Problem with ISDN on c2600. - Page 2

Konstantin Dunaev · ‎02-14-2012

Hello,

I see a very strange problem with our ISDN slot on c2600 and can't somehow explain it.

If I connect a normal ISDN phone the line is working perfectly but if I connect ISDN port on our router then ISDN status shows:

#sh isdn status

Global ISDN Switchtype = basic-net3

ISDN BRI1/0 interface

dsl 0, interface ISDN Switchtype = basic-net3

Layer 1 Status:

DEACTIVATED

Layer 2 Status:

Layer 2 NOT Activated

Layer 3 Status:

0 Active Layer 3 Call(s)

Active dsl 0 CCBs = 0

The Free Channel Mask: 0x80000003

Total Allocated ISDN CCBs = 0

and I can't start a connection, I've tried with help of "isdn test call", it shows an error like "no B chanel available"

If I make an incoming call to the telephone number of that ISDN line then the status of the line changes to "MULTIPLE_FRAME_ESTABLISHED" and I can use the line just normal for Dialer connections.

After some period of time (sometime is hours, sometimes is only a minutes) the Line status goes again to "DEACTIVATED" and Dialer connection doen't work until I place an incoming call.

The ISDN Hardware is:

BRI S/T - 2186 WAN daughter card

Hardware revision 1.3 Board revision A0

Serial number 19923810 Part number 800-01833-03

FRU Part Number WIC-1B-S/T=

BRI configuration:

interface BRI1/0

description isdn-backup

no ip address

encapsulation ppp

dialer pool-member 3

isdn switch-type basic-net3

isdn point-to-point-setup

isdn outgoing display-ie

no cdp enable

router version is 2600-advipservicesk9-mz.124-2.T.bin

I can see the same problem on two different locations, where we use this type of hardware.

Please give some advise. may there is a kind of "keepalive" for BRI interfaces?

jefffisher · ‎03-15-2012

Here is an old config from when I did a lot of ISDN work. It is on a 2600 series router. Never had any issues. I used 800 series routers to connect back to the 2600.

!

! Last configuration change at 09:24:49 cst Tue Dec 4 2001

! NVRAM config last updated at 09:24:51 cst Tue Dec 4 2001

!

version 11.2

service timestamps debug uptime

service timestamps log datetime msec localtime show-timezone

no service password-encryption

no service udp-small-servers

no service tcp-small-servers

!

hostname sci-aus

!

ip subnet-zero

ip name-server 172.16.20.20

isdn switch-type basic-ni1

clock timezone cst -6

clock summer-time cdt recurring

!

interface Ethernet0

ip address 207.200.40.193 255.255.255.224

!

interface Ethernet1

ip address 172.16.20.2 255.255.255.128

!

interface Virtual-Template1

no ip address

no ip mroute-cache

!

interface Serial0

description To ONR

ip address 207.200.54.6 255.255.255.252

!

interface Serial1

no ip address

shutdown

!

interface BRI0

description To Manchaca Village Vet

no ip address

encapsulation ppp

no ip mroute-cache

bandwidth 64

isdn spid1 51291611180101 9161118

isdn spid2 51291611190101 6161119

dialer rotary-group 0

no fair-queue

compress stac

no cdp enable

!

interface BRI1

no ip address

shutdown

!

interface BRI2

no ip address

shutdown

!

interface BRI3

no ip address

shutdown

!

interface Dialer0

ip address 172.16.20.237 255.255.255.252

encapsulation ppp

no ip mroute-cache

dialer in-band

dialer idle-timeout 900

dialer hold-queue 10

dialer load-threshold 2 either

dialer-group 1

no fair-queue

compress stac

no cdp enable

ppp negotiation-timeout 300

ppp authentication chap

ppp chap hostname sci-vet

ppp chap password 7 010213054802565E

ppp multilink

!

router rip

version 2

redistribute connected

network 172.16.0.0

network 207.200.40.0

!

ip classless

ip route 0.0.0.0 0.0.0.0 207.200.54.5

dialer-list 1 protocol ip permit

!

line con 0

line aux 0

line vty 0 4

login

!

end