07-17-2003 11:52 PM - edited 03-02-2019 08:56 AM
Hi,
Currently, we've a customer running FR over EIGRP and being backup by ISDN, which means when the serial is down, the isdn should take over, but it doesn't. Below are the config and version for the HQ and branch router.
Thanks in advance.
HQ
--
HQ#sh run
Building configuration...
Current configuration : 6416 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname HQ
!
enable secret 5 $1$IAZJ$yv.lrWLgr5sEGdHl/46vg.
!
username branch password 7 branch
clock timezone MAS 8
ip subnet-zero
!
!
no ip domain-lookup
!
isdn switch-type primary-net5
!
controller E1 2/0
framing NO-CRC4
pri-group timeslots 1-31
!
!
!
interface Loopback0
ip address 20.20.20.1 255.255.255.224
!
interface FastEthernet0/0
ip address 128.128.1.251 255.255.255.0
duplex auto
speed auto
!
interface Serial0/0
bandwidth 512
no ip address
encapsulation frame-relay IETF
no fair-queue
frame-relay lmi-type ansi
!
interface Serial0/0.301 point-to-point
description **connection to branch**
ip address 192.168.25.5 255.255.255.252
frame-relay interface-dlci 301
!
interface Serial0/0.302 point-to-point
description **connection to branch2**
ip address 192.168.25.9 255.255.255.252
frame-relay interface-dlci 302
!
interface Serial0/0.303 point-to-point
description **connection to branch3**
ip address 192.168.25.13 255.255.255.252
frame-relay interface-dlci 303
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/1
no ip address
shutdown
clockrate 2000000
!
interface FastEthernet1/0
no ip address
shutdown
duplex auto
speed auto
!
interface Serial2/0:15
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type primary-net5
ppp authentication chap
!
interface Dialer1
ip unnumbered Loopback0
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication chap
!
router eigrp 1
network 20.0.0.0
network 128.128.0.0
network 192.168.25.0
no auto-summary
no eigrp log-neighbor-changes
no eigrp log-neighbor-warnings
!
ip classless
ip http server
ip pim bidir-enable
!
!
dialer-list 1 protocol ip permit
!
line con 0
line aux 0
line vty 0 4
!
end
HQ# sh ver
Cisco Internetwork Operating System Software
IOS (tm) 3700 Software (C3745-I-M), Version 12.2(8)T5, RELEASE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Thu 20-Jun-02 14:50 by ccai
Image text-base: 0x60008940, data-base: 0x60AEC000
ROM: System Bootstrap, Version 12.2(8r)T2, RELEASE SOFTWARE (fc1)
HQ uptime is 2 minutes
System returned to ROM by power-on
System image file is "flash:c3745-i-mz.122-8.T5.bin"
cisco 3745 (R7000) processor (revision 53.51) with 131072K/13312K bytes of memor
y.
Processor board ID
R7000 CPU at 350Mhz, Implementation 39, Rev 3.3, 256KB L2, 2048KB L3 Cache
Channelized E1, Version 1.0.
Bridging software.
X.25 software, Version 3.0.0.
Primary Rate ISDN software, Version 1.1.
3 FastEthernet/IEEE 802.3 interface(s)
31 Serial network interface(s)
2 Serial(sync/async) network interface(s)
1 Channelized E1/PRI port(s)
DRAM configuration is 64 bits wide with parity disabled.
151K bytes of non-volatile configuration memory.
31360K bytes of ATA System CompactFlash (Read/Write)
Configuration register is 0x101
BRANCH
------
branch#sh run
Building configuration...
Current configuration : 3451 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname branch
!
enable secret 5 branch
!
username HQ password 7 branch
ip subnet-zero
!
!
!
isdn switch-type basic-net3
!
!
!
interface Loopback0
ip address 20.20.20.2 255.255.255.224
!
interface FastEthernet0/0
ip address 128.128.26.251 255.255.255.0
duplex auto
speed auto
!
interface Serial0/0
bandwidth 64
no ip address
encapsulation frame-relay IETF
shutdown
frame-relay lmi-type ansi
!
interface Serial0/0.300 point-to-point
description ***(HQ1)**
ip address 192.168.25.6 255.255.255.252
frame-relay interface-dlci 300
!
interface Serial0/0.301 point-to-point
description *** (HQ2)**
ip address 192.168.26.6 255.255.255.252
frame-relay interface-dlci 301
!
interface Serial0/0.302 point-to-point
description *** (HQ3)**
ip address 192.168.27.6 255.255.255.252
frame-relay interface-dlci 302
!
interface Serial0/0.400 point-to-point
description *** (NCC)**
ip address 192.168.30.6 255.255.255.252
frame-relay interface-dlci 400
!
interface BRI0/0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
!
interface Serial0/1
bandwidth 64
backup delay 5 60
backup interface BRI0/0
no ip address
encapsulation frame-relay IETF
frame-relay lmi-type ansi
!
interface Dialer1
description **Backup HQ1**
ip unnumbered Loopback0
ip access-group ISDN_Backup out
encapsulation ppp
dialer pool 1
dialer idle-timeout 180
dialer string 0326170160
dialer-group 1
ppp authentication chap
!
router eigrp 1
network 20.0.0.0
network 128.128.0.0
network 192.168.25.0
network 192.168.26.0
network 192.168.27.0
network 192.168.30.0
network 192.168.31.0
distribute-list 1 in
no auto-summary
no eigrp log-neighbor-changes
!
ip classless
ip http server
ip pim bidir-enable
!
