07-29-2002 01:30 AM - edited 03-02-2019 12:14 AM
Here is my router config
Version 12.0
service timestamps debug datetime
service timestamps log datetime
no service password-encryption
service udp-small-servers
service tcp-small-servers
!
hostname remoterouter
!
aaa new-model
aaa authentication login default group tacacs+ local
aaa authentication ppp default local
aaa authorization exec default group tacacs+
aaa accounting exec default start-stop group tacacs+
aaa accounting network default start-stop group tacacs+
enable secret 5 xxxxxxxxxxxxxxxx
enable password xxxxxxxx
!
username master password 7 xxxxxxxxxxxxxx
username siterouter password 7 xxxxxxxxxxxxxx
!
!
clock timezone gmt 0
clock summer-time bst recurring last Sun Mar 2:00 last Sun Oct 2:00
ip subnet-zero
!
isdn switch-type basic-net3
isdn voice-call-failure 0
isdn tei-negotiation first-call
!
!
interface Loopback0
no ip address
no ip directed-broadcast
!
interface Ethernet0
ip address 10.28.0.1 255.255.252.0
ip helper-address 10.2.44.200
no ip directed-broadcast
keepalive 4
!
interface Serial0
description Frame-Relay Link
bandwidth 64
ip address 10.1.16.2 255.255.252.0
no ip directed-broadcast
encapsulation frame-relay
no ip route-cache
no ip mroute-cache
no fair-queue
frame-relay map ip 10.1.16.1 100 broadcast
frame-relay lmi-type ansi
!
interface Serial1
no ip address
no ip directed-broadcast
shutdown
!
interface BRI0
description dial backup link
bandwidth 56
no ip address
no ip directed-broadcast
encapsulation ppp
no ip route-cache
no ip mroute-cache
no keepalive
dialer pool-member 1
isdn switch-type basic-net3
no fair-queue
no cdp enable
!
interface Dialer0
ip address 10.2.176.10 255.255.255.0
no ip directed-broadcast
encapsulation ppp
dialer remote-name siterouter
dialer pool 1
dialer idle-timeout 90
dialer string 01xxxxxxxx
dialer-group 1
no fair-queue
no cdp enable
ppp authentication chap
ppp multilink
!
interface Dialer1
no ip address
no ip directed-broadcast
no cdp enable
!
router eigrp 1
network 10.0.0.0
network 144.98.0.0
no auto-summary
!
ip classless
no ip forward-protocol udp tftp
no ip forward-protocol udp nameserver
no ip forward-protocol udp domain
no ip forward-protocol udp time
no ip forward-protocol udp netbios-ns
no ip forward-protocol udp netbios-dgm
no ip forward-protocol udp tacacs
ip route 10.0.0.0 255.0.0.0 10.2.176.1 200
no ip http server
!
logging trap debugging
access-list 101 deny eigrp any any
access-list 101 permit ip any any
dialer-list 1 protocol ip list 101
!
tacacs-server host 10.2.44.208
tacacs-server host 10.2.44.206
tacacs-server timeout 1000
tacacs-server key cisco
snmp-server engineID local 00000009020000E01E3E7080
snmp-server community public xxxx!
line con 0
transport input none
line aux 0
password cisc0
no activation-character
modem InOut
stopbits 1
flowcontrol hardware
line vty 0 4
password xxxxxxx
!
ntp clock-period 17179532
ntp server 144.98.xx.xx
end
remoterouter#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-P-L), Version 12.0(7)T, RELEASE SOFTWARE (fc2)
Copyright (c) 1986-1999 by cisco Systems, Inc.
Compiled Mon 06-Dec-99 19:39 by phanguye
Image text-base: 0x0303C3D4, data-base: 0x00001000
ROM: System Bootstrap, Version 11.0(10c), SOFTWARE
BOOTFLASH: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0(10c), RELEASE SOF)
remoterouter uptime is 2 days, 18 hours, 35 minutes
System returned to ROM by power-on
System restarted at 15:37:54 bst Fri Jul 26 2002
System image file is "flash:c2500-p-l.120-7.T.bin"
cisco 2500 (68030) processor (revision N) with 6144K/2048K bytes of memory.
Processor board ID 06099777, with hardware revision 00000001
X.25 software, Version 3.0.0.
Basic Rate ISDN software, Version 1.1.
1 Ethernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
1 ISDN Basic Rate interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read ONLY)
Configuration register is 0x2102
I have been having problems with the bri interface being brought up for reasons i can't work out. I noticed that if i ping an ip address the bri interface stays down but if i traceroute to the same ip then the bri interface comes up:
Dial String Successes Failures Last DNIS Last status
0 incoming call(s) have been screened.
0 incoming call(s) rejected for callback.
BRI0:1 - dialer type = ISDN
Idle timer (90 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is data link layer up
Dial reason: ip (s=10.2.176.10, d=255.255.255.255)
Interface bound to profile Dialer0
Time until disconnect 80 secs
Current call connected 00:00:43
Connected to 0xxxxxxx (siterouter)
If i do a show ip route for the destination ip it shows the serial interface as i would expect:
sh ip route 10.2.44.200
Routing entry for 10.2.44.0/22
Known via "eigrp 1", distance 90, metric 40514304, type internal
Redistributing via eigrp 1
Last update from 10.1.16.1 on Serial0, 00:27:42 ago
Routing Descriptor Blocks:
* 10.1.16.1, from 10.1.16.1, 00:27:42 ago, via Serial0
Route metric is 40514304, traffic share count is 1
Total delay is 20090 microseconds, minimum bandwidth is 64 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 75/255, Hops 2
why does the router send a broadcast via the bri interface when i traceroute?
debug dialer packet shows following:
Jul 29 09:23:33: Dialer0 DDR: ip (s=10.2.176.10, d=255.255.255.255), 68 bytes, outgoing interesting (list 101)
Any further data needed then please let me know.
07-29-2002 04:07 AM
It looks like the BRI interface is brought up by the routing protocol. You can either put the BRI interface in backup state using the backup command under the appropriate serial int erface or make sure EIGRP is not enabled on that BRI interface.
07-29-2002 05:54 AM
Except for two things...
1 - EIGRP uses multicast, not broadcast, and is denied in access-list 101.
2 - Does not explain why traceroute triggers the call and ping does not (assuming original question is accurate).
I don't see anything obvious in the information provided, other than the use of 12.0(7)T IOS, which is full of bugs. This could be one of them.
Vincent C Jones
07-29-2002 07:53 AM
i'll try a newer ios as it doesn't make a lot of sense. thanks for the input.
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