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Webcast-Catalyst9k
New Member

How to prevent OSPF update from bringing up the dialer interface?

I have a 1720 connected to remote site 3620 through one serial and one BRI.

Right now I am using static route, I intend to use OSPF. How do I configure to prevent OSPF bring up the dialer interface? Is there any related document?

Thank you.

4 REPLIES
Silver

Re: How to prevent OSPF update from bringing up the dialer inter

access-list 100deny ip any 224.0.0.0 0.0.0.255 (denies multicast, hello packets )

access-list 100 deny ip any host 255.255.255.255 (denies broadcast)

access-list 100 permit ip any any

dialer-list 1 permit ip list 100

Purple

Re: How to prevent OSPF update from bringing up the dialer inter

We just put "Passive Interface" on the dialer , this prevents any ospf updates from being sent out the interface . Keep using a static for ISDN with a high weight of say 250 and use ospf for your normal serial line traffic , if the serial goes away the static takes over and should bring up the isdn , works well for us .

New Member

Re: How to prevent OSPF update from bringing up the dialer inter

Thank you very much! I will try this out.

New Member

Re: How to prevent OSPF update from bringing up the dialer inter

Hello,

you can use ip ospf demand-circuit and ip ospf cost command to suppress ospf to bringing up dialer interface and using serial as primary link

http://www.cisco.com/warp/public/104/dc.html

best regards

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