01-13-2004 11:44 AM - edited 03-02-2019 12:51 PM
Is it possible to configure HSRP to run across two interfaces on a 3620.
Basically if my serial line drops I want my ISDN to kick in quick.
Or is there a better solution
Thanks
01-13-2004 02:09 PM
http://www.cisco.com/pcgi-bin/Support/browse/psp_view.pl?p=Internetworking:HSRP
I don't think you can use HSRP since you're using a single router . It sounds like what you want is a routing protocol such as RIP, OSPF or EIGRP which will route traffic over the ISDN line when then the serial interface drops.
If your ISDN is not always active it will need to be brought up which of course takes time. Hope this helps answer your question, maybe someone else with more experince might add some insight as well.
01-13-2004 02:25 PM
That is correct. HSRP will not work in this situation. You would want to use DDR and then some sort of backup configuration such as Demand-Circuit, Snapshot Routing or just a basic Backup Interface.
It would be worth your will to read the post under Remote Access entitled "isdn backup problem"
01-14-2004 12:44 AM
Thanks your help, I read the article but it confused me a little.
Is it possible for you to give me an example of a config or an idea of a config that would carry out the failover that I need to happen.
01-14-2004 07:58 AM
The config would be much like the following.
nterface Serial0/0
backup delay 5 10
backup interface Bri0/0
ip address 189.18.100.3 255.255.255.248
ip router isis
encapsulation frame-relay
no fair-queue
frame-relay map ip 189.18.100.6 306 broadcast
no frame-relay inverse-arp
frame-relay lmi-type ansi
!
interface BRI0/0
ip address 189.18.36.1 255.255.255.252
encapsulation ppp
dialer map ip 189.18.36.2 name R6 broadcast 4082222221
dialer map ip 189.18.36.2 name R6 broadcast 4082222222
dialer-group 1
isdn switch-type basic-net3
ppp authentication chap
!
ip route x.x.x.x y.y.y.y 189.18.100.6
ip route x.x.x.x y.y.y.y 189.18.36.2 150
!
dialer-list 1 protocol ip permit
This would cause the Bri interface to come up 5 seconds after the Serial, FR , links goes down. And the routes that you have through the FR link will leave the routing table and the floating statics over the ISDN will come in. Once the FR link comes back and is up for 10 seconds, the ISDN will come down.
01-14-2004 04:50 AM
We use to configure HSRP on our ethernet ports running EIGRP on the router with 2 ip routes going to the tier II routers. If one route went down the other route would pass the traffic within milliseconds. Sorry can't be more help...its been awhile.
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