09-02-2008 05:03 AM
Hi,
I have ISDN BRI line that keeps getting up in regulary intervals (every hour). It is not initiated by interesting traffic (I configured deny any any in access list). Does anybody knows how to fix this?
This is config:
interface BRI0/3/0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
isdn point-to-point-setup
isdn static-tei 0
no cdp enable
ppp authentication chap
!
interface Dialer1
ip unnumbered Loopback0
encapsulation ppp
dialer pool 1
dialer idle-timeout 600 either
dialer enable-timeout 1
dialer string xxxxxxxx
dialer load-threshold 200 either
dialer-group 1
no cdp enable
ppp authentication chap
ppp multilink
!
access-list 150 deny ip any any
dialer-list 1 protocol ip list 150
This is debug output (debug isdn q931, error and debug dialer packets, events :
*Sep 2 14:23:37.912: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/3/0, TEI 0 changed to up
*Sep 2 14:23:38.456: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/3/0, TEI 0 changed to down
*Sep 2 14:23:38.456: ISDN BR0/3/0 Q931: L3_ShutDown: Shutting down ISDN Layer 3
*Sep 2 15:26:14.500: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/3/0, TEI 0 changed to up
*Sep 2 15:26:15.045: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/3/0, TEI 0 changed to down
*Sep 2 15:26:15.045: ISDN BR0/3/0 Q931: L3_ShutDown: Shutting down ISDN Layer 3
Thanks,
A
Solved! Go to Solution.
09-03-2008 09:10 AM
Antonio
I have not seen this command used very much:
isdn static-tei 0
can you tell us why you need it here?
If you remove that line does the behavior change?
HTH
Rick
09-02-2008 09:22 AM
Hi
Can you remove the command isdn point-to-point from the isdn bri interface and check.
You can make use of no isdn point-to-point command to achieve the same.
regds
09-03-2008 04:10 AM
Hi,
I removed isdn point-to-point from the interface configuration but Interface still goes up and down every hour
*Sep 3 11:15:50.765: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/3/0, TEI 0 changed to up
*Sep 3 11:15:51.310: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/3/0, TEI 0 changed to down
*Sep 3 11:15:51.310: ISDN BR0/3/0 Q931: L3_ShutDown: Shutting down ISDN Layer 3
*Sep 3 12:18:27.402: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/3/0, TEI 0 changed to up
*Sep 3 12:18:27.947: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/3/0, TEI 0 changed to down
*Sep 3 12:18:27.951: ISDN BR0/3/0 Q931: L3_ShutDown: Shutting down ISDN Layer 3
*Sep 3 13:21:04.059: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/3/0, TEI 0 changed to up
*Sep 3 13:21:04.608: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/3/0, TEI 0 changed to down
*Sep 3 13:21:04.608: ISDN BR0/3/0 Q931: L3_ShutDown: Shutting down ISDN Layer 3
*Sep 3 14:23:40.664: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/3/0, TEI 0 changed to up
*Sep 3 14:23:41.205: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/3/0, TEI 0 changed to down
*Sep 3 14:23:41.205: ISDN BR0/3/0 Q931: L3_ShutDown: Shutting down ISDN Layer 3
09-03-2008 04:52 AM
Hi
can you post the full configuration of your router and also can u try doing isdn debug q921/q931 and paste the output.
Try q921 or q931 in a single instance and capture the output.
regds
09-03-2008 06:16 AM
Hi, Here is the debug output (q921 and 1931)
ep 3 15:59:14.269: ISDN BR0/3/0 Q921: L2_EstablishDataLink: sending SABME
Sep 3 15:59:14.269: ISDN BR0/3/0 Q921: User TX -> SABMEp sapi=0 tei=0
Sep 3 15:59:14.297: ISDN BR0/3/0 Q921: User RX <- UAf sapi=0 tei=0
Sep 3 15:59:14.297: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/3/0, TEI 0 changed to up
Sep 3 15:59:14.838: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/3/0, TEI 0 changed to down
Sep 3 15:59:14.842: ISDN BR0/3/0 Q931: L3_ShutDown: Shutting down ISDN Layer 3
And here is whole configuration:
version 12.4
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime
service timestamps log datetime msec localtime
service password-encryption
!
hostname xxxxx
!
boot-start-marker
boot-end-marker
!
no aaa new-model
!
clock timezone CET 1
clock summer-time CET-SUMMER recurring last Sun Mar 2:00 last Sun Oct 3:00
!
