floating static routes

[larrys]

if a rip enabled primary interface goes down and is backed up by a dialer 1 Floating static route with an admin distance of e.g 200 can a second Dialer 2 be configured to connect to the same location via a second floating static route e.g admin cost 240. In the event of Dialer 1 not connecting.

[pkhatri]

Hi Larry,

Unfortunately, I don't think that will work. Dialer interfaces are always in a spoofing state and are therefore always up. Therefore, as per your example, the static route with the AD of 200 will be installed in the routing table as soon as the RIP route disappears. Regardless of whether or not dialer1 is successful in dialing out, this route will remain active.

Why don't you just include two ISDN interfaces within the same dialer group i.e. associate them with the same dialer interface ?

Hope that helps - pls rate the post if it does.

Regards,

Paresh.

[larrys]

Paresh

Actual design Problem

Currently Primary FR is backup By dialer0

Customer is looking for VPN establishment to primary location in the event of dialer non connection.

Any Suggestions.

Many Thanks

Larry_s

[pkhatri]

Hi Larry,

I'm not sure I'm getting your setup... if you have a primary FR link that goes down, you would like to initiate a dialer connection. If that is unsuccessful, you would like to use a VPN .. over what link are you going to establish the VPN ? Is there also an internet link ?

Paresh.

[pkhatri]

Hi Larry,

Just one more thing... as per my first post, you can see that once a static route points to a Dialer interface, it's not going to go down.

Therefore, if you are looking at various ways of backing up a site, and a dialer is one of them, then you need to make it the last resort....

Hope that helps,

Paresh

[larrys]

Paresh

I Think I did not post my last mail.

Yes

The remote site is backing up the FR circuit with a dialer interface. In the event of the Dialer connection not establishing there is a wish for an automatic ISDN Call to and ISP and establish a VPN tunnel to HQ. I have thought about a second router however I believe the brimary router would need to be disconnected for the secondry router to establish the tunnel.

Larry_s

[pkhatri · Accepted solution]

Hi Larry,

I've given this a bit of thought and believe that you can possibly get this going using the feature 'Reliable Static Routing Backup Using Object Tracking'. There's some info and examples regarding this here:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123newft/123limit/123x/123xe/dbackupx.htm#wp1071672

Essentially, you would use the 'track' keyword with the 'ip route' statement for the floating static route for your first dialer. The static route would only be installed if you had actual connectivity over this dialer. If your dialer does not come up, the track object will change status to down and bring down that floating static route, enabling your third static default route to kick in.

I have not tried this personally but the approack makes sense...

Hope that helps - pls rate the post if it does.

Regards,

Paresh

[larrys]

Paresh

Many Thanks for you assistance

I will give the Reliable Static Routing Backup Using Object Tracking a go.

larry_s

[mheusinger]

Hello,

it will not work from an IP routing perspective, because the floating static with AD 200 will always be better than the static with AD 240. So the second one will never be used. What you could do is using a second telephone number:

interface Dialer2

ip address negotiated

encapsulation ppp

dialer pool 1

dialer remote-name xxxxxx

dialer string 0800123456

dialer string 00800123456

...

You can replace the telephone numbers with something suitable for your environment.

This will in a first step initialize the proper telephone connection.

Hope this helps! Please rate all posts.

Regards, Martin