!
ip access-list extended ISDN_Backup
permit ip any any
!
access-list 1 permit 128.128.1.0 0.0.0.255
access-list 1 permit 128.128.11.0 0.0.0.255
access-list 1 permit 161.72.0.0 0.0.255.255
access-list 1 permit 161.80.0.0 0.0.255.255
access-list 1 permit 10.10.0.0 0.0.255.255
dialer-list 1 protocol ip permit
!
line con 0
line aux 0
line vty 0 4
!
time-range ISDN_Backup
periodic weekdays 8:00 to 20:00
periodic Saturday 8:00 to 20:00
!
!
end
branch>sh version
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-I-M), Version 12.2(8)T5, RELEASE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Fri 21-Jun-02 08:50 by ccai
Image text-base: 0x80008074, data-base: 0x80A2BD40
ROM: System Bootstrap, Version 12.2(7r) [cmong 7r], RELEASE SOFTWARE (fc1)
Branch uptime is 3 days, 8 hours, 24 minutes
System returned to ROM by power-on
System image file is "flash:c2600-i-mz.122-8.T5.bin"
cisco 2620XM (MPC860P) processor (revision 0x100) with 28672K/4096K bytes of mem
ory.
Processor board ID JAD06470HD7 (914285734)
M860 processor: part number 5, mask 2
Bridging software.
X.25 software, Version 3.0.0.
Basic Rate ISDN software, Version 1.1.
1 FastEthernet/IEEE 802.3 interface(s)
2 Serial(sync/async) network interface(s)
1 ISDN Basic Rate interface(s)
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102
07-18-2003 03:00 AM
Hi
Does the bri interface come up if the FR is down?
So if it comes up the call is placed but the routing over it possibly does not work. If the bri just stays down no call is placed.
What does "debug dialer" show?
Regards
Roger
07-18-2003 03:05 AM
Roger,
Before the fr is down, the bri0/0 is in standby mode, but when the fr is down, the bri0/0 is up but it does not dial. Debug dialer doesn't shows anything.
Is there anything wrong with the config or the version?
Thanks.
07-18-2003 05:57 AM
HI
So it looks as there are no interesting packet to bring up the isdn. So could be about the routing.
You are running EIGRP...do you want to run EIGRP also
over the isdn?
You also work with ip unnumbered.
Can you give it an ip address also on the remote site. Then define a static route to the dialer interface with a high admin distance.
like:
interface dialer 1
ip address 172.16.1.1 255.255.255.252
encapsulation ppp
dialer pool 1
dialer idle-timeout 180
dialer string 0326170160
dialer-group 1
ppp authentication chap
!
ip route 0.0.0.0 0.0.0.0 172.16.1.2 180
!
Now do the debug dialer again. Now if there is traffic and the serial is down the static route shoul kick in and bring bring up the bri.
Can you try that?
Here also a link on how to configure ddr with dialer profiles.
http://www.cisco.com/en/US/tech/tk801/tk133/technologies_configuration_example09186a0080093c2e.shtml
Hope it helps
Roger
07-18-2003 03:08 AM
On the branch side you do not need the ACL ISDN_Backup out on the dialer ,
Add this to the ACL that defines interesting traffic
permit ip any any time-range ISDN_Backup .
turn on debug dialer
Could you ping 20.20.20.1 and source it from the dialer 1 .
On the branch the sh ver shows that the BRI does not have an internal NT1 , is this in North America ? if it is you will need an external NT1
could you paste in sh isdn st from both sides , also debug isdn q921 & isdn q931
07-18-2003 06:08 AM
Didnt understand why you have given backup interface on serial 0/1 when you have configured serial 0/0 with frame relay and connected to HQ with subinterfaces.
give the back up interface on the subinterface on the subinterface which needs back up.
i think what u have given is misconfiguration
snippet from ur configuration shows serial 0/0 is configured with HQ but s0/1 is provided with backup interface.
interface Serial0/0
bandwidth 64
no ip address
encapsulation frame-relay IETF
shutdown
frame-relay lmi-type ansi
!
interface Serial0/0.300 point-to-point
description ***(HQ1)**
ip address 192.168.25.6 255.255.255.252
frame-relay interface-dlci 300
interface BRI0/0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
!
interface Serial0/1
bandwidth 64
backup delay 5 60
backup interface BRI0/0
no ip address
encapsulation frame-relay IETF
frame-relay lmi-type ansi
-Deepu
07-22-2003 10:51 PM
Guys,
Actually I'm trying to do an isdn backup on the serial interface or the frame relay, but it seems that the isdn doesn't initiate the call until i rebooted the router. I've removed all the access-list on the time range.
One more question, how do i configure the date/time for the router ? I used the 'clock set' command, but when the router is rebooted, the date/time is changed back to default.
