Hello,
I have very strange problem.
Two routers (client and access-server) are connected via
E1/PRI (using Siemens ISDN switch).
When I simulate short disconnect (several miliseconds) in
access server part and switch doesn't recognize any failure
strange thing occurs. Router recognizes E1 controller down,
all established channels go down and E1 controller goes up.
Everything seems OK, but no traffic go throug this
connection (encapsulation failed in both routers debugs).
When I simulate problem in other side or ISDN switch
recognizes failure, everything is OK.
From my investigating it seems that the problems is
connected with Balanced module (2CE1B). Module 1FE-2CE-B/U
in unbalanced mode hasn't this problem. However I haven't
both unbalanced modules yet, so I can properly try it.
As for the IOSes, I try a lot of version (12.0.x, 12.0.xT,
12.1.xT etc). The problem is the same.
Is there any possibility, how to prolong down state of E1
controller in situation when it go down? I hope it should
help to recognize failure for ISDN switch.
Thank you any hint.
Michal
Configuration and sh ver of one router (access-server):
gcra#sh run
Building configuration...
Current configuration:
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname gcra
!
no logging console
!
username password 0
username password 0
username service password 0 service
ip subnet-zero
no ip domain-lookup
ip address-pool local
isdn switch-type primary-net5
!
!
controller E1 0/0
pri-group timeslots 1-31
!
controller E1 0/1
!
!
interface Loopback0
no ip address
no ip directed-broadcast
!
interface Loopback1
ip address 192.168.101.2 255.255.255.0
no ip directed-broadcast
!
interface Serial0/0:15
no ip address
no ip directed-broadcast
encapsulation ppp
dialer pool-member 1
isdn switch-type primary-net5
isdn bchan-number-order ascending
ppp authentication chap
ppp multilink
!
interface Ethernet1/0
ip address 192.168.51.2 255.255.255.0
no ip directed-broadcast
no ip mroute-cache
!
interface Serial1/0
no ip address
no ip directed-broadcast
shutdown
!
interface Ethernet1/1
no ip address
no ip directed-broadcast
!
interface Dialer1
description GCRA Generalni reditelstvi CRa, komut.
ip unnumbered loopback 1
no ip directed-broadcast
encapsulation ppp
dialer remote-name stra
dialer idle-timeout 2147483
dialer load-threshold 1 either
dialer max-call 30
dialer pool 1
dialer-group 1
ppp authentication chap
ppp multilink
!
ip classless
ip route 193.86.0.0 255.255.255.0 Dialer1
!
!
map-class dialer trida1
dialer idle-timeout 2147483
dialer-list 1 protocol ip permit
!
line con 0
transport input none
line aux 0
line vty 0 4
login
!
end
gcra#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 3600 Software (C3640-I-M), Version 12.0(9), RELEASE
SOFTWARE (fc1)
Copyright (c) 1986-2000 by cisco Systems, Inc.
Compiled Wed 26-Jan-00 18:23 by bettyl
Image text-base: 0x60008918, data-base: 0x6068
ROM: System Bootstrap, Version 11.1(19)AA, EARLY DEPLOYMENT
RELEASE SOFTWARE (fc1)
gcra uptime is 2 hours, 37 minutes
System restarted by power-on
System image file is flash:c3640-i-mz.120-9.bin
cisco 3640 (R4700) processor (revision 0x00) with
36864K/12288K bytes of memory.
Processor board ID 03080885
R4700 processor, Implementation 33, Revision 1.0
Channelized E1, Version 1.0.
Bridging software.
X.25 software, Version 3.0.0.
Primary Rate ISDN software, Version 1.1.
2 Ethernet/IEEE 802.3 interface(s)
32 Serial network interface(s)
2 Channelized E1/PRI port(s)
DRAM configuration is 64 bits wide with parity disabled.
125K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102
gcra#
Configuration and sh ver of second router (client)
stra#sh run
Building configuration...
Current configuration : 1249 bytes
!
version 12.1
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname stra
!
no logging console
!
username password 0
!
!
!
!
ip subnet-zero
no ip finger
!
isdn switch-type primary-net5
!
!
controller E1 0/0
!
controller E1 1/0
pri-group timeslots 1-31
!
controller E1 1/1
!
!
interface FastEthernet1/0
ip address 193.86.0.241 255.255.255.0
duplex auto
speed auto
!
interface Serial1/0:15
description Gen. reditelstvi prvnich 30xB
no ip address
encapsulation ppp
ip mroute-cache
dialer pool-member 12
isdn switch-type primary-net5
isdn guard-timer 3000
isdn bchan-number-order ascending
fair-queue
ppp authentication chap
ppp multilink
!
interface Dialer12
description GCRA Generalni reditelstvi
ip address negotiated
encapsulation ppp
dialer pool 12
dialer remote-name gcra
dialer idle-timeout 2147483
dialer string 1587 class trida1
dialer load-threshold 1 either
dialer-group 1
!
ip classless
ip route 192.168.51.0 255.255.255.0 Dialer12
ip route 192.168.101.0 255.255.255.0
