Mailing List Archive

Hi,

I have this problem, I work to ISP, in our pop we have a Cisco 7206VXR with
ATM card that manage all adsl and hdsl our customers, now we have this
pronblem, one customer have Cisco 1721 with wic-1adsl and wic-1t, he use
wic-1adsl by adsl that arrive to our Cisco 7206, and wic-1t with modem
frame-relay to atm that also arrive to our same Cisco 7206.
On Cisco 1721 at FA0 it have public subnet ip that can reacheable from adsl
and hdsl (frame-relay).
He would use HDSL as primary line and adsl as backup. On 1721 I setup two
default route the first to s0.1 with 0 and second to atm0.1 with 10, so when
s0.1 go down it use atm0.1. From other side (inside our pop) on cisco 7206 I
use same conf but in route I use not interface but next hop, when it made
unreachable route don't delete and so not work ??

Thank you

Matteo

>From what I can understand, your Cisco 7206 is not routing to the backup
route when the primary route fails. I'm not a router jock, but I'm guessing
that's because the 7206 has no reason to update its route entry. When the
HDSL link goes down the link status on the 7206 may not go down.



Here's some good articles on this topic:

http://www.nil.com/ipcorner/SmallSiteMultiHoming/

http://www.nil.com/ipcorner/RedundantMultiHoming/

http://blog.ioshints.info/search/label/load%20balancing

http://blog.internetworkexpert.com/tag/load-balancing/



Frank



From: cisco-bba-bounces@puck.nether.net
[mailto:cisco-bba-bounces@puck.nether.net] On Behalf Of Matteo
Sent: Sunday, January 18, 2009 5:03 AM
To: cisco-bba@puck.nether.net
Subject: [cisco-bba] cisco dual wan atm



Hi,



I have this problem, I work to ISP, in our pop we have a Cisco 7206VXR with
ATM card that manage all adsl and hdsl our customers, now we have this
pronblem, one customer have Cisco 1721 with wic-1adsl and wic-1t, he use
wic-1adsl by adsl that arrive to our Cisco 7206, and wic-1t with modem
frame-relay to atm that also arrive to our same Cisco 7206.

On Cisco 1721 at FA0 it have public subnet ip that can reacheable from adsl
and hdsl (frame-relay).

He would use HDSL as primary line and adsl as backup. On 1721 I setup two
default route the first to s0.1 with 0 and second to atm0.1 with 10, so when
s0.1 go down it use atm0.1. From other side (inside our pop) on cisco 7206 I
use same conf but in route I use not interface but next hop, when it made
unreachable route don't delete and so not work ??



Thank you



Matteo

You may want to look at doing end to end LMI keepalives on your frame-relay
circuit to actually pull the link down and remove the route from the rib.



From: cisco-bba-bounces@puck.nether.net
[mailto:cisco-bba-bounces@puck.nether.net] On Behalf Of Matteo
Sent: Sunday, 18 January 2009 9:33 PM
To: cisco-bba@puck.nether.net
Subject: [cisco-bba] cisco dual wan atm



Hi,



I have this problem, I work to ISP, in our pop we have a Cisco 7206VXR with
ATM card that manage all adsl and hdsl our customers, now we have this
pronblem, one customer have Cisco 1721 with wic-1adsl and wic-1t, he use
wic-1adsl by adsl that arrive to our Cisco 7206, and wic-1t with modem
frame-relay to atm that also arrive to our same Cisco 7206.

On Cisco 1721 at FA0 it have public subnet ip that can reacheable from adsl
and hdsl (frame-relay).

He would use HDSL as primary line and adsl as backup. On 1721 I setup two
default route the first to s0.1 with 0 and second to atm0.1 with 10, so when
s0.1 go down it use atm0.1. From other side (inside our pop) on cisco 7206 I
use same conf but in route I use not interface but next hop, when it made
unreachable route don't delete and so not work ??



Thank you



Matteo

Matteo,

Take a look at "Reliable Static Routing Backup Using Object Tracking":
http://www.cisco.com/en/US/docs/ios/12_3/12_3x/12_3xe/feature/guide/dbackupx.html

Arie

On Sun, Jan 18, 2009 at 1:02 PM, Matteo <mr.tetto@gmail.com> wrote:

> Hi,
>
> I have this problem, I work to ISP, in our pop we have a Cisco 7206VXR with
> ATM card that manage all adsl and hdsl our customers, now we have this
> pronblem, one customer have Cisco 1721 with wic-1adsl and wic-1t, he use
> wic-1adsl by adsl that arrive to our Cisco 7206, and wic-1t with modem
> frame-relay to atm that also arrive to our same Cisco 7206.
> On Cisco 1721 at FA0 it have public subnet ip that can reacheable from adsl
> and hdsl (frame-relay).
> He would use HDSL as primary line and adsl as backup. On 1721 I setup two
> default route the first to s0.1 with 0 and second to atm0.1 with 10, so when
> s0.1 go down it use atm0.1. From other side (inside our pop) on cisco 7206 I
> use same conf but in route I use not interface but next hop, when it made
> unreachable route don't delete and so not work ??
>
> Thank you
>
> Matteo
>
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>