From: Gerry Hilton (gerry.hilton@rogers.com)
Date: Tue Mar 04 2003 - 15:22:25 GMT-3
Hi. I know this issue has been raised before as I searched the
archives. However, I did not find a solution that solves the problem
that I am seeing.
The problem is that the BRI interface will not drop after the primary
interface goes back up, as it thinks that the primary is still down (as
indicated by debug dialer). I believe this has to do with the way that
the routing table changes after the primary interface is shut down.
Instead of showing as via OSPF or EIGRP, it shows as directley
connected to BRI0. Bringing the primary interface up again doesn't
change this. The only way to fix this is to shut down BRI0, which
causes the routing table to change and then dialer debug shows the
primary as up again.
The version on each router is Version 12.1(17)
.
Thanks for any help,
Gerry
Details and config follow:
The route being watched is 15.5.5.5. It has the appropriate map
statement under BRI0. The primary is S0.
router4-1750-1#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is 14.70.0.7 to network 0.0.0.0
14.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 14.30.0.4/32 is directly connected, Loopback0
C 14.40.0.0/24 is directly connected, BRI0
O 14.37.0.7/32 [110/2] via 14.70.0.7, 00:02:01, Serial0
C 14.70.0.0/24 is directly connected, Serial0
15.0.0.0/32 is subnetted, 1 subnets
O 15.5.5.5 [110/2] via 14.70.0.7, 00:02:01, Serial0
O*E2 0.0.0.0/0 [110/1] via 14.70.0.7, 00:02:01, Serial0
Once S0 is shut down, the routing table changes and remains in this
state even when S0 is brought back up:
router4-1750-1#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
14.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 14.30.0.4/32 is directly connected, Loopback0
C 14.40.0.0/24 is directly connected, BRI0
15.0.0.0/32 is subnetted, 1 subnets
C 15.5.5.5 is directly connected, BRI0
router4-1750-1#
debug dialer event and debug dialer packet shows the primary as down
even when S0 is brought up:
router4-1750-1#
*Mar 2 05:40:44: %OSPF-5-ADJCHG: Process 1, Nbr 14.37.0.7 on Serial0
from LOADING to FULL, Loading Done
router4-1750-1#
1d05h: BR0:1 DDR: idle timeout
1d05h: DDR: Dialer Watch: watch-group = 8
1d05h: DDR: network 15.5.5.5/255.255.255.255 UP,
1d05h: DDR: primary DOWN
router4-1750-1#
1d05h: BR0 DDR: ip (s=14.40.0.4, d=224.0.0.5), 64 bytes, outgoing
uninteresting (list 101)
1d05h: BR0 DDR: sending broadcast to ip 15.5.5.5
1d05h: BR0 DDR: sending broadcast to ip 14.40.0.7 -- succeeded
router4-1750-1#
1d05h: BR0:1 DDR: idle timeout
1d05h: DDR: Dialer Watch: watch-group = 8
1d05h: DDR: network 15.5.5.5/255.255.255.255 UP,
1d05h: DDR: primary DOWN
router4-1750-1#
1d05h: BR0 DDR: ip (s=14.40.0.4, d=224.0.0.5), 64 bytes, outgoing
uninteresting (list 101)
1d05h: BR0 DDR: sending broadcast to ip 15.5.5.5
1d05h: BR0 DDR: sending broadcast to ip 14.40.0.7 -- succeeded
router4-1750-1#
Manually shutting down BRI0 results in the primary (S0) being shown as
up, although it was already:
1d05h: BR0:1 DDR: disconnecting call
1d05h: DDR: Dialer Watch: watch-group = 8
1d05h: DDR: network 15.5.5.5/255.255.255.255 UP,
1d05h: DDR: primary UP
*Mar 2 05:41:30: %LINK-3-UPDOWN: Interface BRI0:2, changed state to down
1d05h: BR0:2 DDR: disconnecting call
1d05h: DDR: Dialer Watch: watch-group = 8
1d05h: DDR: network 15.5.5.5/255.255.255.255 UP,
1d05h: DDR: primary UP
*Mar 2 05:41:31: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:1, changed state to down
Configs:
Calling router:
router4-1750-1#sh ver
Cisco Internetwork Operating System Software
IOS (tm) C1700 Software (C1700-BNO3R2SV3Y56I-M), Version 12.1(17),
RELEASE SOFTWARE (fc1)
router4-1750-1#sh ru
Building configuration...
