Issue on configuring ISDN

[eigrpy]

Hi Two routers are connected with T1 0/1/1 port through RJ48 cable. The configuration in the two routers is same. but the output of show isdn status is abnormal. Do you think if something is wrong? Please see below relevant configuration:

network-clock-participate wic 1
network-clock-select 1 T1 0/1/0
network-clock-select 2 T1 0/1/1

isdn switch-type primary-ni

controller T1 0/1/1
framing esf
Ilinecode b8zs
pri-group timeslots 1-4,24

interface Serial0/1/1:23
no ip address
encapsulation hdlc
isdn switch-type primary-ni
isdn incoming-voice voice
no cdp enable

R2#sh isdn status
Global ISDN Switchtype = primary-ni
ISDN Serial0/1/1:23 interface
dsl 1, interface ISDN Switchtype = primary-ni
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 0, Ces = 1, SAPI = 0, State = TEI_ASSIGNED
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 1 CCBs = 0
The Free Channel Mask: 0x8000000F
Number of L2 Discards = 0, L2 Session ID = 240
Total Allocated ISDN CCBs = 0

[Philip D'Ath]

TEI_ASSIGNED is a good state!  What is the other one reporting?

[eigrpy]

Thank you for your reply. How do you think about this one? 

State = MULTIPLE_FRAME_ESTABLISHED

Documents state that this one should be good

[Philip D'Ath]

That is also a good state.  So the link itself is not working between the two routers?

[Richard Burts]

I wonder about the configuration of the serial interface using encapsulation hdlc. I have never seen ISDN use hdlc encapsulation.

I also would like the original poster to clarify how the routers are connected. He tells us that the routers are connected using RJ48 cable. But it is not clear if these routers are connected just back to back, or whether there is something between the routers to emulate the ISDN switch.

HTH

Rick

[Richard Bradfield · Accepted solution]

if they are connected directly one of the routers must be setup to emulate the network side

interface Serial0/1/1:23

isdn protocol-emulate network

see enclosed link

http://www.cisco.com/c/en/us/td/docs/ios/dial/configuration/guide/12_4/dia_12_4_book/dia_cfg_ntwk_isdn_pri.html#wp1081196

[eigrpy]

Richard, Thank you so much for your comment. You are right. After adding the command, it is up.