From: Ben (ccieben@cox.net)
Date: Mon Aug 13 2007 - 02:06:48 ART
Hi Alex,
You can make it work with Frame-Relay End-to-End Keepalives (see example
below).
http://www.cisco.com/en/US/products/sw/iosswrel/ps1830/products_feature_guide09186a0080087a58.html
HTH
Ben
******************
Router 1
******************
map-class frame-relay FREEK
frame-relay end-to-end keepalive mode bidirectional
interface Serial1/0
description TO FRAME
no ip address
encapsulation frame-relay
serial restart-delay 0
no frame-relay inverse-arp
!
interface Serial1/0.103 point-to-point
backup interface Serial1/1
ip address 172.16.103.1 255.255.255.0
logging event subif-link-status
frame-relay interface-dlci 103
class FREEK
!
interface Serial1/1
description TO R3
ip address 172.16.31.1 255.255.255.0
serial restart-delay 0
******************
Router 3
******************
map-class frame-relay FREEK
frame-relay end-to-end keepalive mode bidirectional
interface Serial1/0
no ip address
description TO FRAME
encapsulation frame-relay
serial restart-delay 0
no frame-relay inverse-arp
!
interface Serial1/0.103 point-to-point
ip address 172.16.103.3 255.255.255.0
logging event subif-link-status
frame-relay interface-dlci 301
class FREEK
!
interface Serial1/2
ip address 172.16.31.3 255.255.255.0
description TO R1
serial restart-delay 0
Test it - On R3:
Rack1R3(config)#int s1/0.103
Rack1R3(config-subif)#frame-relay interface-dlci 301
Rack1R3(config-fr-dlci)#no class FREEK
Rack1R3(config-fr-dlci)#no class FREEK
! wait for the keepalives to expire - R1:
*Mar 1 00:20:33.123: %LINEPROTO-5-UPDOWN: Line protocol on Interface
Serial1/0.103, changed state to down
*Mar 1 00:20:33.131: %FR_EEK-5-FAILED: Interface Serial1/0.103 - DLCI 103
Rack1R1#
*Mar 1 00:20:35.663: %LINK-3-UPDOWN: Interface Serial1/1, changed state
to up
Rack1R1#
*Mar 1 00:20:36.667: %LINEPROTO-5-UPDOWN: Line protocol on Interface
Serial1/1, changed state to up
Rack1R1#
R3:
*Mar 1 00:20:34.287: %LINEPROTO-5-UPDOWN: Line protocol on Interface
Serial1/2, changed state to up
Alex Steer wrote:
> 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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