different layers of ISDN configuration. They are, in order of bottom to top: a. the ISDN physical connection itself (S/T interfaces require NT-1's or a simulator that has an S/T interface, U interfaces have a built-in NT-1) Cisco 2500 series routers (except the 2524/2525) have an S/T interface. The 2524/2525 has two flavors of modular BRI, S/T or U. Cisco 4000 series NP-4B and NP-8B have S/T interfaces. I'm not sure about the 26/3600 series, but I'm sure someone else on the list does know and might be willing to share that info. b. ISDN interface establishing communication with the ISDN switch (q921 signalling - requires the correct ISDN switch type configured and the proper physical connection) c. ISDN interface obtaining TEI (q931 signalling-requires the ISDN SPIDs configured properly) d. triggering the interface to dial (either IP or backup-interface or snapshot routing, requires the dialer-map and dialer-lists configured properly) e. encapsulation negotiation (ppp-requires both routers have a common encapsulation) f. authentication (chap-requires username/passwords used in the dialer-map statements match on both routers) g. IP routing (static or dynamic routes) over the interface (requires routing protocol including static to route to the correct destinations via the BRI interfaces). h. establishing multilink (requires the dialer-load statement) 8. Extraneous commands in a BRI configuration sometimes spell disaster, so take out anything that you don't absolutely need from a basic's perspective. Otherwise, your configuration is a good start. Unfortuately, incomplete BRI configurations don't work, and don't give you any indication of why they don't work. I'll refer you to a very valuable resource, which I still use when I get stuck on an ISDN configuration. It's Cisco's TAC page for ISDN Technology: http://www.cisco.com/pcgi-bin/Support/PSP/psp_view.pl?p=Internetworking:ISDN (watch the URL wrap) Here's a page with a very basic configuration that you can learn from, step by step: http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/dial ts_c/dtsprt3/dcdbri.htm (watch the URL wrap) ISDN is a very complex configuration until you've mastered the basics, which means understanding the different layers of BRI configuration. I'd suggest that you study these pages, and then if it still doesn't work, c'mon back and post the configurations from both routers and the results of some of the show commands that you'll learn from reading the basic's pages. Good luck in your studies, and let us know what you learn about ISDN. -e- ----- Original Message ----- From: "nettable_walker" To: Sent: Friday, November 02, 2001 5:27 PM Subject: ISDN backup will not activate [7:25129] > 11/2/2001 4:30pm Friday > > Professional's, I would like to get traffic from Paris to use ISDN when the > primary link goes done. > When the serial link goes down the ISDN never comes up. I even added a > static route to send ALL traffic from the ethernet to the BRI and the BRI is > not coming up! I did a clear ip route * to no avail. > > Any ideas ? I am sure it is a "simple" detail. > > Config follows: > > > > Paris#sho run > Building configuration... > > Current configuration : 1457 bytes > ! > version 12.2 > no service single-slot-reload-enable > service timestamps debug uptime > service timestamps log uptime > no service password-encryption > ! > hostname Paris > ! > logging rate-limit console 10 except errors > aaa new-model > aaa authentication login default local > aaa authentication login NO_AUTHEN none > aaa authentication ppp default if-needed local > enable password cisco > ! > username New_York_City password 0 cisco > username richard password 0 cisco > username kaiser password 0 cisco > ip subnet-zero > no ip finger > ! > no ip dhcp-client network-discovery > ! > ! > ! > ! > interface Ethernet0 > description line to ftp server > ip address 10.0.0.1 255.0.0.0 > ! > interface Serial0 > description line to 2522_router > ip address 170.17.1.2 255.255.0.0 > no fair-queue > ! > interface Serial1 > no ip address > shutdown > ! > interface BRI0 > ip address 172.20.10.1 255.255.255.0 > encapsulation ppp > dialer idle-timeout 900 > dialer map ip 172.20.10.2 name New_York_City broadcast > dialer-group 1 > isdn spid1 1111 > isdn spid2 1111 > isdn x25 static-tei 0 > cdapi buffers regular 0 > cdapi buffers raw 0 > cdapi buffers large 0 > ppp authentication chap > ppp multilink > ! > router eigrp 100 > network 10.0.0.0 > network 170.17.0.0 > auto-summary > no eigrp log-neighbor-changes > ! > ip kerberos source-interface any > ip classless > ip route 10.0.0.0 255.255.255.255 BRI0 > ip http server > ! > dialer-list 1 protocol ip permit > ! > ! > line con 0 > transport input none > line aux 0 > line vty 0 1 > password cisco > line vty 2 4 > ! > end > > Paris# _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=25156&t=25129 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
