From: Kirk Graham (kgraham@instructors.net)
Date: Wed Dec 01 2004 - 10:46:19 GMT-3
Rohan,
Just about OSPF. If you change a Hello/Dead timer on one router, then it
will no longer form an adjacency with any other router directly attached on
the same network.
There would be 3 ways that I know of to change the Hello/Dead timers.
1) Changing the hello time on an interface, also adjusts the Dead timer (4
x Hello) as George said.
Router(config-if)# ip ospf hello-interval <time>
2) Changing the dead timer only affects the Dead timer.
Router(config-if)# ip ospf dead-interval <time>
3) Changing the ospf network type for the interface sometimes uses
different default Hello/Dead timers. Broadcast & Pt-2-Pt use 10/40 and NBMA
& Pt-2-MPt use 30/120.
Router(config-if)# ip ospf network <type>
Use the "show ip ospf interface" command to verify the hello/dead timers.
Hope this helps some,
Kirk!
At 06:34 AM 12/1/2004, Rohan Grover wrote:
>Hi George,
>
>Thanks for that OSPF tip...did not know that. I actually wanted to confirm
>that in the case of RIP, is it expected that we change
>all the other timers on all other routers in the lab if asked to change
>update timer on 1 router?
>
>Thanks
>Rohan
>
>-----Original Message-----
>From: Georg Pauwen [mailto:pauwen@hotmail.com]
>Sent: Wednesday, December 01, 2004 5:57 PM
>To: rohang@cisco.com; ccielab@groupstudy.com
>Subject: RE: RIP OSPF Timers
>
>
>Hello Rohan,
>
>for OSPF, it depends on what you change first: if you change the
>hello-interval, the dead-timer automatically changes to 4 times that value.
>If you change the dead-interval, the hello-interval does not change. The
>RIP timers can all be set individually, changing one does
>not influence
>the others.
>
>HTH,
>
>Georg
>
> >From: "Rohan Grover" <rohang@cisco.com>
> >Reply-To: "Rohan Grover" <rohang@cisco.com>
> >To: "'Cisco certification'" <ccielab@groupstudy.com>
> >Subject: RIP OSPF Timers
> >Date: Wed, 1 Dec 2004 17:32:47 +0530
> >
> >Hi,
> >
> >If the question asks to change the OSPF hello timer or the RIP update
> >timer, is it also necessary to change all related timers? Like
> >the holddown/flush timers on RIP?
> >
> >Also I assume that the timers will be changed on all routers in the RIP
> >doamin/ OSPF area?
> >
> >Thanks
> >Rohan
> >
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