From: Alex Steer (alex.steer@eison.co.uk)
Date: Sun Aug 12 2007 - 09:26:10 ART
Sorry
I thought it would be something stupid. It doesn't work if you admin
down the subinterface.
Shut down the other end and it works fine.
Kind regards
Alex
From: Alex Steer
Sent: 12 August 2007 13:15
To: Group study
Subject: back interface command on point-to-point subinterface
Hi group study
I am having some trouble getting the "backup interface" command to work
on a point-to-point sub interface. Both interfaces have been tested to
confirm that they work and I have also tried the exact same command on
the main serial interface (that works). I shutdown the point-to-point
subinterface and get the following:-
Interface IP-Address OK? Method Status
Protocol
Serial0/0 unassigned YES NVRAM up
up
Serial0/0.401 148.1.0.4 YES NVRAM administratively
down down
Serial0/1 148.1.45.4 YES NVRAM standby
mode/disabled down
It seems like a really simple task but I can't for the life of me get it
to work. Has anybody got any suggestions that could help me please?
For completeness I have included the interface config though there is
only one line (please note the shutdown command has been added
intentionally to test the backup)
interface Serial0/0
no ip address
encapsulation frame-relay
no arp frame-relay
no frame-relay inverse-arp
interface Serial0/0.401 point-to-point
backup interface Serial0/1
ip address 148.1.0.4 255.255.255.0
shutdown
Many thanks in advance (I know someone is going to tell me that I
haven't turned the router on or something on this one)
I am trying this on a 3620 but have since tried (with the same problem
on a 7204)
Many thanks in advance
Alex
Cisco Internetwork Operating System Software
IOS (tm) 3600 Software (C3620-J1S3-M), Version 12.3(21), RELEASE
SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2006 by cisco Systems, Inc.
Compiled Mon 06-Nov-06 14:22 by ccai
Image text-base: 0x60008B00, data-base: 0x619E8000
ROM: System Bootstrap, Version 11.1(19)AA, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
ROM: 3600 Software (C3620-J1S3-M), Version 12.3(21), RELEASE SOFTWARE
(fc2)
Router4 uptime is 54 minutes
System returned to ROM by power-on
System image file is "slot0:c3620-j1s3-mz.123-21.bin"
cisco 3620 (R4700) processor (revision 0x81) with 61440K/4096K bytes of
memory.
Processor board ID 10130077
R4700 CPU at 80MHz, Implementation 33, Rev 1.0
Bridging software.
X.25 software, Version 3.0.0.
TN3270 Emulation software.
2 Ethernet/IEEE 802.3 interface(s)
1 Token Ring/IEEE 802.5 interface(s)
2 Serial network interface(s)
DRAM configuration is 32 bits wide with parity disabled.
29K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)
16384K bytes of processor board PCMCIA Slot0 flash (Device not
programmable)
Cisco IOS Software, 7200 Software (C7200-JK9S-M), Version 12.3(14)T7,
RELEASE SOFTWAR
E (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2006 by Cisco Systems, Inc.
Compiled Thu 23-Mar-06 04:43 by pwade
ROM: System Bootstrap, Version 12.1(20000914:181332) [bwhatley-npe200
102], DEVELOPME
NT SOFTWARE
BOOTLDR: 7200 Software (C7200-BOOT-M), Version 12.0(9), RELEASE SOFTWARE
(fc1)
Router6 uptime is 1 hour, 6 minutes
System returned to ROM by power-on
Running default software
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be
found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
export@cisco.com.
Cisco 7206 (NPE200) processor (revision B) with 114688K/16384K bytes of
memory.
Processor board ID 8770749
R5000 CPU at 200MHz, Implementation 35, Rev 2.1, 512KB L2 Cache
6 slot midplane, Version 1.3
Last reset from power-on
Number of Fast PAs = 2
Number of Fast+Medium PAs = 2
Total number of PA bandwidth points consumed = 500
Please refer to the following document "Cisco 7200 Series Port
Adaptor Hardware Configuration Guidelines" on CCO <www.cisco.com>,
for c7200 bandwidth points oversubscription/usage guidelines.
3 FastEthernet interfaces
4 Serial interfaces
125K bytes of NVRAM.
4096K bytes of packet SRAM memory.
46976K bytes of ATA PCMCIA card at slot 0 (Sector size 512 bytes).
4096K bytes of Flash internal SIMM (Sector size 256K).
Configuration register is 0x2102
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