ISDN TEI=255????

[serdarkut]

hi everyone,

i have problem in my isdn conf.when i send interesting traffic on bri0, and watch it on sh isdn status i get layer1 activating and layer2 TEI=255 status:establish awaiting tei.

what cause this problem?does anyone met it before?

by the way, i am in turkey and have switch-type basic-net3. i tried isdn tei-negotiaton first-call but no change...

edfman-tr#sh isdn stat

Global ISDN Switchtype = basic-net3

ISDN BRI0 interface

dsl 0, interface ISDN Switchtype = basic-net3

Layer 1 Status:

ACTIVATING

Layer 2 Status:

TEI = 255, Ces = 1, SAPI = 0, State = ESTABLISH_AWAITING_TEI

Layer 3 Status:

0 Active Layer 3 Call(s)

CCB:callid=8065, sapi=0, ces=1, B-chan=1, calltype=DATA, hdlctype=HDLC-T

RUNK

Active dsl 0 CCBs = 1

The Free Channel Mask: 0x80000002

Number of L2 Discards = 0, L2 Session ID = 200

Total Allocated ISDN CCBs = 1

Serdar KUT

System Support Specialist&CCNA

TEKBIM LTD

[thisisshanky]

For things to work properly, your ISDN l2 status needs to reach MULTIPLE_FRAME_ESTABLISHED. And one TEI for each of your B channel should be assigned. Give a debug isdn q931 and see if you are sending as well as receiving frames to your switch. You should see messages with TX and RX in it.

Have you contacted your telco yet, to find out the appropriate switch settings ?

[serdarkut]

first of all thanks for your interest on my problem...

my telco insist on basic-net3...

now I am only able to telnet to router and I made logging monitor, but still I can get debug...I will connect on console tomorrow and if I cant solve the problem I will paste debug outputs

best regards,

[thisisshanky]

Sorry for the mistake I made in the above post. Infact to see the frames sent at L2 between the ISDN switch and your router, you got to use debug isdn q921 and not q931. That was a typo error...

[Richard Burts]

With layer 1 status of "activating" and layer 2 state of "ESTABLISH_AWAITING_TEI" I think you have not established proper communication with the ISDN switch. I would suggest debug isdn q921 to check signaling between your router and the switch.

If you post the ISDN parts of your config it might be helpful.

[serdarkut]

here is the sh run...

edfman-tr#sh run

Building configuration...

Current configuration : 1035 bytes

!

version 12.2

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname edfman-tr

!

enable secret xxxxx

enable password xxxxxxxx

!

username edfdb password 0 xxxxxxxxxxx

ip subnet-zero

!

isdn switch-type basic-net3

!

!

!

interface Loopback0

ip address 193.xxx.xxx.175 255.255.255.255

!

interface BRI0

ip unnumbered Loopback0

encapsulation ppp

dialer string 08222111206

dialer-group 1

isdn switch-type basic-net3

isdn tei-negotiation first-call

ppp authentication pap

!

interface FastEthernet0

ip address 193.xxx.xxx.206 255.255.255.248

speed auto

half-duplex

!

interface Serial0

ip address 212.xxx.xxx.194 255.255.255.252

no fair-queue

!

ip classless

ip route 0.0.0.0 0.0.0.0 212.xxx.xxx.193

ip route 0.0.0.0 0.0.0.0 BRI0 10

ip route 160.xxx.xxx.225 255.255.255.255 BRI0

no ip http server

!

!

dialer-list 1 protocol ip permit

dialer-list 1 protocol ipx permit

!

line con 0

line aux 0

line vty 0 4

exec-timeout 600 0

password xxxxxxxx

login

!

end

problem still exists... :(

[b-ulrich]

Hi,

Try resetting the interface by typing 'clear int bri0' But it appears that it is a Teleco issue. Try different switch types and removing the 'isdn tei-negotiation first-call' command.

[rgodden]

do a debug of isdn at layer2, do you see a broadcast tei of 127 ?, then then switch should return a tei of between 64-126 depending on telco switch