!
ip cef
!
!
no ip domain lookup
ip host router1 2015 10.0.1.0
ip host router2 2017 10.0.1.0
ip host router3 2005 10.0.1.0
!
isdn switch-type basic-net3
!
username user01 password 7 047C05075E2FdD4f01
!
interface Loopback0
ip address 10.0.1.0 255.255.255.255
!
interface FastEthernet0/0
ip address 10.20.4.196 255.255.255.224
duplex auto
speed auto
!
interface FastEthernet0/1
shutdown
!
interface BRI0/3/0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
isdn static-tei 0
no cdp enable
ppp authentication chap
!
interface Async0/0/0
no ip address
encapsulation slip
!
interface Async0/0/1
no ip address
encapsulation slip
!
interface Async0/0/2
no ip address
encapsulation slip
!
interface Async0/0/3
no ip address
encapsulation slip
!
interface Async0/0/4
no ip address
encapsulation slip
!
interface Async0/0/5
no ip address
encapsulation slip
!
interface Async0/0/6
no ip address
encapsulation slip
!
interface Async0/0/7
no ip address
encapsulation slip
!
interface Async0/0/8
no ip address
encapsulation slip
!
interface Dialer1
ip unnumbered Loopback0
encapsulation ppp
dialer pool 1
dialer idle-timeout 600 either
dialer enable-timeout 1
dialer string xxxxxxxx
dialer load-threshold 200 either
dialer-group 1
no cdp enable
ppp authentication chap
ppp multilink
!
interface Dialer2
ip unnumbered Loopback0
encapsulation ppp
dialer pool 1
dialer idle-timeout 600 either
dialer enable-timeout 1
dialer string xxxxxxxxx
dialer load-threshold 200 either
dialer-group 1
no cdp enable
ppp authentication chap
ppp multilink
!
interface Dialer3
ip unnumbered Loopback0
encapsulation ppp
dialer pool 1
dialer idle-timeout 600 either
dialer enable-timeout 1
dialer string xxxxxxxx
dialer load-threshold 200 either
dialer-group 1
no cdp enable
ppp authentication chap
ppp multilink
!
router eigrp 1
passive-interface default
network 10.0.1.0 0.0.0.0
network 10.20.4.192 0.0.0.31
no auto-summary
!
ip route 0.0.0.0 0.0.0.0 10.20.4.217 200
ip route 10.0.1.6 255.255.255.255 Dialer1
ip route 10.0.1.8 255.255.255.255 Dialer2
ip route 10.0.1.11 255.255.255.255 Dialer3
!
no ip http server
!
access-list 150 permit tcp any 10.0.1.0 0.0.0.255
access-list 150 permit icmp any 10.0.1.0 0.0.0.255
dialer-list 1 protocol ip list 150
!
control-plane
!
!
line con 0
login local
line aux 0
line 0/0/0 0/0/15
session-timeout 20
exec-timeout 0 0
no exec
transport input all
transport output all
stopbits 1
line vty 0 4
session-timeout 10
exec-timeout 60 0
password 7 04560E221DfE
login local
transport input all
!
scheduler allocate 20000 1000
ntp clock-period 17208329
ntp source FastEthernet0/0
ntp server 10.20.4.217
!
end
regards,
09-03-2008 09:10 AM
Antonio
I have not seen this command used very much:
isdn static-tei 0
can you tell us why you need it here?
If you remove that line does the behavior change?
HTH
Rick
09-04-2008 06:45 AM
Hi Rick,
I removed static TEI and it seems that interface doesn't go up anymore.
I put it in a configuration because it was recommended by the Telco for their type of ISDN switch.
Thanks,
A
09-04-2008 08:47 AM
Antonio
I am glad that you got your problem resolved. It is a bit odd that the telco would recommend this command and then it turns out that it creates a problem for you.
Thank you for using the rating system to indicate that your problem was resolved (and thanks for the rating). It makes the forum more useful when people can read a problem and can know that a response was successful in resolving the problem.
The forum is an excellent place to learn about Cisco networking. I encourage you to continue your participation in the forum.
HTH
Rick
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