Thanks..
07-22-2003 11:02 PM
Hi
Time will be lost whenever you reboot a router and you have set the time manually.
You could enable NTP/SNTP so you router will synchronise the time from an NTP source. Check the config guides on NTP/SNTP:
Regards
Roger
07-22-2003 11:06 PM
Hi Roger,
What if there's not NTP server available ? Any other options ?
Thanks..
07-23-2003 07:46 PM
Hi,
Since the time cannot be saved, I think i've no choice but to use access list to control the dialing, but the isdn backup will be running on eigrp also, which there'll be a hello packet every 60 seconds, which is irrelavant if there's no interesting traffic, i've tried to deny the hello packet in the access list and permit other ip packet, but its still dialing when there's an eigrp hello packet.
access-list 101 deny ip any 224.0.0.10
access-list permit ip any any
Is the access list correct, or do we have other way ?
Thanks in advance..
07-23-2003 11:22 PM
Hi
Did you try to do the ACL like this:
access-list 101 deny eigrp any any
access-list 101 permit ip any any
Regards
Roger
07-24-2003 05:54 PM
Roger,
Just tried, and below are the debug output :
00:01:11: BR0/0 DDR: rotor dialout [best] least recent failure is also most recent failure
00:01:11: BR0/0 DDR: rotor dialout [best] also has most recent failure
00:01:11: BR0/0 DDR: rotor dialout [best]
00:01:11: BR0/0 DDR: Dialing cause ip (s=20.20.20.20, d=224.0.0.10)
00:01:11: BR0/0 DDR: Attempting to dial 26170160
00:01:11: ISDN BR0/0 EVENT: UserIdle: callid 0x800E received ISDN_CALL (0x0)
00:01:53705998508: ISDN BR0/0 EVENT: process_rxstate: ces/callid 1/0x800E calltype 1 HOST_PROCEEDING
00:01:53705998508: ISDN BR0/0 EVENT: process_rxstate: ces/callid 1/0x800E calltype 1 HOST_DISCONNECT
00:01:51539607556: BRI0/0: wait for isdn carrier timeout, call id=0x800E
00:01:53705998508: ISDN BR0/0 EVENT: process_rxstate: ces/callid 1/0x800E calltype 1 HOST_DISCONNECT_ACK
00:01:16: BR0/0 DDR: rotor dialout [best] least recent failure is also most recent failure
00:01:16: BR0/0 DDR: rotor dialout [best] also has most recent failure
00:01:16: BR0/0 DDR: rotor dialout [best]
00:01:16: BR0/0 DDR: Dialing cause ip (s=20.20.20.20, d=224.0.0.10)
00:01:16: BR0/0 DDR: Attempting to dial 26170160
00:01:16: ISDN BR0/0 EVENT: UserIdle: callid 0x800F received ISDN_CALL (0x0)
00:01:70885867692: ISDN BR0/0 EVENT: process_rxstate: ces/callid 1/0x800F calltype 1 HOST_PROCEEDING
00:01:75180834988: ISDN BR0/0 EVENT: process_rxstate: ces/callid 1/0x800F calltype 1 HOST_DISCONNECT
00:01:73014444036: BRI0/0: wait for isdn carrier timeout, call id=0x800F
00:01:75180834988: ISDN BR0/0 EVENT: process_rxstate: ces/callid 1/0x800F calltype 1 HOST_DISCONNECT_ACK
00:01:20: BR0/0 DDR: rotor dialout [best] least recent failure is also most recent failure
00:01:20: BR0/0 DDR: rotor dialout [best] also has most recent failure
00:01:20: BR0/0 DDR: rotor dialout [best]
00:01:20: BR0/0 DDR: Dialing cause ip (s=20.20.20.20, d=224.0.0.10)
00:01:20: BR0/0 DDR: Attempting to dial 26170160
00:01:20: ISDN BR0/0 EVENT: UserIdle: callid 0x8010 received ISDN_CALL (0x0)
00:01:88065736876: ISDN BR0/0 EVENT: process_rxstate: ces/callid 1/0x8010 calltype 1 HOST_PROCEEDING
Thanks
07-25-2003 09:05 AM
HI
As you can see by the debug output is the cause
of you dialing the packet from source 20.20.20.20
to destination 224.0.0.10 which is probably eigrp.
Now what you could do is just deny this packet so it
does not get up all the time.
Like:
access-list 111 deny ip host 20.20.20.20 host 224.0.0.10
access-list 111 permit ip any any
dialer-list 1 protocol ip list 111
That should work....but still i would try to identifiy what really should bring up the isdn and then create an ACL according that.
If you like i could post a sample about a working isdn backup setup. Just let me know.
Regards
Roger
07-22-2003 11:05 PM
Guys,
Actually I'm trying to do an isdn backup on the serial interface or the frame relay, but it seems that the isdn doesn't initiate the call until i rebooted the router. I've removed all the access-list on the time range.
One more question, how do i configure the date/time for the router ? I used the 'clock set' command, but when the router is rebooted, the date/time is changed back to default.
Thanks..
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