[c-nsp] cisco 1721 & load sharing across unequal paths.

Sat Dec 11 17:42:50 EST 2004

This is a multi-part message in MIME format.

hi there

I'm using the below IOS.
Looks like it doesn't have the track command under global config for object
tracking. do you think I should upgrade to a higher OS? and if yes which one
do you think would be appropriate?

currently I try eigrp with equal cost routes.. when I change one of the
links' state to down using the the shut command, it switches over to the
other interface and works just fine. However when I unplug the telephone
cable from the DSL modem, it doesn't recognize the route as being down and
behaves erratically: I can't check any emails etc. I change from
per-destination to per-packet load sharing on both interfaces but it behaves
even more erratically when I do that..
Please help :(

Cisco Internetwork Operating System Software
IOS (tm) C1700 Software (C1700-SY7-M), Version 12.2(8)T4,  RELEASE SOFTWARE
(fc1
)
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Fri 03-May-02 22:41 by ccai
Image text-base: 0x80008108, data-base: 0x80B6C730

ROM: System Bootstrap, Version 12.2(7r)XM1, RELEASE SOFTWARE (fc1)

----- Original Message ----- 
From: "Tantsura, Jeff" <jeff.tantsura at capgemini.com>
To: "ege iyioglu" <mail at iyioglu.com>; <cisco-nsp at puck.nether.net>
Sent: Tuesday, November 23, 2004 5:18 PM
Subject: RE: [c-nsp] cisco 1721 & load sharing across unequal paths.

>
> Hi,
>
> You should definitely go for EIGRP as it supports unequal load sharing
> and VLSM.
> Second option would be 1 primary and 1 backup path with floating default
> - in this example wireless is the primary
> ip route 0.0.0.0 0.0.0.0 <next hop IP wireless> 100
> ip route 0.0.0.0 0.0.0.0 <next hop IP serial> 200
>
> In this case you could also use Reliable Static Routing Backup Using
> Object Tracking
> http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps5413/products_
> feature_guide09186a00801d862d.html
> because if IP next hop is unreachable  but ethernet link is UP backup
> wont kick in.
>
> Hope this helps,
> Jeff
>
> With kind regards/ met vriendelijke groeten,
> --------------------------------------------------------
> Jeff Tantsura
> CCIE #11416
> Senior Consultant
> Capgemini Nederland BV
> Tel: +31(0)30 689 2866
> Mob:+31(0)6 4588 6858
> Fax: +31(0)30 689 6565
> --------------------------------------------------------
>
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of ege iyioglu
> Sent: Tuesday, November 23, 2004 3:15 PM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] cisco 1721 & load sharing across unequal paths.
>
> Hi there
> We have a Cisco 1721 router with a serial interface and an ethernet
> interface.. You can find the run and ver info below.
> The serial interface is connected to an ISP through a 1mbit leased line
> connection. The ethernet interface is connected to the inside network.
> We do NAT.
> We'd like to add another ethernet interface and connect it to a wireless
> access point that will receive an 8mbit connection from another ISP.
> Both connections will provide access to the internet.
> We also would like to implement load sharing and redundancy between
> those 2 interfaces (the serial interface and the 2nd ethernet
> interface..) our router has 32 MB of ram. I'm planning to run IGRP or
> EIGRP with the maximum-paths 2 command.
> First of all, do you think this is a feasible scenario that would
> provide load sharing and redundancy? And if it is, would our router's
> cpu and memory be enough for all of this or do we need an upgrade? I'm
> open to suggestions since this is the first time I will be doing this.
>
> Deep Regards
> Ege
>
> ------- sh run --------
> Building configuration...
>
> Current configuration : 1230 bytes
> !
> ! No configuration change since last restart !
> version 12.2
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname #####
> !
> logging buffered 16380 debugging
> no logging console
> enable password #####
> !
> username ##### callback-dialstring ##### password 0 ##### ip subnet-zero
> ! !
> ! ! chat-script callback ABORT ERROR ABORT BUSY "" "ATDT\T" TIMEOUT 30
> "CONNECT" \c modemcap entry usrmodem:MSC=&FS0=1&C1&D3&H1&R2&B1
> !
> !
> !
> interface FastEthernet0
> ip address 212.58.x.x 255.255.255.240
> speed auto
> !
> interface Serial0
> description #####
> bandwidth 1024
> ip address 212.2.x.x 255.255.255.252
> no ip route-cache
> no ip mroute-cache
> !
> interface Async5
> ip address 192.168.x.x 255.255.255.0
> encapsulation ppp
> async default routing
> async mode interactive
> ppp callback accept
> ppp authentication pap
> !
> ip classless
> ip classless
> no ip http server
> ip pim bidir-enable
> !
> !
> !
> !
> line con 0
> line aux 0
> script callback callback
> login local
> modem InOut
> modem autoconfigure type usrmodem
> transport input all
> autoselect during-login
> speed 300
> flowcontrol hardware
> line vty 0 4
> password #####
> login
> !
> no scheduler allocate
> end
>
> --------- sh ver -----------
>
> Cisco Internetwork Operating System Software IOS (tm) C1700 Software
> (C1700-SY-M), Version 12.2(8)YJ, EARLY DEPLOYMENT RELEAS E SOFTWARE
> (fc1) Synched to technology version 12.2(8.5)T TAC
> Support: http://www.cisco.com/tac Copyright (c) 1986-2002 by cisco
> Systems, Inc. Compiled Fri 21-Jun-02 15:38 by ealyon Image text-base:
> 0x80008124,
> data-base: 0x80B64A38
>
> ROM: System Bootstrap, Version 12.2(7r)XM1, RELEASE SOFTWARE (fc1)
> ROM: C1700 Software (C1700-SY-M), Version 12.2(8)YJ, EARLY DEPLOYMENT
> RELEASE SO FTWARE (fc1)
>
> bilfenrtr uptime is 1 day, 2 hours, 31 minutes System returned to ROM by
> power-on System restarted at 16:27:54 UTC Fri Nov 5 2004 System image
> file is "flash:c1700-sy-mz.122-8.YJ.bin"
>
> cisco 1721 (MPC860P) processor (revision 0x100) with 29492K/3276K bytes
> of memor y. Processor board ID FOC06330050 (1457551649), with hardware
> revision 0000 MPC860P processor: part number 5, mask 2 Bridging
> software. X.25 software, Version 3.0.0. 1 FastEthernet/IEEE 802.3
> interface(s) 1
> Serial(sync/async) network interface(s) 32K bytes of non-volatile
> configuration memory. 16384K bytes of processor board System flash
> (Read/Write)
>
> Configuration register is 0x2102
>
>
>
>
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