Learning by Doing: CISCO Certified Network ... - SCN Research

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:.....
Success rate is 0 percent (0/5)
Aha! No PPP is being negotiated at all. We would expect some problem with PPP not
being on the routers at all. Since we have several hints we just need to go back and
double-check very closely our configurations for our layer 2 commands:
router(config-if)dialer map ip 192.168.1.2 name routerB 5552000 (2)
router(config-if)isdn spid1 51055512340001 5551234 (2)
router(config-if)isdn spid2 51055512350001 5551235 (2)
router(config-if)#enc ppp (2)
router(config-if)#ppp authentication chap (2)
router(config)#username joe password cisco (2)
router(config)#ip host joe 192.168.1.1 (2)
To fix this we just add in the dialer map statement.
Incorrect dialer list (layer 2):
For this I just changed the dialer map statement from so the number called would be
incorrect (actually to itself). You will have the same outputs as if you did not even have
a map.
Incorrect spid (layer 2/3):
If you have more than one spid then you will have to change them all. The other spids
are secondary and will be used in case the primary spid does not work. This one is easy
to spot…the spid gets rejected.
kissane#ping 192.168.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:.....
Success rate is 0 percent (0/5)
06:00:43: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/0, TEI 64 changed
to up
06:00:43: %ISDN-4-INVALID_SPID: Interface BR0/0, Spid1 was rejected
kissane#
Just for sake of continuity let’s check our isdn status too.
kissane#sh isdn status
Global ISDN Switchtype = basic-ni
ISDN BRI0/0 interface
dsl 0, interface ISDN Switchtype = basic-ni
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 64,Ces = 1,SAPI = 0,State =MULTIPLE_FRAME_ESTABLISHED
437