> RE: [swinog] OSPF Tuning...> why do you want to tune ospf timers ?
> 
> the default dead time is 120 sec. if a router crashs and the physical layer

Huh? Not in my case..:

GigabitEthernet0/0.4 is up, line protocol is up 
..
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
..

> doesnt go down for any reason (like bridged ethernet link with switches in
> the middle), you can sit down, take a coffee, smoke a cig, whatever, until

I've actually reduced timers in exactly such a setup (GE-ring based
on switches, with VLANs forming pseudo-WAN links for attached routers). 
In retrospect, I wouldn't do this again though, would probably rather
try to tweak STP to converge faster than to touch OSPF timers (reason: 
in DOS situations where links get saturated, having lower timers 
is a bitch...). I'm currently at hello=5 on this ring.

Cheers,
Markus

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