Current configuration : 1722 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log datetime
no service password-encryption
!
hostname router4-1750-1
!
logging buffered 10000 debugging
!
username zz privilege 15 nopassword
username router7-1750-2 password 0 ipexpert
!
!
!
!
memory-size iomem 25
ip subnet-zero
no ip domain-lookup
!
ip audit notify log
ip audit po max-events 100
ip multicast-routing
isdn switch-type basic-ni
!
!
!
!
voice-port 2/0
!
voice-port 2/1
!
!
!
!
interface Loopback0
ip address 14.30.0.4 255.255.255.255
ip ospf network point-to-point
!
interface Loopback1
no ip address
!
interface Serial0
ip address 14.70.0.4 255.255.255.0
clockrate 148000
!
interface BRI0
ip address 14.40.0.4 255.255.255.0
encapsulation ppp
dialer idle-timeout 10
dialer watch-disable 2
dialer map ip 15.5.5.5 name router7-1750-2 broadcast 8358662
dialer map ip 14.40.0.7 name router7-1750-2 broadcast 8358662
dialer watch-group 8
dialer-group 1
isdn switch-type basic-ni
isdn spid1 0835866101
isdn spid2 0835866301
!
interface FastEthernet0
no ip address
speed auto
!
router ospf 1
log-adjacency-changes
network 14.30.0.3 0.0.0.0 area 0
network 14.40.0.0 0.0.0.255 area 0
network 14.70.0.0 0.0.0.255 area 0
maximum-paths 6
!
ip classless
no ip http server
!
access-list 101 deny ospf any any
access-list 101 permit ip any any
dialer watch-list 8 ip 15.5.5.5 255.255.255.255
dialer watch-list 1 ip 14.37.0.7 255.255.255.255
dialer-list 1 protocol ip list 101
alias exec c conf t
alias exec rb show run | begin
alias exec ri show run | include
!
line con 0
exec-timeout 120 0
logging synchronous
login local
line aux 0
line vty 0 4
exec-timeout 120 0
login local
!
end
Called router:
router7-1750-2#sh ver
Cisco Internetwork Operating System Software
IOS (tm) C1700 Software (C1700-BNO3R2SV3Y56I-M), Version 12.1(17),
RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2002 by cisco Systems, Inc.
router7-1750-2#sh ru
Building configuration...
Current configuration : 1794 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname router7-1750-2
!
!
username zz privilege 15 nopassword
username router4-1750-1 password 0 ipexpert
!
!
!
!
memory-size iomem 25
ip subnet-zero
no ip domain-lookup
!
ip audit notify log
ip audit po max-events 100
ip multicast-routing
isdn switch-type basic-ni
!
!
!
!
voice-port 2/0
!
voice-port 2/1
!
!
!
!
interface Loopback0
ip address 14.37.0.7 255.255.255.255
ip ospf network point-to-point
!
interface Loopback1
no ip address
!
interface Loopback2
ip address 15.5.5.5 255.255.255.255
!
interface Serial0
ip address 14.70.0.7 255.255.255.0
!
interface BRI0
ip address 14.40.0.7 255.255.255.0
encapsulation ppp
dialer idle-timeout 0
dialer map ip 14.40.0.4 name router4-1750-1 broadcast
dialer-group 1
isdn switch-type basic-ni
isdn spid1 0835866201
isdn spid2 0835866401
!
interface FastEthernet0
no ip address
ip pim sparse-dense-mode
ip ospf message-digest-key 1 md5 ipexpert
ip ospf priority 0
ip cgmp
speed auto
!
router eigrp 1
network 14.0.0.0
no auto-summary
no eigrp log-neighbor-changes
!
router ospf 1
log-adjacency-changes
network 14.37.0.7 0.0.0.0 area 0
network 14.40.0.0 0.0.0.255 area 0
network 14.70.0.0 0.0.0.255 area 0
network 15.5.5.5 0.0.0.0 area 0
network 15.15.15.15 0.0.0.0 area 0
default-information originate
!
no ip classless
ip route 0.0.0.0 0.0.0.0 Loopback0
no ip http server
!
access-list 101 deny eigrp any any
access-list 101 permit ip any any
dialer-list 1 protocol ip permit
alias exec c conf t
alias exec rb show run | begin
alias exec ri show run | include
!
line con 0
exec-timeout 120 0
login local
line aux 0
line vty 0 4
exec-timeout 120 0
login local
!
end
This archive was generated by hypermail 2.1.4 : Sat Apr 05 2003 - 08:51:32 GMT-3